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Drive Cables for Mechanical Tachometers

Different tachometer manufacturers have used different end configurations on their drive cables:

Smiths Input: Tachometer drives (driven by the cam, oil pump, or crankshaft) with a Smiths drive have a special thread approximately 1/2" diameter and accept a flat blade-type drive dog on the cable.
0.104" Distributor Drive: Some distributors have a 7/8-20 thread and accept a 0.104" square drive cable.
0.187" Tang, 7/8-18: This drive has a 7/8-18 thread and accepts a 0.187" diameter cable with a small tang on one side of the drive cable.

Jones Output: Jones tachometers have a 7/8-20 thread and accept a heavy-duty SAE square drive on the end of the cable.
Smiths Output: Smiths tachometers have a special thread approximately 1/2" in diameter and accept a square drive cable.
Stewart-Warner Output: Stewart-Warner tachometers have a 5/8-18 thread.

Image
Part No.
Description
Price
Status
Tach Cable, Smiths Input, Jones Output

1381-Size 

Tach Cable, Smiths Input, Jones Output

$59.99In Stock
Tach Cable, Smiths Input (Less Drive Dog), Smiths Output

1382-Size 

Tach Cable, Smiths Input (Less Drive Dog), Smiths Output

$79.99
to
$89.99
In Stock
Drive Dog for Smiths Tach Cable

1383 

Drive Dog for Smiths Tach Cable

$10.49In Stock