CNC Machining
Dowel Alignment for Motor End Covers: Control Location and Assembly
Specify locating pins, mating holes and datum relationships so end covers assemble consistently without unnecessary restraint.
Tom Yang
CNC Manufacturing Content Contributor · WEKO OEMTom Yang writes practical manufacturing guides for engineers and procurement teams sourcing drawing-based CNC parts. His work focuses on supplier evaluation, production planning, materials, tolerances, DFM, dimensional inspection, quality control and overseas sourcing risk.
Tom Yang 专注于 CNC 加工、海外供应商审核、材料与公差、DFM、质量控制以及从图纸到生产的制造流程内容，为海外工程和采购团队提供实用参考。
AUTHOR ARTICLES
Engineering insights by Tom Yang
CNC Machining
Cooling Fins on CNC Motor Housings: Balance Heat and Tool Access
Review fin spacing, stiffness, root geometry and thermal interfaces before releasing a machined motor housing.
Quality Control
First-Article Reports for Motor End Covers: Make Results Traceable
Connect each drawing requirement to the inspected part, final process condition and supporting measurement evidence.
Quality Control
Cross-Hole Burrs in Machined Motor Parts: Build an Inspection Plan
Control hidden burrs at intersecting passages with defined edge requirements, accessible inspection and validated removal.
Product Knowledge
O-Ring Sealing Surfaces on Machined Covers: Specify More Than Ra
Define the sealing track, groove geometry, surface texture and inspection method before approving a machined cover.
Product Knowledge
Galvanic Corrosion at Motor Housing Fasteners: Review the Whole Joint
Assess moisture paths, dissimilar-metal contact and coating continuity around aluminum housing fasteners.
Product Knowledge
Threaded Inserts in Aluminum Parts: Specify the Complete Installation
Choose inserts around engagement, surrounding material, installation access and final thread inspection.
CNC Machining
Thin-Wall Motor Housings: Design the Clamping Plan Before Machining
Reduce housing distortion by reviewing contact area, machining sequence and free-state inspection before release.
Quality Control
Motor Shaft Runout: Define the Datum Before Choosing the Gauge
Separate shaft size, form and runout, and use a measurement setup that represents the motor assembly.
CNC Machining
Bearing Fits in Aluminum Motor Housings: Plan for Temperature
Choose housing fits using the bearing, load, temperature and final surface condition, then verify the assembled result.
Quality Control
How to Verify a CNC Supplier’s Metrology Capability: CMM vs Hand Tools
Match calipers, bore gauges and CMMs to the feature, tolerance and datum system, then verify calibration, uncertainty and method correlation.
CNC Machining
CNC Prototype MOQ and Setup Fees: What Buyers Should Expect
See how CNC engineering, programming, fixtures and inspection affect pricing at 5, 50 and 500 pieces, using a clearly labeled cost example.
Quality Control
Nonconforming CNC Parts: Containment, Root Cause and Supplier Recovery
Contain nonconforming CNC parts, align measurement methods, prove occurrence and escape causes, and close recovery with effectiveness evidence.
Product Knowledge
CNC Surface Finishes: Anodizing, Passivation and Powder Coating
Compare anodizing, passivation and powder coating by substrate, protection, thickness, cost and the effect on critical machined interfaces.
CNC Machining
DDP vs FOB vs EXW for CNC Parts: Cost, Control and Risk Compared
Compare EXW, FCA, FOB and DDP under Incoterms 2020 using risk transfer, customs responsibilities and an illustrative landed-cost example.
Product Knowledge
Aluminum 6061 vs 7075 for CNC Structural Parts
Compare typical 6061-T6 and 7075-T6 properties, cost drivers, joining and corrosion considerations for machined structural parts.
CNC Machining
12 CNC DFM Mistakes That Increase Machining Cost—and How to Fix Them
The most expensive drawings often contain unnecessarily tight tolerances, deep pockets, tiny internal radii, thin walls and hard-to-reach features.
CNC Machining
How to Protect CAD Files and IP When Outsourcing CNC Machining to China
Protect machining drawings through limited disclosure, controlled revisions, subcontractor approval and project-specific confidentiality terms.
CNC Machining
Custom CNC Parts from China: A Realistic Lead-Time and Shipping Plan
Build a CNC delivery schedule around engineering approval, material, production, finishing, inspection and a named freight route.
Quality Control
How to Verify Material Authenticity and Mill Test Certificates for CNC Parts
Check material certificates, heat numbers, stock identity and verification methods to distinguish documented alloy and temper from unsupported claims.
CNC Machining
CNC Machining Tolerances in Mass Production: What Is Realistic?
Understand realistic CNC tolerance planning, functional features, measurement agreement and process drift before committing to mass production.
CNC Machining
Chinese Factory or Trading Company? How to Verify Your CNC Supplier
Verify the legal identity, actual production site and subcontracting controls behind a CNC quotation before placing a representative pilot order.
Quality Control
How to Audit an Overseas CNC Machine Shop: A Buyer’s 12-Point Checklist
Use twelve practical audit checks to examine CNC supplier identity, traceability, measurement, capacity, corrective action and production release.