Before anybody gets their hopes up, I just finished checking out the current
ACL Bearings catalog and they currently only offer tri-metal bearings for
con-rods of the 4 Pot TR motors. The breakdown is as follows:
Spitfire:
Mains: F820 Material
Con-Rods: F820 Material
TR 4-pot:
Mains: F23 Material
Con-Rods: F780 or F23 Materials (two part numbers)
TR 6-pot (Tr250/6, GT6)
Mains: F820 Material
Con-Rods: F820 Material
MATERIAL CODES
F23 (Whitemetal) = Cast whitemetal, lead based, steel backed.
NOMINAL COMPOSITION: 83% Lead, 15% Antimony, 1% Tin.
F780 (Tri-Metal) = Sintered copper lead, lead plated, steel backed.
NOMINAL COMPOSITION: 74% Copper, 24% Lead, 2% Tin.
F820 (Alutin) = Rolled aluminium-tin, steel backed.
NOMINAL COMPOSITION: 79% Aluminium, 20% Tin.1% Copper
Hugh Barber
Hollister, CA
'73 TR6
|