Description

Overview

The flanged inner camshaft bush 1 5/8 inch supports the brake camshaft inside the spider so the S-cam runs true under load. This flanged inner bush locates the camshaft axially and radially, which helps maintain correct brake shoe travel and reduces vibration in heavy trailer foundation brakes. Because it suits a 1 5/8 inch camshaft and uses a flanged body, it provides positive location against the brake spider face during operation. As a result, it is a practical replacement choice when you refresh worn S-cam hardware.

Features

This flanged inner bush includes a flange shoulder that stops the bush walking through the spider during service. The 1 5/8 inch camshaft size suits many heavy trailer and axle brake platforms, so it fits common S-cam layouts. Additionally, the 43mm length supports the camshaft journal over a sensible bearing surface, which spreads load and helps resist ovality in the spider bore. In service, the flanged inner camshaft bush 1 5/8 inch therefore assists with consistent brake response and more predictable lining wear.

• Flanged shoulder to positively locate the bush in the spider
• Inner diameter sized for 1 5/8 inch brake camshafts
• Outer diameter sized to suit the matching spider bore
• Short, rigid body to handle heavy foundation brake loads

Specifications and Materials

Part number: FB2222.
This flanged inner bush has a 41mm inner diameter, a 51mm outer diameter and a 43mm body length, so it matches the listed 1 5/8 inch camshaft specification and a typical spider housing bore. Steel construction provides a hard bearing surface that works with a greased camshaft journal for long service life, provided you keep up with lubrication. For general background on how flanged bushings support rotating shafts in plain bearing applications, refer to this plain bearing overview.

Compatibility and Fitment

This bush suits brake camshafts with a 1 5/8 inch journal diameter and a spider bore sized for the stated outer diameter and length. You should always confirm the spider bore, camshaft size and length against your existing hardware before installation, because worn parts or previous repairs may not match catalogued dimensions. This cross-reference listing means this part is a suitable replacement for the part numbers and applications shown. Some changes in installation may be required. Currently there are no specific cross-reference part numbers published for this flanged inner bush, so selection should rely on camshaft diameter and housing measurements on the trailer.

Compliance and Safety

Heavy vehicle brake components work under high load, so you should only install this flanged inner camshaft bush 1 5/8 inch as part of a proper brake inspection. Always secure the trailer, chock wheels and release all stored energy before pulling S-cam assemblies apart. In addition, use appropriate workshop tools so you press the bush squarely into the spider and avoid damage to the bore. After fitment, you must check camshaft end float, shoe travel and brake adjustment to confirm the foundation brake still operates within the relevant roadworthy standard.

Trailer Applications

Workshops typically install this flanged inner bush on heavy trailers, dollies and semi-trailers that use S-cam foundation brakes with a 1 5/8 inch camshaft. It suits brake spiders that accept a flanged inner bush rather than a straight sleeve, so it is most common on axles that rely on the flange to control axial movement. Moreover, it is a sensible choice during full brake overhauls where you already have the hub and drum removed and want to reset camshaft support back to original condition. By replacing worn bushes, you help the flanged inner camshaft bush 1 5/8 inch restore correct camshaft alignment and contribute to even braking across the axle set.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Why Choose ICS Trailers

ICS Trailers focuses on heavy trailer brake and running gear parts, so you can match this flanged inner bush to a wide range of axle and brake assemblies with confidence. Our team selects practical, workshop-proven components that support reliable foundation brake performance over long service intervals. In addition, we back our range with local knowledge, clear technical data and responsive support to help you keep trailers on the road and minimise downtime. Browse Foundation Brakes at ICS Trailers in our Foundation Brakes category