---
title: "Elleuno Distributor of Leroy Somer  - Geared Servo Motors Leroy Somer Mjd Dynabloc"
description: "Servo gearmotor Leroy Somer Mjd Dynabloc. Mjd Dynabloc Leroy somer is a range of high precision servo gearmotors for applications requiring low backlash"
url: "https://motorielettrici.elleuno.eu/en/geared-servo-motors-2/geared-servo-motors-mjd-dynabloc.html"
date: "2026-09-22T14:59:20+00:00"
language: "en-GB"
---

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- [Catalogues](https://motorielettrici.elleuno.eu/en/catalogues.html)
- [The Leroy Somer distributor](https://motorielettrici.elleuno.eu/en/the-distributor.html)
- [Contact](https://motorielettrici.elleuno.eu/en/contact.html)

**All Leroy Somer electric motors. Sales, assistance, spare parts. Phone.+39 028131848 - email <info@elleuno.eu>**

LEROY SOMER ELECTRIC MOTORS

 ##  Geared Servo Motors Leroy Somer Mjd Dynabloc

   Details   Category: [Dynabloc Geared Servo Motors Leroy Somer](https://motorielettrici.elleuno.eu/en/geared-servo-motors-2.html)

#### ![ServoMjd551FM115 200](https://motorielettrici.elleuno.eu/images/servo_motoriduttori/ServoMjd551FM115-200.jpg)Backlash from 1 to 10 arcmin (Low backlash BASIC/MEDIUM/EXPERT)

Ratios from 5 to 90 (one stage)

Mjd Dynabloc is a range of high-precision geared servo motors for applications requiring reduced backlash.

The high-efficiency worm gearbox provides very low backlash and very high torsional stiffness. This guarantees motor stability even at dynamic operation with high inertia loads. The gearbox’s right angle design and multiple mounting positions help to save space for easy integration into machines. The worm design offers the added advantage of quiet operation.

The Mjd Dynabloc range can be fitted with Unimotor hd or fm servo motors depending on the required application:

Unimotor hd - designed for pulse duty applications requiring high dynamics
Unimotor fm - ideal for continuous duty applications with high inertia loads

**Advantages**

- Very low backlash
- Very High torsional stiffness
- High efficiency worm gearbox
- High inertia option available with fm motor
- Space-saving right angle design
- Multiple shafts and mounting positions for easy integration into machines
- Quiet operation
- Maintenance free
- Lubricated for life​

**Main characteristics**

- Rated torque N.m 23 to 668
- Max acceleration torque N.m Up to 1100
- Gearbox ratio 5 to 90
- Backlash arcmin
    - BASIC: 10
    - MEDIUM: 5
    - EXPERT: 1
- Motor Unimotor hd or Unimotor fm
- Motor speed rpm 3000
- Efficiency % Depending on ratio
- Output shaft
    - Plain shaft with key
    - Keyed hollow shaft or
    - unkeyed with shrink disk
- Mounting Foot or flange with tapped holes (B14)

 | Download |
|---|
| [catalog![download pdf](https://motorielettrici.elleuno.eu/images/icone/pdf35.png)](https://motorielettrici.elleuno.eu/images/servo_motoriduttori/en/catalogo-servo-motoriduttori-5409h_en.pdf) |
| [manuals![download pdf](https://motorielettrici.elleuno.eu/images/icone/pdf35.png)](https://motorielettrici.elleuno.eu/images/servo_motoriduttori/en/mid-3831a_en.pdf) |

 [ Elleuno  Leroy Somer ](https://motorielettrici.elleuno.eu/ "Elleuno")

ELLEUNO srl Via Bari 24 20143 MILANO Italy - P.IVA: 06810830965 - Tel +39 028131848 - Fax: +39 02.89190444 [info@elleuno.eu ](mailto:info@elleuno.eu)

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- [ ![Italiano (it-IT)](https://motorielettrici.elleuno.eu/media/mod_languages/images/it_it.gif "Italiano (it-IT)") ](https://motorielettrici.elleuno.eu/it/servo-motoriduttori-leroy-somer/servo-motoriduttore-leroy-somer-mjd-dynabloc.html)
- [ ![English (United Kingdom)](https://motorielettrici.elleuno.eu/media/mod_languages/images/en_gb.gif "English (United Kingdom)") ](https://motorielettrici.elleuno.eu/en/geared-servo-motors-2/geared-servo-motors-mjd-dynabloc.html?markdown=1)

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