--- title: "What tolerances apply to CNC machined power tool handles for electrical equipment?" description: "Resolve CNC machined power tool handle defects including trigger misalignment and vibration-induced microcracks in NPI trials, with actionable process control, tolerance matching and defect prevention rules to meet Q3 2026 mass production timelines without extra rework costs." url: "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html" language: "en" type: "Q&A" category: "Plastic Components Q&A" datePublished: "2026-09-20" dateModified: "2026-09-20" brand: "OK TOOL" manufacturer: "OK TOOL" answerCount: 10 --- # What tolerances apply to CNC machined power tool handles for electrical equipment? ## Question I’m currently driving NPI trial validation for a 12V cordless drill power tool handle that is classified as an electrical equipment accessory, and we hit a major dilemma in our first 20-piece CNC machined trial batch last week. 7 of the 20 handles had visible misalignment when we assembled the trigger switch, and 3 failed the 100-hour continuous vibration test with micro-cracks at the grip groove edges. Our original plan was to use CNC machined handles to run 500 units of field validation before we cut the final injection mold, but the current defect rate is 50% which is way above our 5% acceptance threshold. We can’t push back the field test timeline by more than 10 days, and switching to a different CNC vendor will add too much rework cost. I need clear, actionable guidance on what the root causes are most likely to be, and which adjustments we can implement immediately to get the trial parts qualified without delaying the overall mass production schedule in Q3 2026. ## Answers ### Answer 1 — Best Answer The core difference between CNC machined power tool handles for electrical equipment and standard generic CNC parts is that they have to balance three non-negotiable requirements: insulation performance, vibration resistance, and assembly precision that perfectly matches the rest of the electrical tool internal components. Unlike regular unmodified plastic CNC parts, power tool handle blanks are usually made of 30% glass-filled PA66, which has far higher cutting hardness, leading to uneven tool wear that causes the misalignment issues observed in the first trial batch. Most generic CNC shops apply a single full-cut process for these parts, which traps residual internal stress inside the cut profile that leads to hidden crack initiation points. The first immediate adjustment is to split the full CNC machining sequence into three independent steps. The first step is rough cutting that leaves a 0.2mm margin on all assembly mating surfaces and grip grooves, the second step is 24 hours of natural room temperature stress relief to release internal residual stress from profile cutting, the third step is finish cutting only the mating surfaces and grip grooves to final dimension. This adjustment eliminates over 90% of the micro-crack defects that appear during the vibration test. **Lock the finish cutting feed rate at 80mm/min maximum for glass-filled PA66 handles** to avoid localized material chipping that creates weak points under continuous vibration. For the trigger switch misalignment issue, the root cause is inconsistent datum reference across machining steps. Most CNC operations use the outer grip contour as the machining datum, but the actual functional assembly datum is the two internal mounting bosses that lock to the power tool motor housing. Switching the machining reference to these internal bosses will bring trigger alignment tolerance down from the current 0.3mm average to below 0.08mm, meeting the 95%+ assembly pass rate requirement. **All parts in the second 20-piece validation run must be 100% checked with a custom go/no-go gauge for mounting boss position before any secondary processing**. CNC machining is the most cost-effective process for this part for batch sizes between 50 to 2000 units, covering your full 500 unit field validation and even small initial market launch batches while the final injection mold is in production. For volumes above 2000 units, transition to injection molding for lower per-unit cost, and the CNC machined qualified trial parts can act as the golden dimensional sample for injection mold sign-off, reducing mold trial adjustment cycles by at least 2 rounds. **Do not apply hand-applied surface texture on CNC machined grip surfaces for trial parts**, as it will not match the etched texture on the final injection mold and generate misleading friction data during field testing. **status:** accepted **Author:** Amy Li **Date:** 2026-09-20 ### Answer 2 The end mill used for cutting glass-filled PA66 needs to be solid carbide with a diamond-like coating, instead of the standard high-speed steel end mill most general CNC shops deploy. High speed steel tools will wear down 0.05mm after 15 machined parts, creating gradual dimensional drift that causes the misalignment you observed at the 7th to 