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When a roller chain snaps mid-project or wears through on a conveyor, bike drivetrain, or power transmission system, a mismatched connecting link can cost you hours of downtime. This full buckle roller chain connecting link is engineered for makers, maintenance technicians, and DIY builders who need a secure, tool-friendly solution that holds under load without backing out.
Each connecting link consists of a side plate, two pins, and a full buckle clip — all matched to the chain's pitch and roller dimensions. Available in seven models covering ANSI/ISO chain sizes #25 (04C-1), #35 (06B-1 and 06C-1), #40 (08A-1 and 08B-1), #50 (10A-1), and #60 (12A-1), with pitch ranging from approximately 6.35 mm (1/4 in) for #25 up to 19.05 mm (3/4 in) for #60. Sold in quantities of 1, 10, or 20 pieces.
Typical use cases include repairing or extending roller chains on go-karts and mini bikes, replacing worn connecting links on agricultural equipment and conveyor lines, and building custom chain-driven mechanisms in robotics or CNC projects — all scenarios where a full buckle clip provides the retention confidence that a spring clip alone cannot.
The buckle-style clip locks the side plate firmly onto both pins, resisting vibration-induced loosening that can occur with open-end spring clips.
Seven chain models in one listing — #25, #35 (06B & 06C), #40 (08A & 08B), #50, and #60 — so you can stock the exact size your application demands.
Each link is dimensioned to match the chain's pitch, roller diameter, and inner plate width, ensuring smooth engagement with sprocket teeth.
Surface treatment helps resist rust in moderately humid environments, extending service life on outdoor or lightly exposed machinery.
Order 1 piece for a single repair, 10 pieces for a maintenance kit, or 20 pieces for workshop stock — all at per-unit savings as quantity increases.
The full buckle can be seated and removed with basic hand tools or needle-nose pliers, making field repairs fast without a chain press.
| Product Type | Roller Chain Connecting Link (Full Buckle) |
|---|---|
| Chain Standard | ANSI / ISO Single-Strand Roller Chain |
| Available Models | #25 (04C-1), #35 (06B-1), #35 (06C-1), #40 (08A-1), #40 (08B-1), #50 (10A-1), #60 (12A-1) |
| Pitch Range | 6.35 mm – 19.05 mm (1/4 in – 3/4 in), varies by model |
| Closure Type | Full Buckle Clip |
| Material | See variant options |
| Surface Finish | See variant options |
| Strands | Single (Simplex / -1 suffix) |
| Pack Quantity | 1 Pcs / 10 Pcs / 20 Pcs (select above) |
| Weight per Unit | See variant options |
Match the ANSI or ISO designation stamped on your existing chain or sprocket. ANSI #35 corresponds to ISO 06B or 06C (depending on the plate style), #40 to 08A or 08B, #50 to 10A, and #60 to 12A. If you are unsure, measure the pitch (center-to-center distance between two consecutive pins) and compare: #25 = 6.35 mm, #35 = 9.525 mm, #40 = 12.7 mm, #50 = 15.875 mm, #60 = 19.05 mm.
Both share the same 9.525 mm pitch, but 06B (British Standard) and 06C (Chinese/ISO variant) differ slightly in inner plate width and roller diameter. Check your chain's side plate markings or measure the roller diameter to confirm which standard your chain follows before ordering.
A full buckle (also called a cotter pin or split pin style) wraps around both pins and locks the outer plate in place mechanically. This makes it significantly more resistant to vibration-induced ejection compared to an open-end spring clip, which can work loose under high-cycle or high-speed conditions. Full buckle links are the preferred choice for power transmission applications where chain speed or load fluctuates.
The surface finish provides moderate corrosion resistance suitable for occasional moisture exposure. For continuous outdoor use, wet environments, or chemical exposure, we recommend applying a chain lubricant or grease after installation and inspecting the link periodically. For fully submerged or highly corrosive environments, contact us to confirm suitability.
No — these connecting links are designed for single-strand (simplex, denoted by the -1 suffix) roller chains only. Double-strand (duplex, -2) or triple-strand (-3) chains require connecting links with wider side plates and longer pins. Please verify your chain's strand count before ordering.
A standard chain repair or loop closure requires one connecting link. If you are building a new chain loop from bulk chain, you will need one link per loop. Ordering the 10-piece or 20-piece pack is a cost-effective way to keep spares on hand for future maintenance, especially on equipment with multiple chain drives.
Installation typically requires needle-nose pliers to seat the buckle clip over the pin ends. Removal can be done with a small flat-head screwdriver or pliers to pry the clip free. No chain press or specialized chain tool is required, making these links well-suited for field repairs and quick maintenance tasks.
