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Sprockets

Sprockets

  • Wear-resistant sprockets (OEM quality)
    Advanced metallurgical processes ensure excellent quality
  • Undercarriages for machines from 0.8t to 200t
    Sprockets with pitches ranging from 72mm to 317.5mm
  • Sprockets and segment groups for earthmoving machinery
    For various brands: Kubota, Caterpillar, Komatsu...
  • Proven high customer satisfaction and first-class advice
    4,7 Star reviews on Google
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Sprockets

To drive your machine’s undercarriage, check out our quality sprockets. Manufactured with high-quality materials, our sprockets are designed to withstand the toughest conditions. Our supply range covers machines with tonnages from 0.8 ton to 300 ton. For applications such as bulldozers and tracked dumpers, we also supply the segment groups.

Sprockets, weld-on rims and sprocket segments are designed to be fitted on most travel motors (final drives) of bulldozers, excavators, dumpers,… Typical hardnesses after induction hardening are :

  • Surface : HRC55
  • Case depth: HRC45 from 3 to 7mm, according to size
  • Core: HB210

sprocket om op te schroeven
sprocket van een skid-steer of schranklader

Bolt-on sprockets 

Sprockets are usually produced with teeth and a mounting hub in one piece. In most excavator undercarriages, the sprockets are attached to the machine by bolts that are placed one at a time in the bolt holes of the hub. In some sprockets, the hub is in the same plane as the teeth. On other sprockets, the hub may be completely “off center.” In other words, the hub is not in the same plane as the teeth.
Depending on the size of the excavator, the sprocket bolts will be larger in diameter and therefore also the tightening torques to which the bolts should be tightened.

Weld-on sprocket rims

In some circumstances, certain bolt-on sprockets are not available (anymore). This may occur in the following situations:

  • The sprocket in particular came from an old machine whose parts production is no longer supported.
  • The sprocket comes from a machine of which only a very limited number have been released: a minimum quantity is needed to produce new bolt-on sprockets.

As soon as sprockets are difficult to obtain, in such cases one can still renew a worn sprocket, thanks to the use of a weld-on rim. In this process, the sprocket-hub of the old sprocket is detached from the worn toothing. Then the old hub is welded to a new toothing (the weld-on rim).

aanlaskrans van het rijwerk. De aanlaskans heeft geen montage-ring
la soudure d'une couronne a souder
een korte segment en een lange segment voor de sprocket van een bulldozer rijwerk

Sprocket segments and segment groups 

On most bulldozers and dumpers, the sprocket wheel is not a single unit but is composed of several shorter pieces or segments. One segment usually has 3 to 6 teeth. A segment group is composed of a few segments, sufficient to provide 1 side of the machine with a complete sprocket. For example: On the final drive of a Caterpillar D6N LGP, one can find sprockets with 25 teeth. Each segment has 5 teeth. A segment group is then supplied consisting of 5 segments.

How do I know if my sprockets are worn out ?

On a new sprocket, the tops of the teeth have a certain thickness. The top of the teeth may be 10 to 20 mm thick. On mini excavators, this can be a little less. On a worn sprocket, the teeth have become much thinner sometimes up to 1 mm.

How do I renew my sprockets ?

Watch our instructional video here or follow these steps:
1.)Make the heads of the sprocket bolts accessible so that a socket wrench can fit nicely.
2.)Loosen the bolts one by one with an impact wrench.
3.)Then knock the sprocket off the reducer case (reduction box) with a hammer. Usually it comes off smoothly.
4.)Clean the reducers mounting flange/hub; remove all rust and sand.
5.)Clean the inner hub (mounting-ring) of the sprocket ; remove all layers of paint and/or grease.
6.)Feel with your finger along the hub (mounting flange) both on the reducer and the sprocket. If you feel bumps/burrs, remove them by sanding the surfaces.
7.)Clean all threads in the reducers hub/flange with a machine tap. Also inspect the threads of the bolts. In case of doubt replace the bolts. 
8.)Now install the sprocket, making sure it fits closely to the reducers flange. Insert all bolts and tighten them by hand. 
9.)Tighten the bolts crosswise with an impact wrench. 
10.)Check the required tightening torque with a torque wrench.