Precision CNC Machining & Custom Machining Services — Engineer-Led, ±0.005mm CMM-Verified
CNC milling, turning, and 5-axis machining from a Dongguan factory built on 20+ years of mold-engineering DNA. Send STP, IGS, X-T, or PDF—an engineer (not a sales rep) returns a written quote with DFM feedback within 24 hours.
One factory. CNC Milling + Turning + EDM. Quote in 24 h.
Four CNC Sourcing Risks Every Buyer Should Price In Before the PO
Most CNC orders don't fail at the spindle. They fail in the handoffs—between what was quoted, what was machined, and what got reported back. Four patterns repeat across the industry. Knowing them turns the RFQ into your real quality gate.
Lead-time slippage that surfaces too late.
Quote says 12 working days. By day 18 the part hasn't shipped and your assembly window is exposed.
The fix isn't faster machines—it's a supplier who flags slippage the day it happens. We send a written Friday update on every open job, plus same-shift notice if a tool breaks or material verification fails.
Quiet tolerance changes on the shop floor.
A mating-surface tolerance gets opened up because it was "hard to hold." A wall thickness drifts because of chatter. Any change to a critical dimension belongs to the design owner.
On our floor, no GD&T callout is modified without your written sign-off—before the cut, not after.
Inspection data that isn't traceable.
Phone photos of a caliper next to a part are not a dimensional report. For fits, GD&T callouts, and locating surfaces, you need CMM coordinates tied to drawing balloon numbers.
That report ships with every order, standard.
MOQ walls on small runs.
Twenty stainless brackets, twelve replacement shafts—most production shops won't quote under 500.
We run from 1 piece on the same inspection standard, and setup economics are itemized in the quote, not buried.
Want to see how your drawing prices out? The fastest answer is a quoted definition of what precision CNC machining actually delivers—that's next.
What is Precision CNC Machining?
Precision CNC machining is a subtractive process where computer-controlled machines remove material from a solid metal billet to hold tolerances as tight as ±0.005mm. CNC machining centers run across three configurations:
3-Axis Milling
Prismatic housings, plates, brackets
4-Axis Milling
Indexed features and rotational parts
5-Axis Simultaneous Milling
Complex aerospace and medical geometry in one setup
How those axis configurations map across each service line is next.
CNC Machining Services
CNC machining services cover the full subtractive workflow—first-article prototype through 10,000-piece runs—completed in-house. Every job starts with a written DFM review before the spindle turns.
CNC Milling (3/4/5-Axis)
Multiple CNC machining centers with spindle speeds to 12,000 rpm cut aluminum, stainless, brass, copper, titanium, and engineering plastics. The 5-axis cells finish aerospace brackets and medical fixtures in one setup, removing the stack-up error that comes from re-fixturing on 3-axis equipment—and holding ±0.005mm on critical features.
CNC Turning
Lathe work covers shafts, bushings, and rotational housings up to 320mm diameter. Live tooling adds cross-drilling and milled flats in the same operation, cutting cycle time on hybrid geometry.
CNC Lathe Machining
CNC lathe machining produces shafts, pins, and connectors in 303/304 stainless, brass C36000, and 6061 aluminum, with finishes to Ra 0.4 on bearing diameters. Runout under 0.01mm TIR. Material certificates ship with every batch.
CNC Mill-Turn Machine
A Mill-Turn Machine is a high-end multi-tasking precision CNC machining tool that combines CNC turning and milling functions into one platform. With 5-axis simultaneous motion, dual spindles, a B-axis swivel head, and driven tool turrets, it completes multi-face machining in a single setup—eliminating re-clamping errors, ensuring superior concentricity and precision, and significantly shortening process chains. This makes it ideal for complex, high-precision parts in aerospace, medical, automotive, and energy industries, delivering enhanced productivity, lower fixture costs, and flexible small-batch, multi-variety production. Mill-turn technology represents the future of smart, integrated precision manufacturing.
CNC Drilling, Tapping & EDM
For internal features standard mills can't reach, our Sodick mirror EDM delivers sharp inner corners and Ra 0.2 on hardened stainless. Threads tapped to ISO metric or UNF, plug-gauge verified. Our precision cnc machining services also extend to mold components—mold base, cavity/core inserts, ejector pins.
→ /mold-components/
Have a drawing ready? Upload STP/IGS/X-T/PDF—an engineer replies in 24 hours.
Get My CNC QuoteCustom Machining Services for Every Industry
KTM's custom machining services run across four verticals where dimensional control and traceability decide whether a part ships or scraps. Send a drawing—engineers review the same day and quote within 24 hours, from a single prototype to lots of 10,000+ with no MOQ.
Automotive Custom Machined Parts
Sensor housings, mirror brackets, ventilation components, safety-buckle bodies, light-strip housings. Most automotive work ships in 6061-T6 aluminum or 304 stainless with anodized or passivated finishes. Features tighter than ±0.02mm route to the 5-axis cells for single-setup machining.
