BEARING MART
Overview
Line contact between roller and raceway gives a cylindrical roller bearing far more radial capacity than a ball bearing of the same size. The rib arrangement decides whether the bearing floats axially or locates the shaft, which is what the NU, NJ and NUP letters describe.
What we stock
- NU, NJ, NUP, N and NF designs
- Single row and double row
- Brass and polyamide cage options
- C3 clearance for hot-running duty
Variants
- NU — free axial movement
- NJ — located one direction
- NUP — located both directions
- Single and double row
Applications
Why buy it here
We buy direct from our manufacturing partners, so the price on standard sizes is set at the factory end rather than after three local margins. Stock sits in Dragon Mart 1 twelve hours a day, six days a week, and single pieces are sold on the same terms as cartons.
Not sure which variant you need? Send a photo of the failed part on WhatsApp. The markings on the outer ring — or the bore, outside diameter and width — are enough to identify it.
Areas we serve
Collection from Dragon Mart 1, International City. We supply workshops across Dubai, Sharjah, Ajman, Abu Dhabi and Al Ain, and arrange courier delivery within the UAE.
Questions
NU has no ribs on the inner ring, so the shaft can float axially — use it as the non-locating bearing. NJ locates the shaft in one direction. NUP locates it in both. In a two-bearing shaft you usually want one locating and one floating.
NU cannot. NJ and NUP will take light to moderate thrust through the ribs. If the thrust load is significant you need a different bearing type — talk to us first.
For high speed, high temperature or shock loading, yes. For general industrial duty a steel or polyamide cage is normally adequate and costs less.
Other bearing types
Deep Groove Ball Bearings
The workhorse. Radial loads, high speed, sealed or shielded.
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Insert Bearings & Bearing Units
Agricultural inserts, pillow blocks, flange units and locking collars.
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Tapered Roller Bearings
Combined radial and thrust load. Wheel hubs, gearboxes, heavy shafts.
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Spherical Roller Bearings
Self-aligning, very high radial capacity, tolerant of shaft deflection.
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