Built Like A Tank Cast Iron Spring Pulley For Classical V Belts 5/8 Inch Bore 3/16 X 3/32 Keyway 36 Inch Pound Torque 7 Inch Outside Diameter 4.13 Overall Length Handles Any Job On Conveyors Or Machinery

Heavy Duty Spring Pulley For Classical Belt Drive Systems
✔️ 5/8 bore, 7 inch OD, cast iron body, single groove design

This single cast iron spring pulley adjusts automatic tension on classical v belt drives. Shop mechanics mount it on conveyors, agricultural equipment, and small industrial machines to keep power transmission steady across varying speeds.

✅ Maintains constant horsepower during speed fluctuations
✅ One groove accepts single classical ab profile belts
✅ Resistant alloy handles wear and corrosion outdoors
✅ Precision 5/8 inch bore matches common shaft sizes easily

💡 Why are spring driven idlers considered so handy for vintage machinery?
This little rig takes the guesswork out of drive alignment while holding steady grip.
- Cast iron slab takes impact stress without flinching
- Slim profile slips into cramped bays on old rigs easily
- Steady tension kills belt chatter when throttle gets mashed
- Handy swap beats messy linkage tweaks on your workbench

✝️