Holroyd has manufacturing capability to produce wormgears ranging from 28.5mm (1 1/8" centre distance) to 1040mm (41" centre distance) with the upper engineering limits generally as listed below.

Wormwheels

1:1 Ratio	Maximum outside diameter 228mm (9")
2:1 Ratio	Maximum outside diameter 457mm (18")
3:1 Ratio	Maximum outside diameter 685 mm(27")
4:1 Ratio	Maximum outside diameter 914mm (36")
5:1 and up	Maximum outside diameter 2133mm (84")

Wormshafts

Maximum outside diameter	457mm (18")
Maximum length (dependant on shaft diameters)	3050mm (120")
Maximum lead	914mm (36")
Maximum lead angle	45 degrees

Gas carburisation and case hardening can be carried out on wormshafts up to these dimensions.

Should you require any further information, please contact our Technical Sales Department.

Ask for our 'Design Guide', a publication designed to simplify the worm gear design and specification process.