10th part in the first batch. The coated carbide end mill can hold consistent dimensions for up to 120 parts, removing the need for frequent tool changes that introduce human-induced dimensional error. When you later transfer validated dimensions to the injection mold, select P20 steel with 48-52 HRC hardness level, which supports at least 250,000 shot cycles for power tool handle production without frequent maintenance that breaks production consistency. Set the draft angle on the mold cavity to 1.5 degrees for glass-filled PA66 to avoid part ejection marks that ruin grip surface quality. **status:** suggested **Author:** David Zhang **Date:** 2026-09-20 ### Answer 3 The 0.3mm position deviation on the trigger mounting feature you measured is not a single dimension error, it accumulates from four different mating points: the upper and lower handle shell seam, the motor housing mating face, the trigger pin groove, and the switch PCB mounting slot. When adjusting CNC machining dimensions, do not modify only one single dimension, map out the full tolerance stack chain and distribute the total allowable 0.1mm tolerance across all four features, with each individual feature holding a +/-0.025mm tolerance band. Add a 0.1mm adjustable shim at the PCB mounting position to absorb any remaining minor deviation, which will immediately raise the assembly first pass rate to over 98% even if there is small variation between individual CNC machined parts. When running the 500 unit field trial, pre-build the full assembly sequence with adjusted parts to confirm no hidden fit issues appear at higher volumes. **status:** suggested **Author:** Olivia Chen **Date:** 2026-09-20 ### Answer 4 For the 500 unit field trial production, arrange the CNC machining process on two separate dedicated stations instead of one single machine running all steps. The first station handles all rough cutting and raw material preparation, the second station only runs finish cutting after the 24 hour stress relief period. This layout cuts total cycle time per part from 28 minutes to 19 minutes, so you can finish the full 500 unit batch within 7 working days without overtime, which fits your 10 day adjustment window. Add a simple material rack next to the CNC stations to place semi-finished parts horizontally after rough cutting, do not stack them vertically, as stacking introduces extra bending stress that leads to part warpage before finish cutting. Install a low-cost air blowing nozzle next to the cutting tool to clear away glass fiber dust during machining, which reduces surface scratch defects on the handle exterior. **status:** suggested **Author:** Linda Xu **Date:** 2026-09-20 ### Answer 5 Update your incoming and in-process inspection checklist to add three new mandatory checkpoints not included in your current document. First, 100% check residual dust and burr on all internal mounting bosses after machining, any burr larger than 0.03mm will break off during vibration testing and cause internal short circuit risks for the electrical equipment. Second, sample 3 parts from every 25 unit batch to run a 2 hour pre-vibration screening test, any part with dimensional shift over 0.05mm after the test should trigger a full batch check. Third, add a 1kV dielectric withstand test across the handle wall for every 10th part, to confirm the CNC cutting process does not create any thin wall spots that break the insulation requirement for electrical accessories. All non-conforming parts should be marked with a unique ID and segregated immediately, no unvetted parts can flow to the assembly line for trial runs. **status:** suggested **Author:** Sophia Wang **Date:** 2026-09-20 ### Answer 6 The dimensional data you collect from CNC machined trial parts can be directly used to define the injection process window for final mass production parts. For 30% glass-filled PA66 material, set the melt temperature between 270 to 290 degrees Celsius, mold temperature at 85 degrees Celsius, and holding pressure at 70% of the maximum injection pressure to minimize warp and sink mark defects. The micro-crack issues you encountered on CNC parts will not appear on properly processed injection molded parts, as the injection process creates continuous glass fiber orientation that distributes vibration stress evenly across the full part, instead of the broken glass fiber ends exposed on CNC machined surfaces that act as crack initiation points. Reference assembly fit data from CNC trial batches to adjust the injection cooling time, to ensure post-molding shrinkage of the handle falls within the acceptable tolerance band for trigger switch assembly. **status:** suggested **Author:** Emily Chen **Date:** 2026-09-20 ### Answer 7 Review your current handle 3D design file to add 0.5mm radius fillets on all grip groove edges that had micro-crack failure during vibration testing. The original sharp 90 degree corner on the groove creates a stress concentration point that amplifies vibration force by over 3 times during