Block Chains


1 Inch Pitch Chain

RM Fowler stock a range of 1 inch pitch block chain ideal for use on early cycles, starting handles for many cars and pedal chains for early motorcycles. The chain we supply is the laminated type made of laminated steel plates which offers a greater strength than the solid sintered type of chain.

Laminated Chain

Due to the design of this chain the pitch is measured between alternate pins, please see the diagram below which also includes other dimensions.

  • B = Block width
  • D1 = Inner Plate height
  • D2 = Outer Plate height
  • G = Pin diameter
  • H = Pin length or total width
Chain Measurements

The table below shows the dimensions of the four different sizes of 1 inch pitch chain that R M Fowler stock. All dimensions in inches.

Chain RefOther refInside widthInside width (decimal)Inner plate heightOuter plate heightPin diameterPin length or total width
BBD1D2GH
L5022D3/160.190.330.340.1870.39
L5032F1/40.250.330.340.1870.45
L5042S5/160.310.330.340.1870.51
L5052U3/80.380.330.340.1870.58
L5062X1/20.500.330.340.1870.70

Bespoke Sprockets

We can also manufacture sprockets with intricate plate designs and standard pinions, two examples of this are shown below.