1, 2 or 3 stages · up to 500Nm · ratios 1.33 to 353.98:1 · solid shaft 11 to 40mm · IEC 63 to 112
The HA Series is the die-cast aluminium version of Motovario’s inline helical range: lightweight, compact and cost-effective for lower power applications. Two and three-stage units run from 100Nm to 500Nm, with single-stage units for low ratios. For higher torque, the cast iron H/HR Series runs to 8,000Nm.
The two and three-stage HA Series comes in four sizes, HA32/33, HA42/43, HA52/53 and HA62/63, with nominal output torque from 100Nm to 500Nm and solid output shafts from 20mm to 40mm. Single-stage units, HA31, HA41, HA51 and HA61, cover ratios from 1.33:1, and the full range reaches 353.98:1. Across all sizes, solid output shafts run from 11mm to 40mm.
Casings are die-cast aluminium alloy, shot-peened, washed and passivated, then finished in blue RAL 5010 epoxy-polyester powder. Motovario quotes an average efficiency of 0.97 for one stage, 0.96 for two and 0.94 for three.
Units are available as compact geared motors (CHA), which keep the overall length down, with an IEC motor adaptor in B5 or B14 for motors from IEC 63 to 112 (HA), or with a solid input shaft (IHA). Casings are available with feet, with a flange (F) or as a universal (U) version, and ATEX versions are available.
| Specification | HA Series |
|---|---|
| Type | Inline helical gear reducer / geared motor |
| Sizes | Single stage: HA31, HA41, HA51, HA61. Two and three-stage: HA32/33, HA42/43, HA52/53, HA62/63 |
| Nominal output torque | Up to 500Nm (two and three-stage 100 to 500Nm; single-stage up to 110Nm) |
| Ratios | 1.33:1 to 353.98:1 |
| Average efficiency | 0.97 (1 stage); 0.96 (2 stages); 0.94 (3 stages) |
| Solid output shaft | 11 to 40mm across all sizes (20 to 40mm standard on two and three-stage sizes) |
| Motor power | Up to 5.5kW [confirm] |
| Maximum radial load | 8,000N |
| Input versions | CHA compact geared motor; HA with IEC motor adaptor (B5 or B14); IHA solid input shaft |
| Motor sizes | IEC 63 to 112 |
| Mounting | Foot, flange (F) or universal (U) |
| ATEX | ATEX versions available |
| Casing | Die-cast aluminium alloy, shot-peened, washed and passivated |
| Finish | Blue RAL 5010 epoxy-polyester powder |
| Lubrication | Supplied filled with mineral oil (ISO VG220); no oil plugs, lubricated for life and maintenance-free |
| Design standards | DIN 3990, ISO 6336, AGMA 2101, DIN 3991, ISO 281, DIN 743 |
| Size | Nominal torque (Nm) | Ratio range | Solid shaft (mm) |
|---|---|---|---|
| HA32/33 | 90/100 | 5.38 to 347.29 | 20 (19 option) |
| HA42/43 | 155/150 | 5.38 to 347.29 | 25 (28 option) |
| HA52/53 | 300 | 5.14 to 353.98 | 30 (35 option) |
| HA62/63 | 500/480 | 5.14 to 353.98 | 40 (35 option) |
Source: Motovario H Series Standard IEC Technical Catalogue (helical geared motors, H, HR and HA), as held in the Betech download library, with nominal torque Mn2 and ratio ranges from the IH/IHA reducer tables at 1400rpm input and the geared motor tables; cross-checked against the Motovario helical product pages (cast iron and aluminium) and Motovario brochure DP-H EN/2019/REV.0. Checked 1 November 2026.
For technical information, brochures and further product details, visit our downloads page.
For lower power drives up to 500Nm, where a lighter, lower cost aluminium unit is enough. For higher torque or heavier duty, the cast iron H/HR Series runs from 55Nm to 8,000Nm.
The first digit after HA is the casing size and the second the number of stages. An HA52 is a size 5 unit with two stages; an HA53 has three; an HA51 is single-stage.
The CHA version mounts the motor directly to the gearbox without a separate IEC adaptor, which shortens the overall length of the geared motor.
IEC motors from frame 63 to frame 112 with B5 or B14 adaptors. Motovario three phase motors and brake motors cover this frame range.
Browse the HA Series by size, ratio and shaft, or tell us the torque, output speed and motor and we will specify the unit.
Contact
Betech 100pt Ltd
Four Square Buildings, Thomas Street
Heckmondwike, West Yorkshire, WF16 0LS
Telephone: 01924 411921
Email: sales@betech.co.uk
Opening hours: 8:00 to 17:00
