Helical Gearboxes

Frequently Asked Questions

When should I choose a helical gearbox over a worm gearbox?

As a rule of thumb, helical gearboxes are preferred where efficiency and continuous duty matter: per-stage efficiency is generally near 96-98 percent, so even multi-stage units stay well above 90 percent, against roughly 60-90 percent for worm drives. Choose helical for high power, low running cost and long thermal duty. Worm units can still win where you need a compact right-angle drive, very high single-stage ratio, or inherent self-locking. Where a right angle is needed without the worm penalty, a bevel-helical unit is usually the better answer.

What's the MOQ for helical gearboxes?

It depends on frame size and ratio. For large industrial helical units (high torque, engineered ratios) MOQ can start as low as 1-5 pieces per size. For smaller standard frames and helical gearmotors produced to catalogue, typical MOQ starts around 20-50 pieces depending on manufacturer and configuration. Mixed-size orders consolidated under one spec package generally accept smaller quantities per line.

Which certifications and compliance options are available?

Where specified, partner manufacturers supply units with CE marking under the Machinery Directive, ATEX/IECEx for hazardous-area duty, and ISO 9001 quality systems. Gear-rating documentation to AGMA 2101 / ISO 6336, load and efficiency test reports, and material traceability can be provided. IP55/IP65 ingress and specific surface treatments are available where the application demands them.

What ratios, mountings and output options can be configured?

Single-stage reductions typically run about 1.25:1 to 8:1, with two- and three-stage trains reaching roughly 200:1 and beyond. Inputs include IEC/NEMA motor adapters, servo flanges or free input shafts; outputs are solid or hollow shaft, shrink disc or flange. Foot, B5/B14 flange and shaft-mounted positions are standard. Lubrication is ISO VG 220/320 mineral or synthetic PAO, with service factor selected per AGMA SF against your duty.

Do your partners supply to OEMs and to end-client specifications?

A subset of Himalay's partner network supplies to OEMs in material handling, cement, sugar and EV drivetrains, building to their drawings and approved-vendor requirements. Share your spec or drawing at inquiry stage and we match a qualified partner; supplier audits can be arranged on a development track where an end client requires them.

How long does a helical gearbox order take?

Catalogue gearmotors and standard frames: typically 6-10 weeks manufacture, test and packaging. Larger engineered helical units: 12-16 weeks. Full CIF to Rotterdam, Antwerp, Jebel Ali or Dammam is typically 8-12 weeks door-to-door for standard product, and 14-20 weeks for engineered or large units.