RB - Bonomi


Fields of application of our pins: excavators, mini excavators, track and wheel loaders, bulldozers, backhoe loaders, dumpers, dozers, graders and other earth moving machines.

In the field of earth-moving machinery design and construction, pins like bushings, with which they work in synergy, are key elements. These allow for connection joints on machine arms to function.

R.B. offers immediate availability of more than 2,000 types of pin in treated (standard) steel, and with electrogalvanisation and phosphating treatments, of a diameter of between 16 and 130 mm.

Thanks to our wide range of excavators pins we can cover over 1.000 models of machine providing different kind of pins like: Bucket Pins, Stay Arm Pin, Bucket Cylinder Rod End with Tipping Link Pin, Bucket Cylinder Case End Pin, Arm Cylinder Rod End Pin, Boom to Arm Pin, Arm Cylinder Case End Pin, Boom Cylinder Rod End Pin, Boom Foot Pin and Boom Cylinder Case End Pin.

These products are 100% made in Italy and guarantee excellent performance and durability. R.B. can satisfy requests for large quantities as well as smaller, more specific orders. We guarantee the manufacture of items not in stock within a maximum of 24/48 hours per item according to client drawings and/or samples.


Pins Made from 42CrMo4 steel, our pins guarantee the utmost performance and durability.

We have a stock of more than 2,000 different types of pin with diameters from 16 to 130 mm in a range of forms: with extraction holes and greasers, dowel holes and split pins, flanges and borders.


Electrogalvanisation is a process in which a zinc coating is applied to the pins, providing them with an extra level of protection. This treatment is particularly suited in all extreme climatic conditions.

We have electrogalvanised pins in stock and can also produce them on request in accordance with a range of technical specifications.


Phosphating is a chemical process that allows the surface of a metal to be altered through the creation of phosphatic crystals, thus creating a composition that provides better resistance to corrosion and wear.

Pins subjected to this treatment have a black surface.

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