Gear and Spline manufacturing

CNC grinding shop

FRENCO produces gears and splines made to specification and in small batches. FRENCO is specialised in high-precision gearing. In cooperation with our partner company, we offer the production of complete parts to your specifications. Benefit from our extensive experience with gears and splines. After all, who doesn’t like to work with a partner who has made “pure perfection” his business and achieves it on a daily basis?

CNC grinding

NC form grinding of gear profiles:

Internal CNC grinding

NC grinding of gear profiles is carried out on a KAPP VUS 55 P and a VUS 57 P machine. These machines have been improved specifically to meet FRENCO’s requirements for high precision. Both dressable grinding wheels and CBN grinding wheels are used to grind internal and external tooth profiles.

Spline grinding

Specially developed software modules allow the machining of worms.Topological grinding of unusual modifications is also possible.High quality grinding of internal profiles requires workpiece-specific mounting fixtures and grinding arms, which makes a consultation with FRENCO’s specialists necessary.



Max. pitch lengthexternal gear
inside gear
750 mm
According to the arrangement
Max. length of profileexternal gear
inside gear
700 mm
According to the arrangement
Max. pitch circle diameter (PCD)external gear
inside gear
450 mm
According to the arrangement
Max. pitch weight50 kg
MaterialSteel titanium
Gear and spline accuracyexternal gear
inside gear
Q2 (DIN3962)
Q3 (DIN3962)

Manual grinding of gear profiles:

Even today it is often best to manufacture spur-toothed profiles using semi-automatic grinding processes.

That, however, demands high expectations from the grinding specialists. The interaction of machine, metrology and grinding specialist generates tooth profiles with µm-precision.

Max. pitch lengthexternal gear
internal gear
560 mm
300 mm
Max. length of profileexternal gear
internal gear
internal gear
internal gear
Pitch circle to 30
Pitch circle to 60
Pitch circle to 150
500 mm
70 mm
110 mm
150 mm
Max. conducting diameter300 mm
Max. pitch circle diameter (PCD)external gear
internal gear
300 mm
ca. 250 mm
Min. pitch circle diameter (PCD)internal gear16-18 mm
Max. pitch weight50 kg
MaterialSteel, copper, graphite
Gear and spline accuracyDIN 3962
DIN 5480
Q3
Q3

Wire-EDM

Wire-EDM

Wire EDM

The wire erosion machines are tuned to high precision through sophisticated technology. They are working in a fully climatised room. In combination with the in-depth knowledge of the operating staff, this results in a fantastic composition, which leads to the highest accuracy.

Wire eroding to manufacture internal gearing is possible within the following dimensions:

Max. workpiece sizeX=800 mm
Y=350 mm
Max. work areaX=320 mm
Y=220 mm
Max. work piece heigh or tooth widthZ=150 mm
Max. pitch circle diameter (PCD)Approx.. 210 mm
Wire diameter standard
Wire diameter special
0,25 mm
0,10 mm
MaterialSteel, cooper, non-ferrous metals
Max. pitch weight40 kg
Gear and spline accuracyQ3 DIN 3962
Q3 DIN 5480