Aerospace & Aviation Components
Cabin lock mechanisms, structural fittings, seat-belt anchor parts in 7075-T6 aluminum or 17-4PH stainless. Aerospace lots ship with material certificates and CMM reports on every critical feature called out on the drawing, packaged per AS9100-aligned handling even when full AS9100 isn't specified.
Medical Device Machining
Surgical instrument bodies, clamps, fluid-path housings in 316L stainless and PEEK. Parts ship with passivation per ASTM A967, optional Ra 0.4 mirror polish, and full dimensional records for your DHR file. Lot-level traceability is enforced from billet receipt through final pack-out.
Industrial Machinery Parts
Dairy and poultry processing brackets, automation jigs, robotic gripper jaws, conveyor wear parts. These are recurring custom machining services we've supplied to industrial OEMs across the EU and North America for two decades, typically in stainless and engineering plastics. Material choice is the variable that decides tool path, finish, and cost on every one of these parts—which is where the next section opens.
Materials We Machine
Material selection drives cost, lead time, and tool strategy more than any other variable on a CNC drawing. We hold working stock or source direct from mill across six material families, with certificates traceable to heat number on every shipment.
Aluminum CNC Machining (6061/6082/7075)
| Grade | Tensile | Machinability | Best For |
|---|---|---|---|
| 6061-T6 | 310 MPa | Excellent | Housings, fixtures, general structural |
| 6082-T6 | 340 MPa | Excellent | EU automotive spec |
| 7075-T651 | 572 MPa | Good | Aerospace brackets, fatigue-critical |
Aluminum cnc machining is our highest-volume material family—roughly half our monthly chip volume. We hold ±0.02mm on milled features and ±0.01mm on turned diameters. For thin walls under 1.0mm we adjust step-down and feed rate to control deflection. Aluminum cnc machining parts finish with clear, black, or color anodizing per MIL-A-8625.
Stainless Steel Machining (304/316/17-4PH)
| Grade | Profile | Typical Application |
|---|---|---|
| 304 | General corrosion, work-hardens fast | Food, fasteners, industrial |
| 316L | Chloride/autoclave resistant | Medical, marine, pharma |
| 17-4PH | Hardenable above 38 HRC | Aerospace, valve, tooling |
Stainless steel machining runs lower spindle speeds with flood coolant to manage work hardening—without that, you get surface glaze that causes downstream tool wear and dimensional drift. Finishes from as-machined to Ra 0.4 mirror polish. Passivation per ASTM A967 available with mill certificates attached at shipment.
Brass Machined Components (C36000/C26000)
Brass machined components in C36000 free-machining and C26000 cartridge brass cover electrical contacts, fluid fittings, and connector bodies. We hold ±0.01mm on turned diameters, parts cleaned, deburred, and packaged for direct assembly.
Copper, Titanium & Engineering Plastics
C11000 copper busbars for electrical contacts. Ti Grade 2 and Ti-6Al-4V for aerospace and medical-adjacent work—cut at 30–40 m/min with high-pressure coolant to pull heat off the tool tip, holding ±0.01mm consistently. PEEK, POM, PC, ABS, HDPE dry-machined where coolant absorption would affect dielectric or biocompatibility properties. Plastics over 80mm get 100% post-machining dimensional verification because thermal recovery matters.
Learn more about CNC plastic machining ���
Surface Finishing for Machined Parts
After machining, parts route to:
These finishing cnc machining services are managed through long-term qualified partners audited to KTM's QC standard. First-article approval is required from us and from you before any batch release, and every finished lot returns to our inspection room for final dimensional and visual check before shipment.
Consistency across material and finish only matters if it holds across the lot—which is where small-batch economics either work or break.
Small Batch & Low Volume CNC Machining—From 1 Piece to 10,000
| Type | Quantity | Use case | Cost driver |
|---|---|---|---|
| Small Batch | 1–50 pcs | Design validation, legacy spares | Setup dominant (40–50%) |
| Low Volume | 50–500 pcs | Pilot launch, bridge production | Setup amortized (~25%) |
| Production | 500–10,000+ | Serial supply | Material + production time |
Small batch cnc machining at KTM has no MOQ—we quote from 1 piece for design validation through 10,000+ for steady-state. Tiered pricing is published on the quote, so you see exactly where unit cost breaks at 10/100/1,000 pieces before you commit.
For low volume cnc machining, every part in your lot runs on the same machine, same tool, same program. That's the only way to guarantee dimensional consistency without falling back on statistical sampling. Programs and fixtures are retained 24 months—repeat POs skip programming and go straight to chip, which typically drops reorder lead time by 20–30%.
Because our founder runs both the CNC floor and the mold floor, small batch cnc machining at KTM doubles as upstream DFM for your future tool. If your part is heading to injection molding at higher volumes, we flag draft angles, wall thickness, and gate locations during the prototype run—issues that cost USD 3,000–15,000 to correct in hardened steel later, caught at the billet stage instead.
Consistency from 1 to 10,000 only matters if you can verify it—which is what the next section is built around.
