BJ-Gear A/S offers a very wide range of worm gearboxes. Due to the modular design the standard programme comprises countless combinations when it comes to selection of gear housings, mounting and connection options, flanges, shaft designs, type of oil, surface treatments etc.
Sturdy and reliable
The design of the BJ worm gearbox is simple and well proven. We only use high quality components such as houses in cast iron, aluminum and stainless steel, worms in case hardened and polished steel and worm wheels in high-grade bronze of special alloys ensuring the optimum wearability. The seals of the worm gearbox are provided with a dust lip which effectively resists dust and water. In addition, the gearboxes are greased for life with synthetic oil.
Low noise
Our worm gearboxes and actuators are extremely quiet. This is due to the very smooth running of the worm gear combined with the use of cast iron and high precision on component manufacturing and assembly. In connection with our precision gearboxes, we take extra care of any sound that can be interpreted as a murmur from the gear. So the general noise level of our gearbox is reduced to an absolute minimum.
Angular gearboxes
The input shaft and output shaft on the worm gearbox are perpendicular to each other. This often proves to be a decisive advantage making the incorporation of the gearbox considerably simpler and more compact. The worm gearbox is an angle gear. This is often an advantage for incorporation into constructions.
Strong bearings in solid housing
The output shaft of the BJ worm gearbox is very firmly embedded in the gear house and is ideal for direct suspension for wheels, movable arms and other parts rather than having to build a separate suspension.
Atex approved
Our standard worm gearboxes are approved for Zone 2 and 22, but we offer to supply all our products in zone 1, 2, 21 and 22 according to the requirements.
Self locking
For larger gear ratios, BJ-Gear's worm gearboxes will provide a self-locking effect, which in many situations can be used as brake or as extra security. Also worm gear screw jacks with a trapezoidal spindle are self-locking, making them ideal for a wide range of solutions.
Interested in knowing more about self-locking effect?
Brochure: Worm gearboxes
Large reduction 100:1 in one step
The worm gearboxes allow for reductions of up to 100:1 in one single step or 10.000:1 in a double reduction. An equivalent gearing with the same gear ratios and the same transferred power is bigger than a worm gearing. Meanwhile, the worm gearbox is in a more simple design. A double reduction may be composed of 2 standard gearboxes or as a special gearbox.
To download as PDF, find the download link below the table.
|
Worm |
Ratios |
Maximum |
Housing |
|
Series 35 |
5:1 - 90:1 |
25 |
Aluminium |
|
Series 42 |
5:1 - 75:1 |
50 |
Cast iron |
|
Series 52 |
7:1 - 60:1 |
130 |
Cast iron |
|
Series 61 |
7:1 - 100:1 |
200 |
Cast iron |
|
Series 79 |
7:1 - 60:1 |
300 |
Cast iron |
|
Series 99 |
7:1 - 100:1 |
890 |
Cast iron |
Download the tabel in pdf format below.
Worm gearboxes with high precision
BJ-Gear A/S is also able to offer precision gearboxes and high precision gearboxes with a dual lead design.
The precision gearboxes
The precision gearboxes meets more strict precision requirements by virtue of special designs, production and assembly methods. The precision gearboxes are characterised by a low backlash and a very low generation of noise and vibrations. The gearboxes' backlash can be documented by measuring reports. On request we can deliver gearboxes with even lower backlash.
To download as PDF, find the download link below the table.
| Gear size | Backlash standard gearboxes | Backlash precision gearboxes |
| Series 42 | < 0.80° | < 0.20° |
| Series 52 | < 0.75° | < 0.20° |
| Series 61 | < 0.70° | < 0.20° |
| Series 79 | < 0.55° | < 0.15° |
| Series 99 | < 0.55° | < 0.15° |
Download the tabel in pdf format below.
The high precision gearboxes with dual lead design
All high precision gearboxes are produced for a specific purposes and according to customers' demands. They can be produced in aluminum, stainless steel or cast iron. The gearboxes are highly adaptable for various customised needs such as special flanges and output shafts. Even though the gearboxes are customised they can be delivered quickly due to a flexible and automatised production. The design can be customised and fitted with AC, DC or servo motors.
- Low noise
- Low backlash - backlash down to 1 arc minute
- No loss of efficiency
Stainless steel worm gearboxes
Are you looking for stainless steel worm gearboxes instead?
We have a wide range of gearboxes.
STANDARD worm gearboxes - stainless steel
BJ-Gear A/S offers a standard stainless steel gearbox range of high quality. The series is developed specifically for the food industry and other industries where there are continuously stringent requirements for the resistance of the material and the easy-to-clean design.
PREMIUM worm gearboxes - stainless steel
BJ-Gear A/S offers a premium stainless steel gearbox range of high quality. The series is developed specifically for the food industry and other industries where there are continuously stringent requirements for the resistance of the material and the easy-to-clean design.
NEW! - Stainless steel actuator
Stainless steel actuator with of protection of IP69K. The actuator is based on worm gears and is manufactured as standard in stainless steel AISI 304/EN 4301. The sealing is made of FDA-approved material and with the hygienic and easy-to-clean design and a sealing with a protection of IP69K, the stainless actuator is particularly suitable for the food industry.
Linear actuators
For linear motions, we offer our successful actuator programme consisting of two variants:
Linear actuators based on a worm gear drive.
Linear actuators based on a belt drive.