01
Thickness drifts across the lot
Parts arrive at 1.08 mm on one end of the box and 0.94 mm on the other. Your press shims change every run and the assembly height moves. Sorting 10,000 pieces by hand costs more than the parts.
CNC machined 25mmx1mm metal slug
25mmx1mm Metal Slug: From Blank to Finished CNC Part
GreatLight machines the 25mmx1mm metal slug into finished components on 127 CNC machines in Dongguan. Tolerance ±0.005 mm, 100% inspection before shipment, and runs from one piece to 10,000+ parts.
±0.005 mmØ25 × 1 mm blank3–5 day shippingNo MOQ
127High-precision CNC machines
±0.005 mmAchievable tolerance
15 yearsManufacturing since 2011
99.99%Qualification rate
Where it goes wrong
What a Bad Slug Lot Costs You
A 25 mm disc that is 0.05 mm thick or 0.1 mm oval will not sit flat in your fixture.
02
Burrs on the rim
A rolled edge stops the slug from seating flat. Operators spend time filing each disc, or the part sits proud and the stack tilts. Deburring has to be in the process, not an afterthought.
03
Diameter runs oval
If the Ø25 mm circle turns out 0.08 mm out of round, an automatic feeder jams. The machine stops. Someone clears it. This repeats all shift.
04
No material certificate
Your customer asks for 304 or 6061 traceability and the supplier sends a packing slip. Without a mill cert and inspection report, the batch cannot ship.
How we make it
Turning a 25mmx1mm Metal Slug Into a Finished Part
One page, one part family: flat round blanks near Ø25 × 1 mm, machined to your drawing.
Blank preparation
Stock Cut, Faced, and Held Flat
We start from bar, plate, or pre-cut slug stock and face both sides on a lathe or mill-turn center. Holding a 1 mm thick disc flat is the whole problem. Thin parts deflect under clamping pressure and spring back when you release them. We use soft jaws, vacuum fixturing, or a sacrificial carrier plate depending on the feature pattern.
Once the blank is stable, we machine the OD, any bore, chamfers, and face features in the same setup where possible. Fewer setups means fewer chances for the part to move between operations.
- 1Facing and thickness controlParallel faces held to ±0.005 mm on thickness.
- 2Soft jaws and vacuum platesClamping force spread so a 1 mm disc does not bow.
- 3OD and bore in one setupConcentricity stays inside the same datum.
Machining and inspection
Features Cut to ±0.005 mm, Then Measured
The slug goes onto a 3-axis, 4-axis, or 5-axis mill depending on the feature count. A single hole and chamfer is a 3-axis job. A ring of holes on a bolt circle, or features on both faces, belongs on a 4-axis or 5-axis machine so the part is not re-clamped. Our shop runs 16 simultaneous 5-axis centers and 16 mill-turn centers for exactly this kind of small, near-net part.
Inspection is not a final step only. We check the raw material certificate on arrival, monitor thickness and diameter in process, and inspect 100% of parts before shipment. Reports are available on request.
- 15-axis for multi-face featuresHoles, slots, and chamfers without re-fixturing.
- 2In-process gaugingThickness and OD checked while the run is still open.
- 3100% final inspectionEvery part checked, not a sample.
Selection guide
Which Process Fits Your 25mmx1mm Metal Slug
Pick by feature count and volume, not by habit.
| Situation | Recommended process | Why |
|---|---|---|
| Plain disc, tight thickness | CNC turning or mill-turn | Faces come parallel in one setup |
| One center hole and chamfer | 3-axis milling | Short cycle, simple fixture |
| Bolt circle or side features | 4-axis or 5-axis milling | No re-clamping between faces |
| Thin disc, tight flatness | Vacuum fixture on 5-axis | Even clamping, less deflection |
| Prototype, 1 to 20 pcs | Mill or lathe, no tooling | No minimum order quantity |
| Volume 10,000+ pcs | Mill-turn with bar feeder | Lower cost per part |
What we run
Machining Services for Small Precision Parts
The same shop floor handles the slug and everything around it.
01
5-Axis CNC Machining
16 simultaneous 5-axis centers. Multi-face features on one part without moving the datum. Fits slugs with holes on more than one face.
02
CNC Milling & Turning
3-axis, 4-axis, and mill-turn capacity. Ø400 mm rotary table for bolt circles. Turning for round slugs with a bore.
03
Rapid Prototyping
One to twenty pieces, no tooling charge. Good for checking fit before committing to a 10,000 piece run.
04
Surface Finishing
Anodizing, electroless nickel, zinc plating, black oxide, bead blasting, and laser marking from 1.5 mm character height.
05
Sheet Metal Fabrication
For flat parts that start as sheet rather than bar. Bending, punching, and hardware insertion.
06
Metal Die Casting
When the slug becomes a housing or bracket at higher volume, we can quote casting plus machining.
