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Vehicle Info NeededJR RACE CARPART NUMBER: 574-555-6641
3/4" Jackshaft 12" Long
$4074
Ships on 09/17/2026
Lowest Price GuaranteeJackshafts
- 3/4" Jackshaft 12" Long
3/4" Diameter Jackshaft 12.0" Long. Includes two 3/4 lock collars and one keyway.
- Jackshaft plates are CNC machined from aluminum. The plate is pocket milled to reduce weight without sacrificing strength. The plate has slots for belt adjustment that are 2 1/2" long for a good selection of belts that will work well. Slots also allow the bearing block to move back and forth to adjust driven and sprocket location. Universal clamps are billet aluminum designed to fit 1 1/8" diameter tubing with a minimum 2 7/8" spacing. Bearing blocks are pocketed on under side for weight.
Jackshafts are made from ground and polished stress-proof material for high strength and bending resistance.
Part TypeJackshaft
Product LineJR Race Car Jackshaft/Motor Plate Components
BrandJR RACE CAR
Package Height1.0
Package Width1.0
Package Length12.0
Weight1.61 PG
Part CategoryPerformance Parts
Jackshaft MaterialAluminum
Jackshaft Diameter0.75 in (19.05 mm)
Jackshaft FinishNatural
Part FitmentUniversal
Lock Collar IncludedYes
Jackshaft Length12 in (304.8 mm)
Keyway IncludedYes
Vendor Part Number555-6641
Package Qty1
Package TypeEA
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Some parts are not legal for use in California or other states with similar laws / regulations
