30.6mm Adjustable Sliding Door Carriage & Roller – Suits Boral® Windows

A direct replacement adjustable sliding door carriage & roller for windows. Multi-link. Acetal flat roller and plastic axle pin. Replaces the old model. Suits Boral® BST.

Key Features

• Acetal construction
• Overall 30.6 x 15.8mm
• Australian stock, dispatched within 1 business day

Fits & Replaces

• Direct replacement for Boral® BST and most other Australian aluminium sliding window carriages of this pattern.
• Fit is decided by the 30.6mm carriage length and the 15.8mm body width, and by the flat roller profile — measure your old carriage across both before ordering
• Print the Actual Size Identifier below and lay your old part straight onto it — that confirms the fit in seconds
• Also available as our 8mm Sliding Door Carriage & Acetal Roller, Multi Link Plastic 2 Pack (SKU CAR8PLA29)

Specifications

• TradeBase SKU: CAR31ACE
• Material: Acetal
• Overall size: 30.6 x 15.8mm

Installation Tips

• Check the track before you fit. File any burrs or flat spots smooth — a damaged track will chew out a new roller within weeks.
• Clean all grit and old grease out of the track. Grit is what kills a roller, not load.
• Replace carriages in pairs. A new roller running against a worn one carries uneven load and both wear out early.
• Fit the rear carriage first, then set the front carriage to get your clearance.
• Adjust last to bring the sash parallel with the frame, working from the lock side.
• Slide the sash through its full travel before refitting stops or flyscreens.

Care & Maintenance

• Use a dry lubricant only — silicone or dry PTFE. Oil and grease hold dust and grind the roller.
• Sweep the track out every few months, more often in coastal or dusty areas.

Warranty

Covered by our 12-month warranty and your rights under the Australian Consumer Law.

Check the fit before you buy

Download the TradeBase Actual Size Identifier (PDF) and print it on A4 at 100% / Actual size — not Fit to page. The part is reproduced at true 1:1 scale on a 10 mm grid and measures 30.6 mm overall. Lay your existing part straight onto the page to confirm it matches. A calibration bar on the sheet lets you check the printer has not scaled the page.