Sash Pulleys
Sash pulleys are a core component of any traditional sliding sash window, guiding the sash cord or chain over a wheel to counterbalance the weight of the sash and allow smooth, controlled opening and closing. Whether you are restoring a period property, replacing a worn pulley, or specifying new sash window hardware, getting the right pulley is essential for the long-term performance of the window.
At Ironmongery For You, we stock sash window pulleys in radius end and square end styles, with ball bearing wheels available in a range of sizes and finishes including polished brass, satin chrome, polished chrome, and antique finishes. Fast UK delivery on all orders.
- Polished Brass (5)
- Polished Chrome (4)
- Satin Chrome (4)
- Lacquered Brass (2)
- Pewter Patina (2)
- Aged Bronze (2)
- Antique Pewter (2)
- Polished Marine 316 Stainless Steel (2)
- Beeswax (2)
- Aged Brass (2)
- Burnished Brass (2)
- Polished Nickel (2)
- Satin Brass (2)
- Black (2)
- Satin Marine 316 Stainless Steel (2)
- Zinc Plate (1)
- Galvanised (1)
- Polished Bronze (1)
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Types of Sash Pulley
Radius End Sash Pulleys
A radius end sash pulley has a forend plate with smoothly rounded corners. This profile suits the curved rebates found in many traditional timber sash windows and is a common choice for period and heritage restoration projects. Radius end pulleys are available in a range of finishes to complement original window furniture.
Square End Sash Pulleys
A square end sash pulley has a forend plate with straight, angular corners, giving a cleaner and more contemporary appearance. Square end pulleys are well suited to modern sash window installations and joinery where a sharper profile is preferred.
Ball Bearing Sash Pulleys
Ball bearing sash pulleys incorporate a ball race within the wheel housing, reducing friction and ensuring a smooth, quiet action over the lifespan of the window. They are the preferred choice for both new installations and replacement projects where durability and ease of operation are priorities.
Choosing the Right Size Sash Pulley
Sash window pulleys are sized by wheel diameter and need to be matched to both the depth of the pulley stile and the weight of the sash. Common sizes are 1 3/4 inch, 2 inch, and 2 1/4 inch, with larger wheels generally rated to carry heavier sash weights.
As a guide:
- 1 3/4 inch pulleys are suitable for lighter sashes in smaller windows
- 2 inch pulleys are the most widely used size across standard residential sash windows
- 2 1/4 inch pulleys are recommended for larger or heavier sashes where a greater load rating is required
Always measure the existing pulley housing before ordering a replacement to ensure the correct fit within the pulley stile.
Sash Pulley Finishes
The finish of a sash pulley should coordinate with the other window furniture on the same window, including sash lifts, sash fasteners, and fitch catches. Our range includes:
- Polished brass: the traditional choice for period sash windows, lending warmth to painted timber frames
- Antique brass: a softer, aged appearance suited to heritage and conservation projects
- Polished chrome: a bright, modern finish for contemporary sash installations
- Satin chrome: understated and hardwearing, suitable for both traditional and modern schemes
 Replacing Sash Pulleys
Worn or seized sash pulleys are a common cause of stiff or unbalanced sash windows. If a sash window no longer stays in position, drops unexpectedly, or requires significant effort to raise, replacing the pulleys is often the most straightforward first step before investigating the sash cords or weights.
When replacing sash pulleys, record the existing pulley size and forend style before purchasing. In most cases, a like-for-like replacement will drop into the existing housing without any alteration to the timber. Where the pulley stile has been repaired or replaced, a new housing may need to be cut to size.
Frequently Asked Questions
What is a sash pulley?
A sash pulley is a small wheel-and-housing unit fitted into the top of the pulley stile on each side of a sash window frame. The sash cord passes over the pulley wheel, connecting the sash to a counterbalancing weight concealed within the window box. The pulley allows the cord to run freely so the window can be raised and lowered with minimal effort.
What is the difference between a radius end and square end sash pulley?
The difference is in the shape of the forend plate -- the face plate that sits flush with the surface of the pulley stile. A radius end pulley has rounded corners, which suits the curved rebates cut in traditional timber window frames. A square end pulley has straight corners and is more commonly used in modern joinery or where a cleaner profile is preferred.
How do I know what size sash pulley to order?
Measure the wheel diameter of the existing pulley if it is still in place, or measure the width of the pulley housing in the stile. The three standard sizes are 1 3/4 inch, 2 inch, and 2 1/4 inch. If the window has particularly heavy sashes, opt for a larger size with a higher load rating.
Can I replace just the sash pulley, or do I need to replace the sash cord too?
In many cases both will need attention at the same time. If a pulley has seized or worn significantly, there is a good chance the sash cord has also deteriorated. Replacing both while the window is open saves repeating the job shortly afterwards. Sash cord is available separately and should be matched to the weight of the sash.
Are your sash pulleys suitable for both sash cord and sash chain?
This depends on the individual product. Some pulleys are designed specifically for use with sash cord, while others accommodate sash chain. Check the product description before ordering if you are using chain rather than cord.
Do you supply sash pulleys in trade quantities?
Yes. If you are working across a larger project or restoration programme, contact our team for trade pricing. We supply sash window hardware to joiners, window restoration specialists, contractors, and developers throughout the UK.
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