Our greenhouse curtain cranks allow you to easily roll up your greenhouse sidewall curtains. Simple and reliable manual hand cranks. Choose from single or dual output. Reliable and low-cost ventilation.

Operating your manual ventilation system requires the right greenhouse curtain cranks and mounting method. Get a curtain crank with the correct gear ratio for quick and easy cranking.

Whether you require guide wheels for a curtain operation or mounting plates for a stationary, drive shaft operation, we have the right manual operator for you.

If you have any questions about our manual gear cranks, be sure to contact one of our experts.

Showing 1–9 of 21 results

Single Output, Internal Brake

$125.00$373.00
Manual operator with a 1/2″ square adapter slot and guide wheels. Choose from hand or drill powered and easy rolling

Dual Output, Internal Brake

$185.00$405.00
Dual output, manual operator with a 1/2″ square adapter slot and guide wheels.

Single Output, Hand Brake

$250.00$300.00
Manual operator with 0.625″ output shaft, guide wheels and handle that serves as a brake

Crank Handles

$25.00$45.00
Crank Handles & Drill Cranks, with hook for loop input gears: 7:1, 13:1, and 15:1

Roll Bar Adapters

$15.00$120.00
Roll Bar Adapters that provide the means to couple your roll bar to the gear crank or motor of your

Gear Loop Replacement

$8.00$12.00
Replacement Gear Loops for 7:1, 13:1, and 15:1

48″ Manual Gear Crank 7:1 Gear Box

$225.00
48″ Manual Gear Crank, w/ 7:1 gear box & hand crank (max 500 SF curtain material)