Square Flange Brake Shaft Seat in 7075-T6, Ø13 and Ø16.5 g6
7075-T6 brake shaft flange mount: Ø13 g6 and Ø16.5 g6 journals, Ø32 flange, 25 +/-0.02 square, PCD Ø20.5 +/-0.1 with 8X Ø2.4 through, hard anodize 0.1 mm, RoHS 2.0. Quote in 24 hours.

General Industrial Components
A square flange shaft seat for 20 series brake assemblies, with g6 class journals, a dense bolt circle, and hard anodize verified after treatment.
Or email drawings to kgl@kglmfc.com
Key Specifications
| Parameter | KGL Capability |
|---|---|
| Material | Aluminum 7075-T6 |
| Process | CNC turning of journals and bore, CNC milling of the square flange, drilling of the PCD pattern, edge breaking, hard anodize film 0.1 mm |
| Journals | Ø13 g6 (-0.006/-0.017), Ø16.5 g6 (-0.006/-0.017), Ø15, Ø12 |
| Flange | Ø32 (-0.1), square 25 +/-0.02 x 25 (-0.02/-0.05), parallelism 0.02 |
| Bolt circle | PCD Ø20.5 +/-0.1, 8X Ø2.4 through, 4X Ø1.9 (+0.09/+0.03) |
| Lengths | 24.3 / 17.3 / 14.8 |
| Finish | Hard anodize 0.1 mm, RoHS 2.0 |
| Inspection | Pin gauges, micrometer and caliper, CMM on parallelism and perpendicularity, film thickness meter, appearance |
| Tolerance | ±0.005 mm standard on metals, engineering plastics, and carbon fiber composite |
| Certifications | ISO 9001:2015, ISO 13485:2016, AS9100D |
| Capacity | 100+ CNC machines including 11 five-axis centers |
| MOQ | No MOQ; 1-piece prototypes supported |
| Quote | Within 24 hours for complete 2D/3D files |
About This Part
This flange mount seats the 20 brake shaft: journals at Ø13 g6 and Ø16.5 g6, both minus 0.006 to minus 0.017, over a 24.3 mm stacked length with 17.3 and 14.8 steps. The Ø32 minus 0.1 flange runs to a 25 plus or minus 0.02 by 25 minus 0.02 minus 0.05 square with parallelism at 0.02 and perpendicularity controlled.
The bolt circle carries 8X Ø2.4 mm through holes on PCD Ø20.5 plus or minus 0.1 plus 4X Ø1.9 +0.09/+0.03 holes, with the 0.82 plus or minus 0.01 thickness at the flange face. Hard anodize at 0.1 mm film goes on after machining, with drawing tolerances verified post treatment and RoHS 2.0 conformity.
Inspection is thread and pin gauges, micrometer and caliper, CMM on parallelism and perpendicularity, film thickness meter, and appearance.
This part family supports the Industrial Parts industry. Read how KGL machines parts for that sector, then send your drawing for a quote.
Why Machine It at KGL
Five-Axis Fleet
100+ CNC machines including 11 five-axis centers run complex geometry in single setups, so tolerances do not stack up across refixturing.
Verified Accuracy
±0.005 mm standard on metals, plastics, and carbon fiber composite, verified on Hexagon and Zeiss CMMs (0.0015 mm accuracy).
Fast Prototypes
Engineering feedback with every quotation; prototype parts typically machined in 15 to 25 days.
One Supplier, End to End
Material sourcing, machining, heat treatment coordination, finishing, CMM inspection and export packaging under one roof.
Part-Specific Advantages
- Ø13 g6 and Ø16.5 g6 journals, minus 0.006/-0.017
- 8X Ø2.4 through on PCD Ø20.5 +/-0.1 plus 4X Ø1.9 holes
- 25 +/-0.02 square flange, parallelism 0.02
- Hard anodize film 0.1 mm, tolerances verified post treatment
- RoHS 2.0 compliant
Typical Applications
- Brake shaft seats for 20 series brake assemblies
- Square flange bearing seats in automation equipment
- Hard anodized rotating component mounts
Commercial Terms
| Commercial | Detail |
|---|---|
| MOQ | No MOQ; 1-piece prototype supported |
| Quote | Within 24 hours for complete 2D/3D files |
| Terms | EXW / FOB Shenzhen |
| Certifications | ISO 9001:2015 |
| Packaging | Individual bubble wrap, export carton or wooden case |
| Lead Time | Prototypes 7 to 15 days; production scheduled by volume |
Common Questions
Why hard anodize a shaft seat?
The journals clamp and release with the brake. Hard anodize takes the wear while the g6 class is kept by verifying tolerances after treatment.
Why 8 bolts on a Ø20.5 PCD?
Even clamp load around the flange with small hardware. Dense patterns like this are drilled with split bushings so each hole lands on its true position.
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