Product page
Single sprocket with hub, pitch 3/8", 21 teeth
- Manufacturer Part Number
- Piñón simple 3/8" Z21
- Brand
- MROwn brand
- Category
- Power transmission
- Subcategory
- Sprockets and gears
- Series
- paso 3/8"
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We respond promptly.
Request your quote via WhatsApp or email, with the quantity and time frame you need.
Can't find the exact model? Write to us with the part number or model you're looking for: we'll find it and quote it, even if it's not listed in the catalog.
Description
MR Piñón simple 3/8" Z21 is a sprockets and gears reference, within Power transmission. Request a quote for Piñón simple 3/8" Z21 via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
The simplex sprocket with hub, 3/8" pitch and 21 teeth is a power transmission component that mounts on the shaft and meshes with the chain to transmit motion. Its hub allows securing it with a set screw or key. It is supplied by MR and is designed for replacements in machines and equipment where a durable sprocket with reliable dimensions is needed.
This item is a simplex sprocket with hub, 3/8" pitch and 21 teeth (Z21). It is manufactured in SAE 1045 steel, a material with good machinability and wear resistance. The hub facilitates mounting on the shaft and allows securing it with a screw or key. The designation Simplex sprocket 3/8" Z21 indicates the chain pitch and the number of teeth, key data for it to mesh correctly with the chain and the driven wheel.
It is used in chain drives for agricultural machines, conveyors, packaging equipment, water wheels and motion systems in general. It is commonly found in applications requiring a specific transmission ratio and simple mounting on small-diameter shafts. Its construction in SAE 1045 steel makes it suitable for continuous service with adequate lubrication.
To select the correct sprocket, verify that the chain pitch matches 3/8" and that the number of teeth is suitable for the desired transmission ratio. Check the shaft diameter and the hub fastening system. During mounting, align the sprocket with the sprocket wheel to avoid uneven wear and noise. Correct lubrication extends the service life of the assembly.
If you need a sprocket with a different number of teeth, another pitch or a different size, we can supply it or find the equivalent. To do so, send us the part number MR-PINON-SIMPLE-3-8-Z21 or the full designation via WhatsApp and we will advise you. We can also quote a nearby size if the one you are looking for is not in our catalog.
At MR Accesorios Industriales we supply this type of sprocket and have more than 80 years of experience in power transmission. If you have doubts about compatibility with your equipment, write to us via WhatsApp with the product part number and we will help you find the solution. We are here to advise you.
Dimensions
- Pitch
- 3/8"
- Teeth (z)
- 21
- Material
- SAE 1045 steel
- Type
- Single sprocket with hub
Frequently Asked Questions
- What does it mean that it is supplied by MR?
- It means that MR Accesorios Industriales supplies it, does not manufacture it. That allows us to offer you the product with the quality and dimensions you need. Ask us via WhatsApp.
- Can I order a sprocket with a different number of teeth?
- Yes, we can supply sprockets with different numbers of teeth and pitch. Send us the specifications via WhatsApp and we will quote you.
- How do I know if this sprocket is compatible with my chain?
- You must verify that the chain pitch is 3/8" and that the number of teeth matches the transmission ratio you need. If you have doubts, ask us.

