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Red angular contact ball bearing 55x120x29mm model 7311

ZIBOO

ZIBOO NTN 7311 Angular Contact Ball Bearing 55x120x29mm Red

SKU CH-6GBR-9Q29N

Angular contact ball bearing measuring 55 by 120 by 29 millimetres for precision rotational applications

  • Labor warranty1 Year
  • Product typeTest Equipment
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Precision angular contact design handles combined radial and axial loads
  • Exact 55 mm bore, 120 mm OD, 29 mm width for direct fit
  • NTN 7311 series engineered for high-speed spindle applications
  • Red finish provides quick visual identification in tool kits
  • Supplied as single unit in protective box for immediate use

NTN 7311 Angular Contact Ball Bearing

The ZIBOO NTN 7311 is a precision angular contact ball bearing designed for electricians and technicians who require reliable rotational performance in test equipment and power tool applications. Its 55mm inner diameter and 120mm outer diameter suit specific shaft and housing fits. The red finish provides visual identification in a tool kit.

Fits 55mm shaft and 120mm housing bores

This single bearing installs directly onto a 55mm shaft and seats within a 120mm housing bore with a 29mm width allocation. It handles combined radial and axial loads in one direction, freeing the assembly from the need for separate thrust components. The supplied box contains one unit ready for immediate fitting.

Sustains combined loads during continuous operation

Under sustained load the contact angle maintains consistent ball-to-raceway engagement, reducing heat buildup compared to radial-only bearings running off-axis. The NTN 7311 construction supports continuous duty cycles in test equipment without the roller skidding seen in lighter assemblies. Lubrication intervals follow standard practice for angular contact types.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $32.99
Cheaper than about 85% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameZIBOO
Model nameNTN 7311
Product typeTest Equipment
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What is the axial-load capacity limit of the 7311 bearing under continuous rotation?

The 7311 angular-contact design handles combined radial and axial loads; sustained thrust capacity depends on the 55 mm bore, 120 mm outside diameter and 29 mm width geometry.

How much heat does the 55x120x29 mm bearing generate during all-day operation?

Heat rise is governed by running speed, lubrication condition and the applied axial load on the 7311's contact-angle surfaces.

Which shaft and housing tolerances must the installer provide for the 7311 bearing?

The 55 mm bore requires a shaft seat to k5 or m5 tolerance and the 120 mm outside diameter needs a housing bore to H7 or J7 tolerance.

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