The best greenhouse roll-up crank depends on your vent layout, pipe size, and how much sidewall or roof film you need to move. The UYGALAXY two-piece set is suited to buyers who need a pair of sidewall cranks, while its single-unit version fits a one-crank setup. Farm Plastic Supply is a useful option for shoppers prioritizing stainless steel construction. For roof film, the UYGALAXY roof unit is designed for chain operation; the unbranded two-piece crank lists specific pipe sizes for compatibility.
| Product | Best For | Key Detail |
|---|---|---|
| UYGALAXY 2PCS Sidewall Winch | Two sidewall locations | Self-locking; 4:1 gear ratio |
| UYGALAXY Sidewall Winch | One crank location | Listed maximum roll length of 393 feet |
| Farm Plastic Supply 2-Pack | Stainless steel preference | Weather-resistant construction |
| UYGALAXY Roof Unit | Roof film operation | Chain-operated; 262-foot maximum roll length |
| 2PCS Sidewall Crank | Specified pipe setups | Fits 3/4-inch EMT or 1-inch OD pipe |
UYGALAXY Two-Piece Sidewall Winch
This two-piece set is best for a greenhouse with two sidewall sections to operate. Each manual winch uses a 4:1 gear ratio, so four turns of the crank correspond to one turn of the film tube, according to the listed product details. A self-locking mechanism with an automatic brake is designed to hold the sidewall in place when cranking stops.
The listed maximum roll length is 393 feet, and the maximum roll height is 4.9 feet. Choose this set if those stated limits suit your installation and you need two cranks. Confirm your tube and mounting arrangement before ordering; the provided details do not specify pipe compatibility.
UYGALAXY Single Sidewall Winch
This UYGALAXY model is best for a single operating point or a project where only one crank is needed. Its listed features match the brand’s two-piece version: a 4:1 gear ratio, self-locking operation, and an automatic brake to hold the sidewall in position.
The product information gives a maximum roll length of 393 feet and a maximum roll height of 4.9 feet. It is a straightforward choice when those capacity limits match the planned vent. Avoid assuming it fits a particular pipe size without checking the installation requirements, because pipe dimensions are not provided in the supplied features.
Farm Plastic Supply Stainless Steel 2-Pack
This two-pack is best for buyers who want stainless steel construction and a crank described as weather resistant. The listed 4:1 gear ratio is intended to make manual sidewall rolling easier. The product description says the winch can be left exposed to rain, snow, and sun.
Choose this set if construction material and outdoor exposure are important considerations for your greenhouse. The supplied details do not state a maximum film roll length or height, so compare the product’s installation information with your vent dimensions before selecting it. The listing also does not specify pipe compatibility.
UYGALAXY Chain-Operated Roof Unit
This unit is best for buyers seeking a roof-film roll-up device rather than a standard sidewall hand crank. It operates by chain and lists a 13-foot circumference chain. Its 4:1 gear ratio means four turns of the blue pulley roll the film tube one turn, according to the product details.
The stated maximum roll length is 262 feet, and the chain-operable height is 6.5 feet. The unit lists bidirectional self-locking. Choose it if your roof layout and operating height align with those specifications. Check the chain reach and mounting requirements before purchase, since other installation dimensions are not included in the supplied information.
Two-Piece Crank With Pipe Fit Details
This two-piece set is best for buyers whose greenhouse uses 3/4-inch EMT or 1-inch outside-diameter pipe. The listed compatibility details make it easier to compare with a known pipe size. It also features a 4:1 gear ratio for manual film lifting and an automatic mechanical brake that locks the position when cranking stops.
Choose this option when its stated pipe fit matches your setup and you need two sidewall cranks. The supplied features do not list a maximum roll length or roll height, so verify capacity for your greenhouse before buying. “Most” high-tunnel and hoop-house structures is not a substitute for checking the actual pipe dimensions.
Buying Guide: How To Choose A Greenhouse Roll-Up Crank
Do you need a sidewall crank or a roof unit?
Start by identifying what the crank will move. Sidewall winches are intended to roll greenhouse sidewall film for ventilation. The UYGALAXY roof unit is described as a chain-operated film coiler for roof use. Do not assume a sidewall model is suitable for a roof installation; compare its intended use and mounting arrangement with your structure.
How many cranks should you buy?
Match the quantity to the number of operating points you plan to control. A one-piece product can suit a single vent location, while a two-piece set may be more convenient when two cranks are required. Check what the listing includes rather than assuming a product name or photograph indicates the package quantity.
What do the gear ratio and brake do?
A 4:1 ratio means the crank or pulley turns multiple times to rotate the film tube once, which provides mechanical advantage for manual operation. Self-locking or brake features are intended to keep the film position from changing when you stop cranking. These features do not establish a product’s capacity for every greenhouse size.
Which measurements should you check?
Measure pipe diameter, roll length, film travel height, and the available operating space. The two-piece crank with pipe-fit details lists compatibility with 3/4-inch EMT or 1-inch OD pipe. Other products provide roll limits but not pipe dimensions. Confirm all relevant measurements against the product’s current installation information before ordering.
Frequently Asked Questions
What is a greenhouse roll-up crank used for?
It manually rolls greenhouse film up or down, commonly to open or close a sidewall for ventilation.
Is a 4:1 gear ratio easier to crank?
The ratio provides mechanical advantage: four crank or pulley turns produce one film-tube turn, as described in the listed features.
Will a self-locking crank hold the film in place?
The listed self-locking and brake features are designed to hold the sidewall position when cranking stops. Confirm the product’s stated specifications for your setup.
Can a sidewall winch operate greenhouse roof film?
Not necessarily. The products have different stated uses; select a roof unit when your installation requires a roof-film coiler, and check mounting requirements.
How do I know if a crank fits my greenhouse pipe?
Measure the pipe and compare it with the listed compatibility details. Only one product here specifically states fit for 3/4-inch EMT or 1-inch OD pipe.