NSK NU1040M cylindrical roller bearing
- Brand
- NSK
- Category
- Bearings
- Subcategory
- Cylindrical roller bearings
- Series
- NU
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Decoding NSK NU1040M
- NU 10Series
- Cylindrical roller bearings, NU 10 series. Series differ in outside diameter and width even when the bore is the same.
- 40Bore
- Bore 200 mm (40 × 5).
- MSuffix
- NSK suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
NU 1040 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
NSK NU1040M measures 200 mm across the bore and 310 mm across the outside diameter; its width is 51 mm (200 x 310 x 51 mm).
NSK NU1040M belongs to cylindrical 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 NU1040M and any equivalents.
When you need a bearing that carries heavy radial loads and still lets the shaft expand inside the housing, the NSK NU series is a common choice. It consists of an outer ring, an inner ring, and cylindrical rollers guided between flanges. MR Industrial Accessories supplies this line to customers throughout the United States and Latin America. Just send the part number or the dimensions you need, and our team will get back to you with a quote.
Reading an NU part number is straightforward once you know the pattern. The letters NU describe how the flanges are arranged. The digits that follow form the dimension code, and a trailing M tells you the cage type. Some designations include a slash, as in NU10/500(M), where the number after the slash is the bore diameter in millimeters. If you share the complete designation, we can quote it without back-and-forth.
These bearings show up in gearboxes, centrifugal pumps, industrial fans, rolling mills, and power transmission equipment. You will also find them in machine tools and conveyors where the shaft carries a heavy radial load and needs room to expand. Because the inner ring has no flanges, the NU design permits relative axial movement between shaft and housing. That makes assembly simpler in two-support arrangements that use one fixed and one floating bearing.
Selection comes down to radial load, speed, and the internal clearance your assembly requires. Grease or oil both work as lubricants, depending on operating conditions and temperature. In demanding applications, it pays to specify the cage type and sealing. During installation, keep everything clean, align the supports, and adjust the shaft and housing correctly. If axial loads are present, consider pairing the bearing with another arrangement or ask us about a suitable alternative.
Cross-referencing between manufacturers relies on the designation system and dimensions. An NU code from one brand may match another in size and flange arrangement, but always check the cage, clearance, and tolerances before substituting. If you have the original part number or an unidentified sample, MR Industrial Accessories can identify a compatible option and quote it. Reach us on WhatsApp or by email with the part number or size, and we will reply promptly.
Dimensions
200 x 310 x 51 mm (d x D x B): boundary dimensions for basic designation NU 1040, according to ISO 15.
- Bore
- 200 mm
- Outside diameter (D)
- 310mm
- Width (B)
- 51mm
SKF and other brands, same size
Other brands' pages with basic designation NU 1040: 200 x 310 x 51 mm (d x D x B) per ISO 15.
- Need the SKF NU 1040? We can also quote:NU 1040 MANU 1040 MLNU 1040 ML/C31 more →
- FAGNU1040-XL-M1
- NTNNU1040
- RKBNU 1040
What they share are the ISO 15 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- NSK NU1040M bearing: what are its dimensions?
- NSK NU1040M measures 200 mm across the bore and 310 mm across the outside diameter; its width is 51 mm (200 x 310 x 51 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation NU 1040.
- What does the NU prefix mean in a cylindrical roller bearing?
- NU indicates the flange arrangement: the inner ring has no flanges, while the outer ring does. This allows the shaft to move axially inside the housing, which is common in floating supports and equipment where the shaft expands due to temperature.
- How do I request a quote for an NSK NU bearing?
- Send the full part number, such as NU248M or NU10/500(M), or provide the shaft size, outer diameter, and width. With that information, we will quote the bearing and suggest a compatible alternative if needed.
- Can I replace an NU bearing from another brand with an NSK one?
- In most cases, yes, if the dimensions, flange arrangement, cage, and clearance match. NU designations are consistent across manufacturers, but it is wise to verify tolerances and lubrication. Send us the original part number and we will confirm the cross-reference.