Specifications:
The document outlines specifications for adjustable and stationary bushings used in guide roller systems. The adjustable bushing (BX) features an eccentric mounting hole, allowing clearance adjustments between the wheel and track by rotating the bushing on its fastener. The stationary bushing (B) has a concentric mounting hole and is designed to carry the major load.

Material:
Both bushings are made from carbon steel with electroless nickel plating.

Dimensions:
The document provides detailed dimensions for various models (VW-1 to VW-4, BX-1 to BX-4, and B-1 to B-4), including inner diameter (ID), outer diameter (OD), hex size, and eccentricity (ECC).

Design Improvements:
The adjustable bushing now includes a knurled face to maintain its position more effectively.

Recommendations:
The document suggests recommended fastener sizes for each bushing model to ensure optimal performance.