Sliding Window Roller Pulleys — Replacement Wheels for PVC, Aluminum & Screen Window Tracks A worn or seized window roller makes sliding windows stiff, noisy, and difficult to open—especially on larger panels where the full weight of the sash bears down on the pulley. These sliding window roller pulleys replace the original hardware and restore smooth, low-effort operation without replacing the window frame. Available in eight models covering the most common sliding window track profiles: MLQ-868TL copper wheel for standard door and window tracks, aluminum alloy screen pulley, white plastic yarn wheel, steel shell plastic yarn wheel, MLQ-88TO concave wheel for 88-type PVC windows, MLQ-77AL double copper concave wheel for 77/80-type plastic steel windows, MLQ-77PL plastic steel window pulley for 77/80-type frames, and MLQ-88TP double brass pulley for 88-type plastic steel windows. All variants use a stainless steel body. Use them to replace worn rollers on bedroom, living room, kitchen, or balcony sliding windows—or to fit new window installations where the original pulleys are missing or incompatible. ✅ Compatible with 77/80-type, 88-type, and 868-type PVC plastic steel windows, aluminum alloy frames, and screen window tracks — select the model that matches your window profile ✅ Key Features of These Sliding Window Roller Pulleys 🔩 Stainless Steel Body: All variants use a stainless steel housing that resists corrosion and deformation in humid environments—suitable for kitchens, bathrooms, and outdoor-facing window frames. ⚪ Ball Bearing Smooth Roll: High-quality bearing system reduces rolling friction so windows open and close with minimal effort—particularly noticeable on larger or heavier sliding sashes. 🔇 Silent Operation: Bearing and wheel material combination absorbs vibration during sliding—reduces noise for bedrooms, studies, and any room where quiet operation matters. 🔳 Eight Model Options: Covers copper wheel, brass wheel, plastic yarn wheel, concave wheel, and double-wheel configurations across 77/80, 88, and 868 window profile types—select the model that matches your existing track and frame. 🎨 Multiple Wheel Materials: Copper, brass, and plastic yarn wheel options suit different track materials and load requirements—copper and brass for metal tracks, plastic yarn for lighter aluminum and screen frames. 🔧 Screwdriver Installation: Mounts to the window sash bottom or side with standard screws—no specialist tools required. Align with the track, tighten, and test the slide before finalizing. 🎯 Who Is This For? 🪟 PVC Plastic Steel Window Replacement Replacing worn rollers on 77/80-type or 88-type PVC plastic steel sliding windows—choose the matching MLQ model for your window profile to ensure correct track engagement. 🏗️ Aluminum Frame & Screen Window Repair Restoring smooth operation on aluminum alloy sliding windows or screen windows where the original plastic or yarn wheels have worn flat or cracked. 🏠 New Window Installation Fitting pulleys to a new sliding window frame where the original hardware is missing or needs upgrading—the eight model range covers the most common residential window track profiles. Body Material Stainless steel Wheel Material Options Copper, brass, plastic yarn, aluminum alloy Compatible Window Types 77/80-type PVC, 88-type PVC, 868-type, aluminum alloy, screen windows Available Models MLQ-868TL, Aluminum alloy screen pulley, White plastic yarn wheel, Steel shell plastic yarn wheel, MLQ-88TO, MLQ-77AL, MLQ-77PL, MLQ-88TP Wheel Configuration Single wheel and double wheel variants available Installation Method Screw-mount with standard screwdriver Application Bedroom, living room, kitchen, balcony sliding windows; curtain track rollers; cupboard sliding doors ❓ Frequently Asked Questions How do I identify which model fits my window? Check the profile type of your window frame—most PVC plastic steel windows are labeled 77/80-type or 88-type based on the frame width in millimeters. If you have a 77 mm or 80 mm wide frame, choose an MLQ-77 variant. For 88 mm frames, choose an MLQ-88 variant. For standard aluminum or screen windows, choose the aluminum alloy screen pulley or plastic yarn wheel. If unsure, remove the existing roller and compare its dimensions to the product images. What is the difference between copper wheel, brass wheel, and plastic yarn wheel variants? Copper and brass wheels are metal and suit heavier sashes and metal tracks—they provide more load capacity and durability under frequent use. Plastic yarn wheels are lighter and quieter, suited to aluminum alloy and screen window tracks where a softer wheel reduces track wear. Double-wheel variants (MLQ-77AL, MLQ-88TP) distribute the sash weight across two contact points for heavier panels. Will these rollers fit aluminum alloy windows? Yes. The aluminum alloy screen pulley and white plastic yarn wheel variants are specifically suited to aluminum frame and screen window tracks. The MLQ-868TL copper wheel also fits standard aluminum door and window tracks. Confirm the track channel width matches the wheel width before installing. How do I install the replacement roller? Remove the window sash from the frame. Locate the existing roller housing at the bottom of the sash and unscrew the mounting screws. Remove the old roller and insert the new one in the same position. Tighten the screws, reinstall the sash in the track, and test the slide. Adjust the roller height if the sash does not sit level in the frame. How do I maintain the rollers to keep them running smoothly? Clean the roller wheel and track channel regularly to remove dust, grit, and debris that cause friction. If rolling resistance increases, apply a small amount of silicone lubricant to the wheel and bearing. Avoid oil-based lubricants on plastic yarn wheels as they can degrade the material over time. Can these rollers be used on cupboard or wardrobe sliding doors? Yes. The MLQ-868TL and plastic yarn wheel variants are suitable for lightweight cupboard and wardrobe sliding door tracks in addition to window applications. Confirm the track profile and channel width match the roller dimensions before ordering for non-window use. 🛒 Select your model above, then add to cart.
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