Rotating material of sleeve bore core and frictional
material for two sides all adopt bakelite.
frictional strength is subject to either spring pressure
or cylinder power to decide each torque assembly of
slippage, for easy to control the tension adjustment in
¡´ 3" Outer diameter : £r75.5 mm
¡´ Expanded diameter : £r79 mm/max
¡´ Inside diameter of paper tube : £r76.2 ¡Ó 0.2 mm
(1) Sizes of inside diameter can made by suitable shaft.
(2) Other sizes of outer diameter are available on