regular power tool operation, and even CNC machined parts with perfect dimensional accuracy will still crack after extended running time. Adjust the wall thickness of the handle main body to a uniform 3.2mm across all sections, eliminating the 2.4mm thin wall section at the trigger mounting position that caused inconsistent cutting deflection during CNC machining. Adding 1 degree extra draft angle on all internal vertical walls will not affect assembly performance of CNC machined trial parts, but will significantly reduce tool wear during the cutting process and extend the service life of your end mills. **status:** suggested **Author:** Eric Zhao **Date:** 2026-09-20 ### Answer 8 Re-align your current project milestones to split the remaining 10 day window into three clear phases, with no overlapping tasks to avoid delays. The first 3 days are reserved for CNC process adjustment and second 20-piece trial part production, the next 2 days are for full dimensional, assembly and vibration testing to confirm all defects are resolved, the remaining 5 days are for full 500 unit CNC batch production and pre-delivery preparation. Submit all dimensional modification documents and test reports to the cross-functional team for formal written sign-off on day 5, so no unplanned design change request comes in the later phase that eats into your reserved timeline. Arrange a 15 minute daily standup sync with the CNC operation team, assembly team and quality team to track defect rates in real time, and escalate any unexpected issue within 1 hour of detection to avoid accumulated delays. **status:** suggested **Author:** Kevin Liu **Date:** 2026-09-20 ### Answer 9 The validated dimensional data and performance test results from your CNC trial batch can be directly transferred to final injection mold design, to avoid the common mistake of selecting gate locations that create uneven glass fiber orientation. The optimal gate location for this power tool handle is on the non-visible inner seam edge, right next to the motor housing mounting boss, which ensures glass fibers flow along the main vibration force direction during injection to maximize the handle's overall structural strength. This gate location will also eliminate the weld line that usually forms near the grip groove area, which is the most common root cause for crack failure on mass produced injection molded handles. The CNC machined golden sample you get from the qualified second trial batch can be used to pre-cut the electrode for EDM processing of the mold cavity, which reduces total mold manufacturing lead time by 4 days, giving you extra buffer for Q3 2026 mass production launch. **status:** suggested **Author:** Michael Wu **Date:** 2026-09-20 ### Answer 10 Modify your current CNC fixture to use 3 locating pins that lock directly into the pre-drilled inner mounting boss holes of the handle blank, instead of the standard fixture that clamps on the outer grip surface. This eliminates part deformation caused by excessive clamping force, which is a hidden root cause for the micro-crack defects you observed in the first batch. The new fixture also ensures every single part is aligned to the exact same datum during every machining step, so dimensional consistency across 500 units can stay within +/-0.05mm, well above your required tolerance level. Use climb milling instead of conventional milling for all finish cutting operations on the glass-filled PA66 material, which reduces material chipping on the groove edges by over 80% and creates a smoother surface finish that does not require any secondary hand polishing. The modified machining strategy will not add any extra per-unit machining cost, since it eliminates the extra polishing step previously required. **status:** suggested **Author:** Daniel Yang **Date:** 2026-09-20 ## Related Resources - [Plastic Components Q&A](https://www.ok-tool.com/qa/plastic-components/) - [Plastic Components](https://www.ok-tool.com/products/plastic-components/) - [Plastic Component Manufacturing Guide](https://www.ok-tool.com/manufacturing/plastic-components/) - [Plastic Components Buying Guides](https://www.ok-tool.com/buying/plastic-components/) - [Capabilities](https://www.ok-tool.com/capabilities/) - [Custom Manufacturing](https://www.ok-tool.com/custom-manufacturing/) - [Manufacturing Knowledge Base](https://www.ok-tool.com/knowledge/) - [Plastic Components](https://www.ok-tool.com/knowledge/plastic-components/) ## Structured Data ```json [ { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": "What tolerances apply to CNC machined power tool handles for electrical equipment?", "text": "I’m currently driving NPI trial validation for a 12V cordless drill power tool handle that is classified as an electrical equipment accessory, and we hit a major dilemma in our first 20-piece CNC machined trial batch last week. 7 of the 20 handles had visible misalignment when we assembled the trigger switch, and 3 failed the 100-hour continuous vibration test with micro-cracks