Quality Control & Tolerances You Can Verify
Every part shipped from KTM carries three documents and passes through a four-stage inspection chain. Nothing leaves the floor on operator judgment alone.
| Class | Spec | Verified On |
|---|---|---|
| Standard | ±0.05mm | Micrometer, caliper |
| Precision | ±0.02mm | Height gauge, 2D projector |
| High Precision | ±0.005mm | CMM |
Tolerance class is confirmed in writing during the quote stage—no assumptions at first-article approval.
Inspection Equipment & Reports
Each batch moves through first-article inspection → in-process sampling → final inspection. Our metrology floor uses CMM for critical dimensions and a 2D projector for profile checks, supported by micrometer, vernier caliper, height gauge, pin gauge, plug gauge, thread gauge, and hardness tester for routine measurement.
Dimensional Inspection Report
tied to drawing balloon numbers
Material Certificate (EN 10204 3.1)
traceable to mill heat number
CMM Report
covering the critical dimensions you flag on the print
Records retained two years—if a downstream audit asks for a 2024 batch, we can produce it.
Behind the inspection floor sits the reason engineers trust the numbers in those reports.
Why Engineers Choose KTM for Precision CNC Machining
KTM delivers precision cnc machining and custom machining services from a factory run by a mold engineer, not a sales founder. Our founder graduated in mold design and manufacturing, spent 20+ years on the shop floor, and still leads technical reviews on every difficult job.
Mold-DNA on the CNC Floor
Most CNC shops machine the geometry on the drawing and stop there. Because we also build injection and die-casting molds in the same factory, our engineers read your CNC drawing for downstream risk: draft angles, wall thickness, sharp internal corners, undercuts. If your prototype is heading toward production tooling, we flag mold-related issues at the CNC stage and save the cost of a steel revision later.
Engineers Talk to Engineers
Your contact is an English-fluent project engineer with 5–10 years of mold and CNC experience. Video calls go directly to the people running your job. Technical questions reach the founder or a senior tool maker within 24 hours—not a sales relay.
Transparent Pricing, No Mid-Project Increases
Quotes are itemized by setup, machining time, material, and finishing. The number you approve is the number you pay. The only line item that can change after PO is a customer-initiated drawing revision—and the cost delta is sent in writing for approval before machining resumes.
Long-Tenure Accounts
Our oldest active customer placed their first order over 15 years ago. A German hydraulics OEM has reordered brass manifolds quarterly since 2014. A US medical device buyer has run Ti-6Al-4V components through us since 2018. They stayed because the part they specified is the part that arrives.
That discipline shows up in how the work moves from your drawing to your dock.
Our 6-Step CNC Machining Workflow
Step 1—RFQ Submission
STEP, IGS, X-T, or annotated PDF goes to an engineer, not a sales rep. NDA signed first on request.
Step 2—24-Hour Engineering Review & Quote
Full quote with material grade, tolerance commitment, finish, lead time, and unit price line by line. Thin walls, unreachable corners, or no-function tolerances flagged before you confirm.
Step 3—Order Confirmation & Deposit
Final drawing revision, lead time, and Incoterm locked in writing. Programming and fixturing start the same day.
Step 4—Production with Weekly Progress Reports
Written Friday update on every open job: operations done, operations next, current dimensional status, open questions. Problems surface in week one, not at shipment.
Step 5—In-Process & Final Inspection
Operators check critical dimensions at set intervals; QC verifies on the CMM before any part leaves the floor.
Step 6—Cleaning, Packaging, Shipment
Small parts in pearl cotton + double-wall carton; heavy or cosmetic parts in pearl cotton + wooden crate. EXW, FOB, or DDP—your choice.
Step 1—RFQ Submission
STEP, IGS, X-T, or annotated PDF goes to an engineer, not a sales rep. NDA signed first on request.
Step 2—24-Hour Engineering Review & Quote
Full quote with material grade, tolerance commitment, finish, lead time, and unit price line by line.
Step 3—Order Confirmation & Deposit
Final drawing revision, lead time, and Incoterm locked in writing.
Step 4—Production with Weekly Progress Reports
Written Friday update on every open job.
Step 5—In-Process & Final Inspection
QC verifies on the CMM before any part leaves the floor.
Step 6—Cleaning, Packaging, Shipment
EXW, FOB, or DDP—your choice.
Six steps backed by shipped work—including the most recent precision cnc machining services projects off our floor.
Recent Precision CNC Machining Projects
Three recent jobs that reflect the kind of work we run every year:
Automotive Tier-1
Sensor housings · 6061-T6, black anodized · 4,500 pcs · CMM-verified ±0.02mm
Medical Device OEM
Surgical instrument bodies · 316L stainless · 600 pcs · Ra 0.4 mirror polish
Industrial Automation
5-axis robotic gripper jaws · 7075-T6 · 280 pcs · ±0.015mm on mating features
Send the print and we'll quote a parallel job within 24 hours.
Talk to our engineer team, Get a real DFM review with your quote.
Send DrawingsFrequently Asked Questions
When you're ready, the next step is one upload away.
Get Your Precision CNC Machining Quote in 24 Hours
Send the drawing. An engineer (not a sales rep) replies within 24 hours with pricing, lead time, and DFM notes. NDA on request. No MOQ. ±0.02mm standard tolerance, ±0.005mm on critical features.