Central Pivot Bushes & Traction Rubber Blocks
Critical Elastic Joints for Traction Center Alignment and Longitudinal Force Transmission
Elastic Joints Between Carbody and Bogie
- Applications
- Locomotives, Wagons, Coaches, Metro
- Supply
- Replacement & Custom Parts
The bogie center pivot mechanism requires components that can transmit large longitudinal and transverse forces while permitting necessary rotational movement. Our central pivot bushes and traction rubber blocks are specially engineered to handle extreme shearing dynamic loads and shock forces encountered during acceleration, braking, and curve negotiation.
Utilizing specialized elastomeric compounds chemically bonded to steel sleeves, our bogie center pivot bushes provide optimal radial stiffness and progressive deflection. These low-maintenance components minimize dynamic play, prevent metal-to-metal wear, and significantly extend the operating lifespan of kingpins and pivot housings across heavy rail and urban transit networks.
Beyond the bushing itself, we supply traction rubber springs, traction center pads and elastic center pivot bearings for locomotives, freight wagons, passenger coaches and metro vehicles. Whether you need a direct replacement to match an existing part or a non-standard design built to your drawing or sample, GRS can source or make the part and support long-term replacement programs. Send us your drawing, sample dimensions or operating conditions, and our team will respond with availability, lead time and pricing.
Center Pivot & Traction Components
Three product families covering the pivot, traction and king pin interfaces between carbody and bogie.
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Heavy-Duty Central Pivot Bushes
Bogie center pivot bushes with elastomer chemically bonded to steel sleeves, designed for high horizontal shear loads and small rotational movement at the pivot.
- Steel-to-rubber vulcanized bond
- Controlled radial stiffness
- Less metal-to-metal wear
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Elastic Traction Rubber Blocks & Pads
Traction rubber springs and traction center pads in layered rubber-and-steel construction, transmitting longitudinal traction and braking forces between bogie and carbody.
- Multi-layer laminated structure
- Absorbs longitudinal shock
- Square and rectangular formats
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Custom King Pin Elastic Bearings
King pin bushes and elastic center pivot bearings, including flanged and non-standard shapes, sourced or made to your drawing, sample or existing part.
- Flanged and special geometries
- Made to drawing or sample
- Long-term replacement supply
How a Bonded Rubber Pivot Carries the Load
An elastic center pivot bearing combines rigid metal members with bonded elastomer layers. The metal parts locate the assembly, and the rubber carries load through shear and compression.
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High Shear Resistance
Bonded elastomer layers carry large horizontal and longitudinal shear forces while the pivot still allows small rotation during curving.
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Progressive Stiffness
Stiffness rises as deflection increases, which limits dynamic play under load and keeps the traction center aligned.
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Longitudinal Shock Absorption
Traction and braking impulses are damped by the rubber, reducing shock transferred into the kingpin, pivot housing and carbody.
Get the Selection Guide.
Tell Us What You Need.
Download the Chapter 6 selection PDF for central pivot bushes, traction rubber blocks and king pin elastic bearings. Then send your drawing, sample size or part number and we will reply with availability, lead time and pricing.
Chapter 6 - Selection Guide (PDF)
Central pivot bushes, traction blocks and king pin bearings.
Download PDF Catalogue- Replacement parts matched to your existing component
- Non-standard parts sourced or made to drawing or sample
- Most enquiries answered within 24 business hours
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