Ernst Grob, Switzerland
Association since 2009
Cold forming specialists – powered by Swiss Engineering
Spline Forming machines for external/internal splines
Unique spline forming process developed by Grob enables fast & accurate spline forming with no limitation on spline length
Applications
Flange Drive Shaft
- Involute spline // module 1.1 mm
- No. of teeth 27
- Spline lenght 28 12 mm
- C 6 // 2 rollers/head // continuous mode
- Production time approx. 8 s
Gearbox Main Shaft
- Involute spline // module 3.4 mm
- No. of teeth 30
- Spline lenght 37 + 12 mm
- C9 // 1 roller/head // continuous mode
- Production time approx. 26 s
Yoke Shaft
- Involute spline // module 2 mm
- No. of teeth 18
- Spline lenght 142 +12 mm
- C6 // 1 roller/head // continuous mode
- Production time approx. 40 s
Sheet metal splines external/internal including slotting.
Enables complete processing of parts like Clutch Plate Carrier including trimming to length, spline forming, slotting of oil holes, snap ring grooves & forming of end stops.
Applications
Clutch Plate Carrier
- Trimming to length
- Slotting of oil holes (booths)
- Forming of snap ring grooves
- Forming of end stops
- Production time on S8/4 (4 stations)
- Production time approx.16 s
Cold reduction of solid or hollow shafts
Ideal for parts like Torsion bar . Yoke tube, Steering tube, Torsion springs etc.
Applications
Torsion Bar (Spring)
- Reduction from Ø 27 mm to Ø 19 mm
- Elongation from 530 mm to 830 mm
- 12 NC // 1 roller/head // continuous mode
- Production time approx. 60 s.
Yoke Tube
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Truck Spring
- Reduction of spring end section
- Ensures equal spring rate when loaded and unloaded
- Maintains uniform performance under varying loads
Steering Tube
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Forming Processes
Cold Rolling
Cold Reduction of Solid
Spline forming of a Tube
Without Spinning
Cold Reduction
