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BCA
Drawing of 311: ⌀55 × ⌀120 × 29 mm311
Fig. 1: 311, end view and section; rolling element geometry per the NSK catalogue. Dimensions in mm

There is no photo of this product: the drawing shows the dimensions of 311

Load: radial medium; axial low, on both sidesDeep groove ball

Bearing BCA 311

€77.89per piece
Available to orderThe manager confirms the lead time
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Specifications

Manufacturer number
ISO designation
Equivalents
5 exact, 37 approximate
d
55 mm
Bore diameter dBearing bore = shaft diameter. Source: two supplier sources
D
120 mm
Outside diameter DOutside diameter = housing bore. Source: two supplier sources
B
29 mm
Width BRing width. Source: two supplier sources
Seal
open, no protection
Clearance
normal clearance
m
1.5 kg
MassWeight of the product. Source: supplier data
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Equivalents

the same size 55 × 120 × 29 from other brands

44 products
Drawing: 311
You are viewingBCA 311
€77.89baseline for the price comparison

Everything the number specifies matches: series 3, 55 × 120 × 29 mm, open, no protection, normal clearance, ordinary steel, design without special letters. The codes in the number are read against the BCA catalogue.

Under the price: the difference from the price of this bearing (€77.89).
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Details

what this bearing is, questions

About the bearing

D 120d 55B 29
d×D×Bsize 55 × 120 × 29mm
mweight 1.5kg

Deep groove ball bearing 6311. Under GOST the same bearing is designated 311.

M: BCA data. Another brand publishes its own figures, so compare them against that brand’s catalogue.

Frequently asked questions

What is 311?

It is the same bearing under GOST 3189-89: 311 corresponds to the ISO base 6311. Size 55 × 120 × 29 mm, a full equivalent of 6311.

Will 311 C3 fit instead?

Same size, clearance greater than normal. C3 is used where the bearing runs hot or sits on the shaft with an interference fit. If the old bearing is not marked C3, take this one.

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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