Sicor MR21 SSB Geared Elevator Traction Machine
Sicor MR21 SSB is an Italian geared traction machine with safety slow shaft brake option designed for reliable elevator traction, smooth ride performance and long service life in demanding lift applications.
Description
What is a geared traction machine?
The Sicor MR21 SSB is a geared elevator traction machine. A geared machine drives the sheave through a worm or helical gearbox, which multiplies torque and allows a smaller, lower-cost motor to move the same load.
Geared machines are typically specified for machine room (MR) elevator systems at low to medium speeds, and for freight and goods lifts where high starting torque matters more than energy efficiency. Nazar Elevator supplies the Sicor MR21 SSB to elevator contractors and distributors worldwide.
Technical Specifications
Technical Specifications
| Machine type | Geared traction machine (worm gear) |
|---|---|
| Product series | SV / SH / MR |
| For rated loads up to | 2000 kg |
| Speed range (50 Hz) | 0,44 ... 3,76 m/s |
| Speed range (60 Hz) | 0,53 ... 4,51 m/s |
| Max. static load | 55 kN - 5600 kg (MR21) · 72,6 kN - 7400 kg (MR21TS) |
| Gear ratios | 1/62; 1/51; 1/40; 2/63; 2/51; 3/47 |
| Traction sheave diameters | 520, 600, 650, 690, 750 mm |
| Weight | 770 ÷ 1000 kg |
| Oil capacity | 7,8 l |
| Mounting | Right-hand or left-hand (from motor side) |
| Manufacturer | Sicor Italy S.R.L., Rovereto, Italy |
Power range by supply and poles
| Supply / poles | Motor power |
|---|---|
| 50 Hz 4 poles ACVVVF | 9 ÷ 30 kW |
| 50 Hz 4/16 poles | 9 ÷ 16,5 kW |
| 50 Hz 6 poles ACVVVF | 7,5 ÷ 20 kW |
| 50 Hz 6/16 poles | 7,5 ÷ 13,5 kW |
| 60 Hz 4 poles ACVVVF | 10 ÷ 33 kW |
| 60 Hz 4/16 poles | 10 ÷ 18 kW |
| 60 Hz 6 poles ACVVVF | 8,2 ÷ 22 kW |
| 60 Hz 6/16 poles | 8,2 ÷ 15 kW |
Traction sheaves and grooves
| Sheave Ø [mm] | Rim width E [mm] | Max. grooves × rope Ø | Groove pitch [mm] |
|---|---|---|---|
| 520 | 176 | 7xD10, 6xD13, 10xD10, 9xD11, 9xD12, 8xD13 | 24 / 30 / 16 / 18 / 19 |
| 600 | 160 | 9xD10, 8xD11, 8xD12, 8xD13, 6xD14, 6xD15 | 16 / 18 / 19 / 22 |
| 650 | 160 | 9xD10, 8xD11, 8xD12, 8xD13, 6xD14, 6xD15, 6xD16 | 16 / 18 / 19 / 22 |
| 690 | 160 | 9xD10, 8xD11, 8xD12, 8xD13, 6xD14, 6xD15, 6xD16 | 16 / 18 / 19 / 22 |
| 750 | 160 | 9xD10, 8xD11, 8xD12, 8xD13, 6xD14, 6xD15, 6xD16 | 16 / 18 / 19 / 22 |
Notes
- This version is supplied with the SSB safety brake on the slow shaft, available from Sicor on request. All other data is common with the base model.
- Per-configuration motor values (rated current, torque and power factor) are given in the Sicor electric motor data tables and are available on request.
Data source: Sicor SV/SH/MR and SGS/SG machine brochures (BRH0057 rev. 12, BRH0004 rev. 19, BRH0076 rev. 02).
Frequently Asked Questions
The Sicor MR21 SSB Geared Elevator Traction Machine is rated for project-specific. Always verify the final capacity against the official data sheet and elevator calculation before ordering.
The Sicor MR21 SSB Geared Elevator Traction Machine is designed for project-specific. The exact speed configuration depends on roping ratio, sheave diameter and inverter settings.
The Sicor MR21 SSB Geared Elevator Traction Machine is a Geared Traction Machine with Safety Slow Shaft Brake Option. This design reduces mechanical losses and simplifies maintenance compared to conventional solutions.
Sicor MR21 SSB is an Italian geared traction machine with safety slow shaft brake option designed for reliable elevator traction, smooth ride performance and long service life in demanding lift applications.
Yes. Nazar Elevator can supply the Sicor MR21 SSB Geared Elevator Traction Machine as part of a complete lift package including cabin, doors, control panel and safety components. Contact our export team for project-specific configurations.
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