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JBJ Techniques industrial clutches and gearboxes

12 May 2016

JBJ Techniques' offers a range of industrial clutches and gearboxes for close couple to diesel engines with SAE style flywheel facility.

- 'BD' series clutches for close couple to diesel engines with SAE style flywheel facility.

- 'BDS' clutches for independent, in-line arrangements, capable of accepting high radial loads and transmitting powers of up to 850kW as standard. Versions are also available to close couple hydraulic pumps to the clutch output shaft.

- 'RM' version gearboxes are specifically designed for close coupling to industrial diesel engines and are available in either speed increasing or speed reducing format.

Gearboxes can be supplied with output shaft either same or opposite rotation to input shaft. Input to the gearbox can be made either by rigid/flexible coupling or via a 'BD' series clutch. 

Type BD clutches have been designed to mount onto any engine with flywheel and bellhousing conforming to SAE dimensions. These clutches consist of an over-centre clutch assembly mounted onto a tapered shaft carried on two bearings. The pilot bearing is housed in the engine flywheel and the outer bearing serves to support the output shaft and is capable of withstanding radial loads as detailed within this catalogue. For exceptionally high radial loads models BD290/150R, BD2200R and BD3300R are available with special heavy duty bearings. Power is transmitted by clutch plates located within a driving ring bolted to the engine flywheel. The clutch mechanism is equipped with a novel automatic clutch adjustment device capable of compensating for reasonable clutch plate wear. Type BDS units provide a range of free-standing clutches intended for applications where engine mounting is not possible. BDS clutches consist of a BD type clutch but with a drive plate supported on the input shaft carried on two bearings in the independent bellhousing. The drive plate carries the driving ring and main shaft pilot bearing. BDP and BDSP clutch units are constructed as per the standard type BD and BDS clutches, but offer a selection of hydraulic pump adaptors in place of output shaft.

Outrigger bearing housings for applications demanding high radial loads, such as ‘’V’’ belt drives etc., jbj Techniques offer a range of outrigger bearing housings. These outriggers transfer the radial load from the engine rear main bearing to the shaft support bearing located in the housing. Most outrigger housings consist of type BD over-centre bellhousing and input shaft, with coupling in place of clutch, and therefore closely resemble BD units, but without operating lever. 

BD and BDS clutches are available with hydraulic pump adaptor in place of output shaft on models BDP and BDSP. The pump adaptors take the same form as offered on the type AM multiple pump drive units, but the selection of adaptors may be restricted according to the clutch and pump combination planned.

RM gearboxes consist of a 2-piece cast iron casing with helical teeth, case hardened gears and shafts. Reverse rotation units have a primary gear on the input shaft driving directly onto the secondary gear powering the output shaft. Same rotation versions have an idler gear between primary and secondary gears. There are 3 basic types of RM gearbox; RM-GR models are for close coupling to diesel prime movers and have a choice of SAE housing and rigid or flexible couplings; RM-BD models are similar to RM-GR but are fitted within an over-centre clutch in place of coupling, RM-BDS models offer independent mount units with over-centre clutch.

Oil Bath Clutches- these units are free standing clutches of the multiple plate, oil bath type. These clutches are particularly suited to arduous applications and are capable of withstanding high radial loads. The PFI60 and PFI120 are manufactured with input and output shafts. The PFI60P and PFI120P are intended for hydraulic pump direct connection with the same pump adaptor flanges and couplings as on AM 230 - 450 pump drives which means the possibility to fit a large number of pumps with standard components.

Further information and specification catalogue can be found at

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