Product Description:
TIMING PULLY 5mm Pitch
The drive pulleys 5mm The increased use of spline connections with involute tooth flanks has brought us to purchase a wide variety of hobbing and tools and this is in accordance with the various standardization systems.
These connections can be “sliding” or “fixed”, and with “centering” on the tooth flanks or on the external diameter of the axle (tooth tip) or on the inner diameter.
The involute spline connections are similar to the classic teeth for gears, with a pressure angle of 20° or 30° depending on the standard used. The intention which is the basis of this idea is: external spline connections manufactured in the same way (same machines and similar tools), as for the classic gears, by hobbing (hobbing and cutting tools). The corresponding internal spline connections manufactured by the gear generating proces at tooth hobbing machines (Fellows &-Lorenz) or by broaching machines (for larger series).
Certain systems are even equipped to use the same milling tools as for normal teeth.
The most common pressure angles are 20° (with adjusted positive addendum modification to obtain an effective pressure angle of ± 30 °in the area of the pitch circle; i.e. NBN 270 or PN-E 22-141) and 30° (DIN 5480, 5482 and AISI-B92-1-1970).
Recently the Americans added to the standard used pressure angle 30°, the standardization of the pressure angles 37°30′ and 45°. For choosing the tooth numbers, the module, the type of centering and fitting, we are referring to the tables published by the various standardization organizations.
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