Contoured Five-Spoke Wheel Hub with Notched Rim Barrel
A five-spoke hub with sculpted spoke pockets, a turned rim barrel, a central bore and a five-hole bolt circle. The spoke faces are ball-nose contoured, so the surface is set by the stepover rather than by a single finishing pass.
Material
Carbon Steel S45C
Tolerance
Bore to bolt circle concentricity ≤ 0.03 mm
Process
CNC Milling, CNC Turning
What This Part Does And What Matters On It
The function of the part, the features that carry the fit, and the requirements that decided how it was machined and checked.
A five-spoke hub with sculpted spoke pockets, a turned rim barrel with notches, a central bore and a five-hole bolt circle. The rim and bore are turned; the spoke pockets are ball-nose contoured on the machining centre, so the surface on the spoke faces is set by the stepover rather than by a single finishing pass.
The dimensions that matter are the bore to the bolt circle and the rim to the bore, both of which depend on holding the part on the same axis across operations. The contoured faces are a finish decision: a finer stepover gives a smoother surface at a longer cycle time, and the drawing should say which it wants.
Send the mating hub or its drawing so the bore and bolt circle can be measured against what they fit.
The Numbers That Control This Part
Process, material, finish, and the tolerances that were held. Send your own drawing and Owen quotes against the same list.
- Machining Process
- CNC Milling, CNC Turning
- Part Type
- Hub
- Material
- Carbon Steel
- Material Grade
- S45C
- Surface Finish
- As Machined
- Critical Tolerance
- Bore to bolt circle concentricity ≤ 0.03 mm
- Industry
- Automotive
- Application
- Wheel hub for test and handling equipment
- Bore
- H7
- Bolt circle position
- ±0.03 mm
- Rim diameter
- ±0.05 mm
- Contoured surface
- Ra 1.6
Have A Part Like This On Your Drawing?
Send the drawing with the material, quantity, and the tolerances your inspection actually checks. Owen reviews it against how this part was run and comes back within 24 hours on business days with a price, a lead time, and DFM notes before you commit to anything.
How This Part Was Machined
Rim barrel, bore and faces turned first; the hub is then located on the bore for milling of the spoke pockets and drilling of the bolt circle, so bore and bolt circle share one axis. Spoke faces finished by ball-nose contouring with a fine stepover.
How This Part Was Checked
Bore and bolt circle measured from the bore datum; rim diameter and notch positions checked; contoured faces checked for cusp height.
Bore and rim diameters
Bolt circle position from the bore and rim notch positions
Every Quote Comes With DFM Notes
Owen reads the drawing before pricing it: tolerances that add cost, features that need a second setup, finishes that change lead time. Send a STEP or PDF with the material and quantity, and the quote reflects what is actually machinable, within 24 hours on business days.
More Photographs Of The Finished Part
Surfaces, edges, and features after machining and finishing. Click any image to open it at full size.
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Material Certificates And Inspection Reports Travel With The Parts
Tell Owen which records your receiving inspection needs: mill certificates, first article report, CMM report, certificate of conformance, or all of them. They are agreed at quoting, not requested after the parts arrive.
Have A Similar Part? Send The Drawing.
A STEP, IGES, or PDF file with the material, quantity, and the tolerances that matter is enough to start. You get a price, a lead time, and manufacturability feedback from a real person, not a bot.
Owen Lan
Sales, Zhongjiecheng Auto
Replies within 24 hoursEvery message from this page reaches me directly. If your part looks anything like the one above, tell me the material, the quantity, and the dimensions you care about most, and I will tell you how we would run it and what it costs.
Prototypes and production runs both welcome. Tolerances, finishes, inspection records, and packing are confirmed before you pay a deposit.
Owen Lan
Sales, Zhongjiecheng Auto CNC Machining
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