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NTN6940-M-C3Thin Section Deep Groove Ball Bearing – 200 mm ID, 280 mm OD, 38 mm Width, Single Row, Straight Bore, Open, Machined Brass Cage, C3 Internal Clearance

Condition: New

Availability:

5 in stock

Single-row thin-section deep groove ball bearing, 200 x 280 x 38 mm, open, machined brass cage, C3 running clearance, 157 kN dynamic rating.

List Price

Original price was: $529.94.Current price is: $397.46.

5 in stock

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5 in stock

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Specifications

Key Specifications

MFR / BrandNTN
MPN6940-M-C3
Model61940 M C3 142-27-11570
Bearing TypeDeep Groove Ball Bearing, Open
ID200 mm
OD280 mm
Width38 mm

Technical Specifications

MaterialHigh Carbon Chrome Steel
Series6900 Series
ConditionNew
LubricantPreserved
Base Number6940
Industry TermsDeep groove ball bearing, thin section ball bearing, extra large ball bearing, brass cage ball bearing, C3 clearance bearing, 61940 bearing
Application TypesEarthmoving final drives, swing gearboxes, gear reducers, electric motors, machine tool tables, conveyor idlers
Bore Shaft Size200 mm
Mpn Variants6940 M C3, 6940MC3, 6940C3, 6940-M-C3, 61940, 61940 M C3, 61940MC3, 142-27-11570
Compatible With ReplacesKomatsu 142-27-11570
Additional AttributesRadial contact, no contact angle; cross-section 40 mm against a 38 mm width, the near-square thin-section proportion; supplied with rust-preventive preservative, no packed grease; package dimensions 6 x 6 x 4 in
Closure TypeOpen
Min Temp-40°C
Cage TypeMachined
Dynamic Load Rating157 kN / 35296 lbf
Static Load Rating168 kN / 37767 lbf
Precision RatingABEC 1 / P0
Rolling ElementsBall
Max Temp120°C
Item Weight15.65 lb (7.1 kg)
Cage MaterialBrass
Limiting Speed2600 rpm (oil), 2200 rpm (grease)
Number Of Rows1
Bore TypeStraight
Snap Ring IncludedWithout Snap Ring
Internal ClearanceC3
Harmonization Code8482.10.50
Bearing MaterialHigh Carbon Chrome Steel
Running AccuracyP0
Part Number6940-M-C3
Running Accuracy Radial And Axial RunoutP0

Cross-References

Cross Reference 1SKF 6940-M-C3
Cross Reference 2FAG 6940-M-C3
Cross Reference 3ISO 61940 M C3
Cross Reference 4Komatsu 142-27-11570
Seller Part Number: B-CA6#P6V8IL

Product Description

What this part is

NTN 6940-M-C3 single-row deep groove ball bearing. Series 69, the thin-section family. Bore: 200 mm. Outside diameter: 280 mm. Width: 38 mm. Rolling elements: balls, one row, radial contact. Open on both faces.

Decoding the designation

69 series: thin section, a 40 mm cross-section on a 280 mm outside diameter, so the bearing fits where a medium-section 62 or 63 would not. M: machined brass cage, in place of the pressed steel cage used on the standard 6940. C3: radial internal clearance greater than normal. Equivalent ISO designation: 61940. Punctuation and OEM variants in circulation: 6940 M C3, 6940MC3, 6940C3, 61940 M C3, Komatsu 142-27-11570.

What these specs mean in practice

Basic dynamic load rating: 157 kN (35 296 lbf). Basic static load rating: 168 kN (37 767 lbf). Limiting speed: 2 600 rpm on oil, 2 200 rpm on grease. C3 clearance leaves running clearance where the inner ring runs hotter than the outer, or where an interference fit on both rings would otherwise preload the bearing. A machined brass cage tolerates higher temperature, shock loading and marginal lubrication better than a pressed steel cage.

Quantity and configuration

One bearing, complete: inner ring, outer ring, one ball row and the machined brass cage.

Fitting notes

Straight bore, 200 mm. Operating temperature range: -40 °C to 120 °C. Supplied with a rust-preventive preservative, no packed grease. Weight: 15.65 lb (7.1 kg). Cross-section: (280 – 200) / 2 = 40 mm against a 38 mm width, the near-square section that identifies the thin-section series.

Application types

Construction and earthmoving final drives and swing gearboxes, gear reducers, electric motors, machine tool tables and any location where housing bore is fixed and radial space is short. Komatsu part number 142-27-11570.

Interchange guidance

Same-designation equivalents: SKF 6940-M-C3, FAG 6940-M-C3, and the ISO 61940 M C3 form. Related sizes: 6940 (pressed steel cage, normal clearance) and 61940 M (normal clearance, machined brass cage).

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