at the grip groove edges. Our original plan was to use CNC machined handles to run 500 units of field validation before we cut the final injection mold, but the current defect rate is 50% which is way above our 5% acceptance threshold. We can’t push back the field test timeline by more than 10 days, and switching to a different CNC vendor will add too much rework cost. I need clear, actionable guidance on what the root causes are most likely to be, and which adjustments we can implement immediately to get the trial parts qualified without delaying the overall mass production schedule in Q3 2026.", "answerCount": 10, "upvoteCount": 6, "datePublished": "2026-09-20T13:03:59Z", "dateModified": "2026-09-20T13:04:11Z", "author": { "@type": "Person", "name": "Anonymous", "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html" } ,"acceptedAnswer": { "@type": "Answer", "text": "The core difference between CNC machined power tool handles for electrical equipment and standard generic CNC parts is that they have to balance three non-negotiable requirements: insulation performance, vibration resistance, and assembly precision that perfectly matches the rest of the electrical tool internal components. Unlike regular unmodified plastic CNC parts, power tool handle blanks are usually made of 30% glass-filled PA66, which has far higher cutting hardness, leading to uneven tool wear that causes the misalignment issues observed in the first trial batch. Most generic CNC shops apply a single full-cut process for these parts, which traps residual internal stress inside the cut profile that leads to hidden crack initiation points. The first immediate adjustment is to split the full CNC machining sequence into three independent steps. The first step is rough cutting that leaves a 0.2mm margin on all assembly mating surfaces and grip grooves, the second step is 24 hours of natural room temperature stress relief to release internal residual stress from profile cutting, the third step is finish cutting only the mating surfaces and grip grooves to final dimension. This adjustment eliminates over 90% of the micro-crack defects that appear during the vibration test. Lock the finish cutting feed rate at 80mm/min maximum for glass-filled PA66 handles to avoid localized material chipping that creates weak points under continuous vibration. For the trigger switch misalignment issue, the root cause is inconsistent datum reference across machining steps. Most CNC operations use the outer grip contour as the machining datum, but the actual functional assembly datum is the two internal mounting bosses that lock to the power tool motor housing. Switching the machining reference to these internal bosses will bring trigger alignment tolerance down from the current 0.3mm average to below 0.08mm, meeting the 95%+ assembly pass rate requirement. All parts in the second 20-piece validation run must be 100% checked with a custom go/no-go gauge for mounting boss position before any secondary processing . CNC machining is the most cost-effective process for this part for batch sizes between 50 to 2000 units, covering your full 500 unit field validation and even small initial market launch batches while the final injection mold is in production. For volumes above 2000 units, transition to injection molding for lower per-unit cost, and the CNC machined qualified trial parts can act as the golden dimensional sample for injection mold sign-off, reducing mold trial adjustment cycles by at least 2 rounds. Do not apply hand-applied surface texture on CNC machined grip surfaces for trial parts , as it will not match the etched texture on the final injection mold and generate misleading friction data during field testing.", "upvoteCount": 6, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#acceptedAnswer", "datePublished": "2026-09-20T14:21:32Z", "author": {"@type": "Person","name": "Amy Li","url": "https://www.ok-tool.com/team/amy.html"} } ,"suggestedAnswer": [ { "@type": "Answer", "text": "The end mill used for cutting glass-filled PA66 needs to be solid carbide with a diamond-like coating, instead of the standard high-speed steel end mill most general CNC shops deploy. High speed steel tools will wear down 0.05mm after 15 machined parts, creating gradual dimensional drift that causes the misalignment you observed at the 7th to 10th part in the first batch. The coated carbide end mill can hold consistent dimensions for up to 120 parts, removing the need for frequent tool changes that introduce human-induced dimensional error. When you later transfer validated dimensions to the injection mold, select P20 steel with 48-52 HRC hardness level, which supports at least 250,000 shot cycles for power tool handle production without frequent maintenance that breaks production consistency. Set the draft angle on the mold cavity to 1.5 degrees for glass-filled PA66 to avoid part ejection marks that ruin grip surface quality.