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When your conveyor, go-kart, bicycle drive, or light machinery keeps skipping, stretching, or corroding, the root cause is almost always an undersized or low-grade chain. Engineers, fabricators, and DIY builders who need a compact, dependable #25 roller chain will find this 04C-1 transmission chain engineered to perform where it counts — in tight drive systems that demand consistent pitch accuracy and long service life.
This #25 roller chain conforms to the 04C-1 standard with a pitch of 1/4" (6.35 mm). It is available in two materials — a common carbon steel option for general indoor applications and a stainless steel option for environments exposed to moisture, mild chemicals, or outdoor conditions. Length options range from 0.5 m (~1.6 ft) up to 5 m (~16.4 ft), with individual connecting links also available for quick field repairs.
Typical applications include go-kart and mini-bike final drives, small conveyor systems, robotics and automation rigs, bicycle derailleur conversions, and light agricultural equipment — anywhere a compact #25 pitch roller chain for precision power transmission is required.
Manufactured to ANSI #25 / ISO 04C-1 dimensional standards, ensuring drop-in compatibility with matching sprockets and minimal backlash in drive systems.
Choose common carbon steel for cost-effective indoor use, or stainless steel for corrosion-resistant performance in wet, outdoor, or mildly chemical environments.
Available in 0.5 m, 1 m, 1.5 m, and 5 m cuts, plus individual connecting links — order exactly what your project needs without waste.
The 1 PCS connecting link variant lets you close or repair a chain loop in the field without special tools, keeping downtime to a minimum.
The stainless steel variant resists rust and oxidation, making it suitable for food-adjacent machinery, marine environments, and outdoor conveyor applications.
The narrow #25 pitch profile fits tight sprocket centers on go-karts, robotics platforms, and small automation equipment where space is at a premium.
| Chain Standard | ANSI #25 / ISO 04C-1 |
|---|---|
| Pitch | 6.35 mm (1/4") |
| Material Options | Carbon Steel (Common Material); Stainless Steel |
| Available Lengths | 0.5 m, 1 m, 1.5 m, 5 m; Connecting Link (1 PCS) |
| Roller Diameter | See variant options |
| Inner Width | See variant options |
| Breaking Load | See variant options |
| Finish | Natural steel (carbon); Brushed / natural (stainless) |
| Drive Type | Single-strand roller chain (simplex) |
| Compatible Sprocket | ANSI #25 / ISO 04C sprockets, 6.35 mm pitch |
If your application is indoors, dry, and not exposed to chemicals or moisture, the common carbon steel option offers a cost-effective solution. If your chain will be used outdoors, near water, in food-processing environments, or anywhere corrosion is a concern, choose the stainless steel variant for extended service life.
Measure the center-to-center distance between your drive and driven sprockets, then use the standard chain length formula: L = 2C + (N+n)/2 + (N−n)²/(4π²C), where C is center distance in pitches. For most go-kart builds, a 1 m or 1.5 m length is sufficient. Order a connecting link separately to close the loop.
Yes. This chain is manufactured to ANSI #25 / ISO 04C-1 dimensions and will fit any sprocket designed for a 6.35 mm pitch #25 chain. Always verify that your sprocket's tooth profile matches the ANSI #25 or ISO 04C standard before installation.
Stainless steel #25 chains typically have a slightly lower tensile strength than hardened carbon steel chains of the same pitch, but they offer significantly better corrosion resistance. For high-load, high-speed applications in dry environments, carbon steel is preferred. For moderate loads in corrosive or wet conditions, stainless steel is the better long-term choice.
The connecting link is a master link used to join two ends of a roller chain into a closed loop, or to repair a broken chain in the field. It consists of a side plate, two pins, and a clip. No special tools are required — it can be installed and removed by hand or with basic pliers.
Yes. The #25 roller chain is widely used in light conveyor systems, robotics, and small automation equipment. For food-adjacent or washdown conveyor environments, select the stainless steel variant. Ensure your drive speed and load are within the rated capacity for #25 pitch chains before specifying.
For carbon steel chains, apply a light machine oil or chain lubricant to the inner link plates and rollers at regular intervals, especially in high-cycle applications. Stainless steel chains in food or clean environments can be lubricated with food-grade oil. Avoid over-lubrication, which attracts debris and accelerates wear.
