NSK RLM304030 needle roller bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Needle roller bearing
- Series
- RLM
We reply promptly.
Tell us the quantity you need and request a quote by WhatsApp or email.
Can't find the exact model? Tell us the part number or model you need. We'll track it down and quote it, whether or not it appears in our catalog.
Description
NSK RLM304030 belongs to needle roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for RLM304030 and any equivalents.
When a machine design leaves little radial room but the shaft still has to carry a heavy radial load, an NSK RLM series needle roller bearing is often the answer. The drawn-cup outer ring keeps the outside diameter small, so the bearing fits into gearboxes, pumps, compressors and similar assemblies without forcing a redesign. MR Industrial Accessories supplies this series to maintenance and purchasing teams in the United States and Latin America, and can help match the size to your shaft.
Reading the RLM code is straightforward once you know the pattern. The digits that come first give the bore diameter in millimeters, and the digits that follow give the overall width. RLM158, for instance, is a 15 mm bore with 8 mm width. RLM815 reverses those figures: 8 mm bore, 15 mm width. RLM912 measures 9 mm bore and 12 mm width. Checking the number against your drawing takes only a moment.
Because the shaft itself acts as the inner raceway, the surface condition matters as much as the bearing choice. Confirm the shaft diameter and the width the housing can accept, then look at the radial load the position will see. Hardness and finish on the shaft have a direct effect on how the bearing performs, and clean lubrication plus proper sealing at the assembly will keep it running. Press the bearing in squarely and avoid shock that could mark the rollers or the cage.
Typical service locations include machine tools, transmissions, oil pumps, compressors, textile machinery, packaging lines and automation equipment. Agricultural and industrial repair work also relies on this series, since compact gear trains and cam mechanisms need load capacity without extra bulk.
Interchange is possible with other manufacturers that use the same dimensional system, provided the dimensions and load rating line up and the cage style suits the application. If your part number comes from a different brand, send it over and we can identify a matching option.
Quotes are handled by WhatsApp or email. Include the full bearing part number, or the bore, width and any other dimensions you have, and the team will respond promptly and help you confirm the right choice.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- How do I read an NSK RLM part number?
- The leading digits give the bore diameter in millimeters and the trailing digits give the width. RLM158 is 15 mm bore by 8 mm width, RLM815 is 8 mm bore by 15 mm width, and RLM912 is 9 mm bore by 12 mm width.
- What should I check before installing an RLM bearing?
- Verify the shaft diameter, available width and expected radial load. The shaft serves as the inner raceway, so its hardness and surface finish need to be right, and the assembly should be lubricated, sealed and aligned before pressing the bearing into place.
- Can MR supply an equivalent if I have another brand's number?
- Yes. Send the part number or the dimensions you need by WhatsApp or email, and the team will reply with a matching option after checking dimensions, load rating and cage type.