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Drawing of 1203: ⌀17 × ⌀40 × 12 mm⌀40⌀17121203
Fig. 1: 1203, 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 1203

Load: radial medium; axial low, on both sidesSelf-aligning ball

Bearing NACHI 1203

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Specifications

Manufacturer number
Equivalents
5 exact, 2 approximate
d
17 mm
Bore diameter dBearing bore = shaft diameter. Source: supplier data
D
40 mm
Outside diameter DOutside diameter = housing bore. Source: supplier data
B
12 mm
Width BRing width. Source: supplier data
Seal
open, no protection
Clearance
normal clearance
01

Equivalents

the same size 17 × 40 × 12 from other brands

8 products
Series illustration (not a photo of this item): 1203
You are viewingNACHI 1203

Everything the number specifies matches: series 12, 17 × 40 × 12 mm, open, no protection, normal clearance, ordinary steel, design without special letters. The codes in the number are read against the NACHI catalogue.

  • Series illustration (not a photo of this item): 12031203This bearingNACHI17 × 40 × 12available to orderon requestyou are here
  • Series illustration (not a photo of this item): 12031203CT17 × 40 × 12254 pcs€0.43Request a quote
  • Series illustration (not a photo of this item): 12031203KG17 × 40 × 12130 pcs€0.86Request a quote
  • Series illustration (not a photo of this item): 12031203Koyo17 × 40 × 12available to orderon requestRequest a quote
  • Series illustration (not a photo of this item): 12031203NTE17 × 40 × 12available to orderon requestRequest a quote
02

Details

what this bearing is, questions

About the bearing

d×D×Bsize 17 × 40 × 12mm

Self-aligning ball bearing 1203. Under GOST the same bearing is designated 1203.

Frequently asked questions

What is 1203?

It is the same bearing under GOST 3189-89: 1203 corresponds to the ISO base 1203. Size 17 × 40 × 12 mm, a full equivalent of 1203.

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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