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Drawing of 30311: ⌀55 × ⌀120 × 31.5 mm⌀120⌀55B 29T 31.5C 25α30311
Fig. 1: 30311, end view and section; internal parts simplified per ISO 8826-1. Dimensions in mm

There is no photo of this product: the drawing shows the dimensions of 30311

Combined load at an angle (tapered, high), axial on one sideTapered roller

Bearing NKE 30311

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Specifications

Manufacturer number
GOST number
Equivalents
4 exact, 10 approximate
d
55 mm
Bore diameter dBearing bore = shaft diameter. Source: supplier data
D
120 mm
Outside diameter DOutside diameter = housing bore. Source: supplier data
B
29 mm
Width BRing width. Source: supplier data
T
31.5 mm
Total width TOverall width of an assembled tapered roller bearing. Source: supplier data
Cup width C
25 mm
Cup width CWidth of the outer ring of a tapered roller bearing. Source: supplier data
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Equivalents

the same size 55 × 120 × 31.5 from other brands

14 products
Series illustration (not a photo of this item): 30311
You are viewingNKE 30311

Everything the number specifies matches: series 303, 55 × 120 × 29 mm, ordinary steel, design without special letters. The codes in the number are read against the NKE catalogue.

  • Series illustration (not a photo of this item): 3031130311This bearingNKE55 × 120 × 29available to orderon requestyou are here
  • Series illustration (not a photo of this item): 3031130311CT55 × 120 × 2978 pcs€7.52Request a quote
  • Series illustration (not a photo of this item): 3031130311KG55 × 120 × 29available to orderon requestRequest a quote
  • Series illustration (not a photo of this item): 3031130311NTE55 × 120 × 29available to orderon requestRequest a quote
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Details

what this bearing is, questions

About the bearing

d×D×Tsize 55 × 120 × 31.5mm

Tapered roller bearing 30311. Under GOST the same bearing is designated 7311.

Frequently asked questions

What is 7311?

It is the same bearing under GOST 3189-89: 7311 corresponds to the ISO base 30311. Size 55 × 120 × 31.5 mm, a full equivalent of 30311.

Can I fit another brand instead of this bearing?

Without checking, only an exact equivalent: the size, seal, clearance and design match according to the brand’s catalogue. Positions with the same geometry differ in seal, clearance or design, and each one says so in the equivalents block. Load ratings differ between manufacturers, so for a heavily loaded unit compare C.

How do I get a price and a lead time?

Press “Request a quote” and send the part number and quantity. We reply with the price, availability and delivery terms for your country.

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