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-2", "datePublished": "2026-09-20T14:17:56Z", "author": {"@type": "Person","name": "David Zhang","url": "https://www.ok-tool.com/team/david.html"} } , { "@type": "Answer", "text": "The 0.3mm position deviation on the trigger mounting feature you measured is not a single dimension error, it accumulates from four different mating points: the upper and lower handle shell seam, the motor housing mating face, the trigger pin groove, and the switch PCB mounting slot. When adjusting CNC machining dimensions, do not modify only one single dimension, map out the full tolerance stack chain and distribute the total allowable 0.1mm tolerance across all four features, with each individual feature holding a +/-0.025mm tolerance band. Add a 0.1mm adjustable shim at the PCB mounting position to absorb any remaining minor deviation, which will immediately raise the assembly first pass rate to over 98% even if there is small variation between individual CNC machined parts. When running the 500 unit field trial, pre-build the full assembly sequence with adjusted parts to confirm no hidden fit issues appear at higher volumes.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-3", "datePublished": "2026-09-20T14:03:09Z", "author": {"@type": "Person","name": "Olivia Chen","url": "https://www.ok-tool.com/team/olivia.html"} } , { "@type": "Answer", "text": "For the 500 unit field trial production, arrange the CNC machining process on two separate dedicated stations instead of one single machine running all steps. The first station handles all rough cutting and raw material preparation, the second station only runs finish cutting after the 24 hour stress relief period. This layout cuts total cycle time per part from 28 minutes to 19 minutes, so you can finish the full 500 unit batch within 7 working days without overtime, which fits your 10 day adjustment window. Add a simple material rack next to the CNC stations to place semi-finished parts horizontally after rough cutting, do not stack them vertically, as stacking introduces extra bending stress that leads to part warpage before finish cutting. Install a low-cost air blowing nozzle next to the cutting tool to clear away glass fiber dust during machining, which reduces surface scratch defects on the handle exterior.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-4", "datePublished": "2026-09-20T14:01:48Z", "author": {"@type": "Person","name": "Linda Xu","url": "https://www.ok-tool.com/team/linda.html"} } , { "@type": "Answer", "text": "Update your incoming and in-process inspection checklist to add three new mandatory checkpoints not included in your current document. First, 100% check residual dust and burr on all internal mounting bosses after machining, any burr larger than 0.03mm will break off during vibration testing and cause internal short circuit risks for the electrical equipment. Second, sample 3 parts from every 25 unit batch to run a 2 hour pre-vibration screening test, any part with dimensional shift over 0.05mm after the test should trigger a full batch check. Third, add a 1kV dielectric withstand test across the handle wall for every 10th part, to confirm the CNC cutting process does not create any thin wall spots that break the insulation requirement for electrical accessories. All non-conforming parts should be marked with a unique ID and segregated immediately, no unvetted parts can flow to the assembly line for trial runs.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-5", "datePublished": "2026-09-20T13:59:57Z", "author": {"@type": "Person","name": "Sophia Wang","url": "https://www.ok-tool.com/team/sophia.html"} } , { "@type": "Answer", "text": "The dimensional data you collect from CNC machined trial parts can be directly used to define the injection process window for final mass production parts. For 30% glass-filled PA66 material, set the melt temperature between 270 to 290 degrees Celsius, mold temperature at 85 degrees Celsius, and holding pressure at 70% of the maximum injection pressure to minimize warp and sink mark defects. The micro-crack issues you encountered on CNC parts will not appear on properly processed injection molded parts, as the injection process creates continuous glass fiber orientation that distributes vibration stress evenly across the full part, instead of the broken glass fiber ends exposed on CNC machined surfaces that act as crack initiation points. Reference assembly fit data from CNC trial batches to adjust the injection cooling time, to ensure post-molding shrinkage of the handle falls within the acceptable tolerance band for trigger switch assembly.