Factory Direct Supply of Three Knots Linear Rail Drawer Slides with Adjustable Height

You're looking at a three-knot linear rail drawer slide with adjustable height — we carry these in iron with nickel plating or 304 stainless steel, and the surface finish is either black or blue zinc-plated. The ball bearing mechanism is what keeps the sliding smooth, and the three-knot design gives it decent stability for the weight it's (usually around 30-50 kg depending on length). Most buyers go with the 1.0x1.0x1.2mm thickness for heavier drawers, but the 0.9mm option works for lighter stuff.

Lengths run from 250mm to 600mm, or 10 to 24 inches, and the width is a standard 45mm across the board. The adjustable height feature adds +4.5mm of play — basically a small but useful tolerance if your drawer box dimensions aren't perfectly square. It's not meant for precision cabinetry where you need zero slop, but for general furniture it's fine, we supply COAs with each batch, though HPLC isn't applicable here — it's mechanical parts, not chemicals.

304 stainless is better than the nickel-plated iron for bathrooms or kitchens where humidity is a concern, and we do see a fair number of buyers using these in marine or outdoor furniture application. That said, the black zinc plating holds up okay in moderate moisture — just don't expect it to survive salt spray indefinitely. The three-knot structure (basically three segments of rail) gives more even load distribution than two-knot slides, so it's a solid choice for heavy file drawers or tool chests.

We usually have stock on teh 300mm and 450mm lengths — about 2,000 units or so at any given time — but the 250mm and 600mm ones may need a lead time of 20 days or so if the order exceeds 500 pieces. MOQ is 100 pairs for custom branding on the trademark, but we can ship as low as 50 pairs if you're just testing a run. Packaging is wood crates for bulk orders, or carton and blister for smaller quantities — specify which you prefer and we'll adjust.

Payment terms are typically 30% deposit with 70% against BL copy, or T/T in full for orders under $2,000. We can do L/C at sight if your company has a credit line — just send us your bank details and we'll work it out. One thing buyers often miss: the adjustable height feature requires a specific mounting bracket setup, so if your drawer design doesn't accomodate that, you'll want the fixed-height version instead. our company can provide technical drawings (DWG or PDF) to confirm compatibility before you order.

Anyway, the HS code is 830242, and we'll include the SDS for the zinc plating finish if you need it for shiping documentation. Roughly 4-6 weeks form deposit to delivery for standard orders, but if you're in a hurry, we can expedite for a 10% surcharge on the freight. Don't expect these slides to work silently with particle board — they need solid wood or quality plywood to hold screws properly. That's the gist of it.