Material: Steel 11SMnPb37 (1.0715), inspected for fissures, case
hardened HV 620-700, ground. Pressure angle 15°. Attention:
Keyway not according to DIN. The worms can only be used with gear wheels
having the same centre distance and the same transmission. Can be built
into gear systems, no reworking required, thus short assembly times. The
figures stated for the efficiency are only reference values, since –
besides the lead angle – also mounting, lubrication, speed and assembly
have an influence on the efficiency.