Capability ranges
Shop Capacity and Material Coverage
Numbers you can plan a purchase order around.
| Item | Range | Notes |
|---|---|---|
| Maximum part size | 4,000 mm | Larger travels on select machines |
| Achievable tolerance | ±0.005 mm | ±0.0002 in |
| Surface finish | Ra 0.2–3.2 μm | As-machined to fine |
| Aluminum | 6061, 6082, 7075, 2024 | Plus 5052, 5083, 6063, ADC12 |
| Stainless | 303, 304, 316L, 17-4PH | Plus 420, 430, 440C |
| Copper and brass | C101, C110, C36000 | Beryllium copper available |
| Titanium and special | TC4, Inconel, AZ31B | TA1, TA2, AZ91D |
| Plastics | POM, PEEK, PA, HDPE | ABS, PC, PMMA, PP |
Why GreatLight
Reasons Engineers Keep Sending the Same Part Back
±0.005
Tolerance We Will Sign For
We quote the tolerance we can hold across the lot, not the best single part off the machine. If your drawing needs tighter than that, we say so before the run starts.
12 h
Quote and DFM in 12 Hours
Send a drawing and we return a quotation plus a free DFM analysis within 12 hours. Production can start within 24 hours of approval.
100%
Inspection on Every Part
Raw material check, in-process monitoring, and 100% final inspection before shipment. Reports on request, not on request only after a problem.
4
Certifications in Place
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016, and ISO 27001:2022. Your drawings stay under NDA on request.
0
No Minimum Order Quantity
One prototype and a 10,000 piece run use the same process sheet. No tooling charge for the first small batch.
7,600 m²
Three Plants, One Process
Three wholly-owned plants in Dongguan and a factory in Singapore. 150 technicians on the floor.
127CNC machines on site
150Technicians
3–5 daysTypical part shipping
<2%Historical late-delivery rate
Where the part goes
Industries and What They Require
Automotive and EV
Sensor shims and spacer discs that must repeat run to run. IATF 16949 process control applies.
- ±0.005 mm
- IATF 16949
- 100% inspection
Medical Devices
Flat discs for instrument assemblies. Material traceability and clean deburring matter more than speed.
- ISO 13485
- Mill cert
- Deburred edges
Electronics
Contact discs and heat-spreader blanks in copper and aluminum. Flatness drives thermal contact.
- C110 copper
- Ra 0.8–1.6 μm
- Flatness held
Robotics and Automation
Feeder and gripper discs where an oval OD jams the line. Diameter consistency is the whole spec.
- Roundness held
- No burrs
- Lot consistency
FAQs
Questions Engineers Ask About 25mmx1mm Metal Slugs
What does 25mmx1mm mean exactly, and does it fit my drawing?
It describes a flat round blank roughly Ø25 mm across and 1 mm thick. That is a common starting size, not a fixed standard.
If your part is 24.6 mm or 25.4 mm, we machine to your drawing. Send the dimension and tolerance you actually need and we quote against that.
Can you hold ±0.005 mm on a 1 mm thick disc?
Yes, on thickness, diameter, and machined features, provided the fixture controls deflection. Thin parts move when clamping pressure is uneven.
That is why we use soft jaws, vacuum plates, or a carrier plate. If the geometry makes ±0.005 mm unrealistic, we tell you before the run, not after.
Which materials can you machine from slug stock?
Aluminum 6061, 6082, 7075, and 2024; stainless 303, 304, 316L, and 17-4PH; copper and brass including C110 and C36000; titanium TC4; and plastics such as POM and PEEK.
Beryllium copper and Inconel are also available. Tell us the material on the drawing and we confirm stock before quoting.
Is there a minimum order quantity?
No. We run from one prototype to 10,000+ piece runs on the same process sheet.
Small batches go on the mill or lathe without tooling. Higher volumes move to mill-turn with bar feeding to cut cost per part.
How do you handle burrs on a thin disc?
Deburring is planned into the process, not added at the end. We control the chamfer or edge break in the cut where the geometry allows.
For softer materials we follow with tumbling or bead blasting. Every part is checked for a rolled edge before packing.
What inspection data comes with the shipment?
Raw material certificates are checked on arrival. Thickness and diameter are monitored in process, and 100% of parts are inspected before shipment.
Dimensional reports, material certificates, and first article inspection reports are available on request.
How fast can I get parts?
Quotation and free DFM analysis come back within 12 hours. Production can start within 24 hours of approval, and parts typically ship in 3–5 days.
Lead time depends on material availability and finishing. Anodizing or plating adds a step outside the machine shop.
Will you sign an NDA before I send drawings?
Yes. We sign an NDA on request, and uploads are kept secure and confidential by default.
We hold ISO 27001:2022 for information security, which covers how we store and handle customer files.
Send Your 25mmx1mm Metal Slug Drawing
Upload the file and we return a quotation with DFM feedback within 12 hours. No minimum order quantity, no tooling charge for the first batch.
12-hour quote100% inspectionNo MOQNDA on request
