What is the model of the chain sprocket?
3 Answers
Here is an introduction to the model of chain sprockets: 1. Chinese sprocket classification standards: In China, sprockets are classified based on imperial units. They are divided into 3/8, 1/2, 5/8, 3/4, etc., and also include single, double, triple, and quadruple rows, etc. The row spacing for double, triple, and quadruple rows is manufactured according to national standards. Additionally, there are sprockets with models denoted by letters A and B, where A represents plate sprockets and B represents table sprockets. In the model B1-2-3, the numbers 1, 2, and 3 represent single, double, and triple rows, respectively. The tooth thickness varies for sprockets of different sizes. 2. Chain transmission method: Sprockets are driven by chains, and the model units are generally imperial. They come in single, double, and multiple rows. They are suitable for low-speed, heavy-load, and high-temperature conditions. Compared to gears, they can be used in situations where the distance between two shafts is relatively large. Gears transmit power through meshing, and the model units are mostly metric, represented by modulus. They can transmit a wide range of power and speed. Their compact structure allows for large transmission ratios, high efficiency, and long service life.
I've been repairing cars for over a decade, and chain sprocket models can be quite complicated. Different brands and model years use different specifications - Toyota might use RS50E while Honda could be D6HX. You must first check the engine displacement, as chains for 2.0L and 1.5L engines are completely different. When I worked on an old Accord last time, the chain was stamped with TDC25Y. The most reliable method is to remove the old chain and check the side markings, or consult the vehicle service manual. Never buy parts blindly - if the model is wrong, the chain will stretch and skip teeth within three months, leading to piston-valve collision disasters. Also pay attention to chain tensioner orientation during installation - I once saw a rookie install it backwards and the chain snapped immediately.
Last year my bike chain was rattling, and upon disassembly, I found the sprockets were worn sharp. The model number isn't universal—you have to check the parts catalog using the last six digits of the frame number. For example, most Volkswagen 1.4T models use part numbers starting with 06H, while older Buicks use the AF30 series. If you're checking yourself, look for the laser-etched code on the side of the chain. My Mazda, for instance, has F8KE-00 engraved. Avoid off-brand chains—I once used a cheap one that stretched 2mm after just 5,000 km, making a tractor-like clattering noise during cold starts. Now I only use Japanese DID or German Iwis chains. They're pricier but last over 100,000 km without issues.
