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Industrial pulley 350 mm, 4 grooves, section B
- Manufacturer Part Number
- POLEA 350 4B
- Brand
- EMMARIn-house manufacturing
- Category
- Power transmission
- Subcategory
- Pulleys
- Series
- Sección B
In-house manufacturing
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
EMMAR POLEA 350 4B is a pulleys reference, within Power transmission. Request a quote for POLEA 350 4B via WhatsApp or email with the quantity you need; we respond promptly with lead time and equivalents.
The 350 4B pulley is a V-belt transmission pulley, manufactured by EMMAR Accesorios Industriales. It has a 350 mm diameter, 4 grooves and section B, making it suitable for transmitting power in equipment that requires several belts in parallel. It is used in fans, compressors, pumps and production machines. As it is in-house manufactured, you can inquire about variations in diameter, number of grooves or finish according to your application.
This pulley has a 350 mm outside diameter, 4 grooves and section B. Section B corresponds to classic profile V-belts, and the 4 grooves allow distributing the load among several belts, which reduces the stress on each one and improves drive reliability. The 350 mm diameter defines the transmission ratio together with the driven pulley. The part is manufactured at MR with dimensional control so that the belts seat correctly in the grooves.
It is used in belt drives for industrial fans, screw compressors, centrifugal pumps, mixers and production lines. It is also common in mining equipment, treatment plants and factories that need to replace a damaged pulley or modify an existing transmission ratio. Having 4 grooves, it is common in drives that require high power or that work with multiple belts to distribute the load.
To select the pulley, take into account the pitch diameter, the number of grooves and the belt section. Verify that the shaft and keyway match the pulley's machining, and that the center distance allows correct tensioning. If you are replacing an existing pulley, it is advisable to measure the outside diameter, total width and bore diameter. Alignment between pulleys and proper tensioning prevent premature wear of belts and bearings.
If you need a pulley with a different number of grooves, another diameter or a different section, we can manufacture it. Send us the current code or the measurements you have (diameter, grooves, section, shaft diameter) and we will quote an equivalent solution. We can also evaluate special machining, such as keyways or tapered bores, according to your equipment. The idea is that the pulley adapts to your transmission without improvising adaptations at the factory.
To quote this 350 4B pulley or a variant, write to us via WhatsApp and send us the code MR-POLEA-B4-350 or your equipment data. We will respond with the alternatives that best suit your needs.
Dimensions
- Size
- 350mm
- Grooves
- 4
- Section
- B
Frequently Asked Questions
- What does it mean that it is section B?
- Section B is a classic V-belt profile. The pulley has grooves with the shape of that section, so that the belt rests on the flanks. It is important to use section B belts so that contact and transmission are correct.
- Can I request a pulley with a different number of grooves?
- Yes. As it is in-house manufactured, we can make it with 1, 2, 3, 4 or more grooves, and also vary the diameter. Send us your transmission data and we will quote the custom pulley.
- How do I know if this pulley replaces the one I have?
- Compare the outside diameter, number of grooves, belt section and bore diameter with keyway. If those values match, it is compatible. If you have doubts, send us a photo or the measurements and we will advise you.

