Industrial pulley 420 mm, 4 grooves, section B
- Brand
- EMMAR
- Category
- Power transmission
- Subcategory
- Pulleys
- Section
- B
- Series
- Sección B
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Description
EMMAR POLEA 420 4B belongs to pulleys, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for POLEA 420 4B and any equivalents.
The EMMAR 420 4B is a V-belt pulley manufactured in-house by MR Industrial Accessories. It mounts on a shaft and drives motion through section B belts. The 420 mm diameter and four grooves let you run multiple belts side by side on one shaft. Typical uses include fans, pumps, compressors and other process equipment that need a set speed ratio.
The code POLEA 420 4B tells you the three key specs: diameter, groove count and belt profile. The 420 stands for the outside diameter in millimeters, the 4 for the number of grooves, and the B for the V-belt section. Section B sets the width and depth of each groove, so the pulley only works with B-profile belts. Because EMMAR makes this pulley in-house, the hub, grooves and balance are checked before it ships.
You will find section B pulleys with multiple grooves on machine tools, screw compressors, centrifugal fans, centrifugal pumps and process lines. They also show up where power must be split among several shafts or where a steady speed is needed. With four grooves, the pulley accepts more than one belt in parallel, which spreads the load and keeps the drive running if one belt breaks.
When mounting, check that the shaft diameter matches the hub bore and that the key fits without play. Align the pulley with the drive pulley using a straightedge or laser alignment. Angular or parallel misalignment speeds up wear on belts and bearings. Set belt tension according to the machine manual; if you do not have it, aim for a small deflection when you press with a finger. If the pulley will turn above 1,500 rpm, verify balancing.
To find an equivalent pulley, send the part number POLEA 420 4B by WhatsApp along with the number of grooves, section and diameter you need. Also include the shaft diameter, keyway type and a photo of the old pulley if possible. With that information, we will suggest a pulley from our line or make one to your dimensions.
MR Industrial Accessories manufactures pulleys, split plummer block housings and ANSI chains, and supplies bearings, power transmission components, seals and lubricants. If the 420 4B is not the right pulley, contact us anyway: we offer pulleys in various sections and diameters. Send the part number or size by WhatsApp or email and we will reply with a quote.
Dimensions
- Size
- 420mm
- Grooves
- 4
- Section
- B
Frequently asked questions
- What does POLEA 420 4B mean?
- The 420 is the outside diameter in millimeters, the 4 is the number of grooves, and the B is the V-belt section. It is a shaft-mounted pulley that transmits motion with B-profile belts.
- What type of belt does this pulley use?
- It uses section B V-belts. With four grooves, you can install up to four belts in parallel. Section B determines the width and depth of each groove.
- How do I request an equivalent pulley or a different size?
- Send the part number POLEA 420 4B by WhatsApp and state whether you want the same size. If you have the shaft diameter, keyway details and a photo of the original pulley, that helps us confirm the equivalence.