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-6", "datePublished": "2026-09-20T13:56:12Z", "author": {"@type": "Person","name": "Emily Chen","url": "https://www.ok-tool.com/team/emily.html"} } , { "@type": "Answer", "text": "Review your current handle 3D design file to add 0.5mm radius fillets on all grip groove edges that had micro-crack failure during vibration testing. The original sharp 90 degree corner on the groove creates a stress concentration point that amplifies vibration force by over 3 times during regular power tool operation, and even CNC machined parts with perfect dimensional accuracy will still crack after extended running time. Adjust the wall thickness of the handle main body to a uniform 3.2mm across all sections, eliminating the 2.4mm thin wall section at the trigger mounting position that caused inconsistent cutting deflection during CNC machining. Adding 1 degree extra draft angle on all internal vertical walls will not affect assembly performance of CNC machined trial parts, but will significantly reduce tool wear during the cutting process and extend the service life of your end mills.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-7", "datePublished": "2026-09-20T13:46:56Z", "author": {"@type": "Person","name": "Eric Zhao","url": "https://www.ok-tool.com/team/eric.html"} } , { "@type": "Answer", "text": "Re-align your current project milestones to split the remaining 10 day window into three clear phases, with no overlapping tasks to avoid delays. The first 3 days are reserved for CNC process adjustment and second 20-piece trial part production, the next 2 days are for full dimensional, assembly and vibration testing to confirm all defects are resolved, the remaining 5 days are for full 500 unit CNC batch production and pre-delivery preparation. Submit all dimensional modification documents and test reports to the cross-functional team for formal written sign-off on day 5, so no unplanned design change request comes in the later phase that eats into your reserved timeline. Arrange a 15 minute daily standup sync with the CNC operation team, assembly team and quality team to track defect rates in real time, and escalate any unexpected issue within 1 hour of detection to avoid accumulated delays.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-8", "datePublished": "2026-09-20T13:19:40Z", "author": {"@type": "Person","name": "Kevin Liu","url": "https://www.ok-tool.com/team/kevin.html"} } , { "@type": "Answer", "text": "The validated dimensional data and performance test results from your CNC trial batch can be directly transferred to final injection mold design, to avoid the common mistake of selecting gate locations that create uneven glass fiber orientation. The optimal gate location for this power tool handle is on the non-visible inner seam edge, right next to the motor housing mounting boss, which ensures glass fibers flow along the main vibration force direction during injection to maximize the handle's overall structural strength. This gate location will also eliminate the weld line that usually forms near the grip groove area, which is the most common root cause for crack failure on mass produced injection molded handles. The CNC machined golden sample you get from the qualified second trial batch can be used to pre-cut the electrode for EDM processing of the mold cavity, which reduces total mold manufacturing lead time by 4 days, giving you extra buffer for Q3 2026 mass production launch.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-9", "datePublished": "2026-09-20T13:11:09Z", "author": {"@type": "Person","name": "Michael Wu","url": "https://www.ok-tool.com/team/michael.html"} } , { "@type": "Answer", "text": "Modify your current CNC fixture to use 3 locating pins that lock directly into the pre-drilled inner mounting boss holes of the handle blank, instead of the standard fixture that clamps on the outer grip surface. This eliminates part deformation caused by excessive clamping force, which is a hidden root cause for the micro-crack defects you observed in the first batch. The new fixture also ensures every single part is aligned to the exact same datum during every machining step, so dimensional consistency across 500 units can stay within +/-0.05mm, well above your required tolerance level. Use climb milling instead of conventional milling for all finish cutting operations on the glass-filled PA66 material, which reduces material chipping on the groove edges by over 80% and creates a smoother surface finish that does not require any secondary hand polishing. The modified machining strategy will not add any extra per-unit machining cost, since it eliminates the extra polishing step previously required.", "upvoteCount": 0, "url": "https://www.ok-tool.com/qa/cnc-machining-tolerances-power-tool-handles.html#suggestedAnswer-10", "datePublished": "2026-09-20T13:04:11Z", "author": {"@type": "Person","name": "Daniel Yang","url": "https://www.ok-tool.com/team/daniel.html"} } ] } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.ok-tool.com/"},{"@type": "ListItem", "position": 2, "name": "Q&A", "item": "https://www.ok-tool.com/qa/"},{"@type": "ListItem", "position": 3, "name": "Plastic Components Q&A >", "item": "https://www.ok-tool.com/qa/plastic-components/>"} ,{"@type": "ListItem", "position": 4, "name": "What tolerances apply to CNC machined power tool handles for electrical equipment?"} ] } ] ```