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When a roller chain snaps mid-job or needs to be shortened for a new drive application, finding the right connecting link is the bottleneck that stops work cold. Whether you're a maintenance technician keeping conveyor lines running, a fabricator assembling power transmission systems, or a DIYer repairing agricultural or industrial equipment, these simplex roller chain connecting links give you a direct, tool-ready solution across the most common ANSI chain sizes.
Each link is machined to match standard ANSI simplex roller chain dimensions, covering sizes #25 through #80 — corresponding to pitch ranges of approximately 6.35 mm (1/4") to 25.4 mm (1"). Available in stainless steel for corrosion-resistant applications and carbon steel for general-purpose power transmission. Both full link buckle and half link buckle styles are offered, sold in quantities of 1, 2, 3, 5, or 10 pieces per order.
Typical use cases include repairing or extending conveyor drive chains in food processing and packaging lines, replacing worn connecting links on go-kart or motorcycle final drive chains, and assembling custom chain lengths for agricultural machinery, garage door openers, and industrial automation equipment.
Covers #25 through #80 chain sizes (6.35 mm–25.4 mm pitch), matching the most widely used simplex roller chain standards in industrial and DIY applications.
Choose Full Link Buckle for standard chain joining or Half Link Buckle for fine-tuning chain length by half a pitch — both styles available across all models.
Stainless steel variants resist oxidation and moisture, making them suitable for food-grade conveyors, outdoor equipment, and humid or washdown environments.
Carbon steel links deliver solid tensile strength for general-purpose power transmission drives where corrosion exposure is minimal and load demands are moderate to heavy.
Order 1, 2, 3, 5, or 10 pieces per SKU — ideal for single repairs, stocking a maintenance kit, or sourcing spares for fleet equipment.
Each link is manufactured to ANSI B29.1 dimensional tolerances, ensuring consistent fit with standard simplex roller chain inner plates, rollers, and pins.
| Chain Standard | ANSI B29.1 Simplex Roller Chain |
|---|---|
| Available Models | #25, #35, #40, #50, #60, #80 (04C-1, 06B-1, 06C-1, 08A-1, 08B-1, 10A-1, 12A-1, 16A-1) |
| Pitch Range | 6.35 mm – 25.4 mm (1/4" – 1") |
| Material Options | Stainless Steel / Carbon Steel |
| Buckle Style | Full Link Buckle / Half Link Buckle |
| Pack Quantity | 1 / 2 / 3 / 5 / 10 pcs |
| Finish | See variant options |
| Tensile Strength | See variant options |
| Chain Type | Simplex (single-strand) |
| Application | Power transmission, conveyor drives, agricultural machinery, industrial automation |
The chain size is typically stamped on the side plate of your existing chain. ANSI chain numbers correspond to pitch: #25 = 6.35 mm (1/4"), #35 = 9.525 mm (3/8"), #40 = 12.7 mm (1/2"), #50 = 15.875 mm (5/8"), #60 = 19.05 mm (3/4"), #80 = 25.4 mm (1"). Measure the center-to-center distance between two adjacent pins to confirm the pitch before ordering.
A Full Link Buckle (also called a master link) joins two chain ends at a standard pitch interval, maintaining the original chain length. A Half Link Buckle adds half a pitch to the chain, allowing you to fine-tune the total chain length when a full link would leave the chain too loose or too tight. Use a half link when your drive requires an odd number of pitches.
Choose stainless steel if your chain operates in wet, humid, or corrosive environments — such as food processing conveyors, outdoor machinery, or washdown areas. Carbon steel is the standard choice for dry indoor power transmission drives where load capacity and cost efficiency are the priority. Carbon steel links are not recommended for prolonged exposure to moisture without additional lubrication or protective coatings.
These links are manufactured to ANSI B29.1 simplex (single-strand) roller chain dimensions. They are compatible with standard ANSI simplex chains of the matching size number. They are not designed for duplex (double-strand) or triplex chains, or for non-ANSI metric chains. If your chain is a European (DIN/ISO) standard, verify the pitch and roller dimensions match before ordering.
Thread the connecting link pin through the inner plates of both chain ends. Slide the outer plate over the exposed pin ends, then secure the spring clip (cotter pin) with the closed end facing the direction of chain travel. For half links, the same process applies — ensure the half link is oriented correctly relative to chain travel direction. Use chain pliers or a master link tool for a secure, even installation.
It is generally not recommended to reuse a connecting link's spring clip (cotter pin) after removal, as repeated bending can weaken the clip and increase the risk of it disengaging under load. The link body and plates can typically be reused if they show no signs of wear, deformation, or corrosion. For critical or high-load applications, replacing the entire connecting link each time is the safer practice.
For single repairs, 1 or 2 pcs is sufficient. For maintenance kits covering multiple machines or chain sizes, ordering 5 or 10 pcs per size provides a practical buffer. If you operate multiple pieces of equipment with the same chain size, the 10-pcs pack offers the best per-unit value and reduces the risk of downtime from an unexpected chain failure.
