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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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1 in stock
Super-precision angular contact ball bearing, 170 x 260 x 42 mm, 25° contact angle, phenolic outer-ring guided cage, light preload, P4 class.
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$1,498.32
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| MFR / Brand | NSK |
|---|---|
| MPN | 7034A5TRSULP4 |
| Model | 7034 A5 TR SUL P4 / 3MM9134WI / B7034EP4UV |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 170 mm (6.6929 in) |
| OD | 260 mm (10.2362 in) |
| Width | 42 mm (1.6535 in) |
| Material | Chrome bearing steel |
|---|---|
| Series | ISO 70 series (7000) |
| Base Number | 7034 |
| Industry Terms | super precision angular contact bearing, large bore spindle bearing, machine tool bearing, P4 ABEC 7 bearing, phenolic cage bearing, 25 degree angular contact |
| Application Types | Large machine tool spindles, boring mills, precision rotary tables, grinding spindles |
| Bore Shaft Size | 170 mm (6.6929 in) |
| Mpn Variants | 7034A5TRSULP4; 7034-A5-TR-SUL-P4; 7034 A5 TR SUL P4; 7034A5; 3MM9134WI; B7034EP4UV |
| Closure Type | Open |
| Rolling Elements | Steel balls |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Part Number | 7034A5TRSULP4 |
NSK 7034A5TRSULP4 single-row super-precision angular contact ball bearing. Bore 170 mm, outside diameter 260 mm, width 42 mm. ISO 70 series, size 7034, straight bore, open both faces. Made in Japan.
Contact Angle: 25°, from the NSK A5 code. Cage Type: machined, outer-ring guided. Cage Material: fabric-base laminate phenolic, from TR, rated to 120 °C. Grouping: SUL, single universally ground to light preload. Precision Class: P4, ABEC 7. Series: ISO 70. Base Number: 7034.
Dynamic Load Rating Cr: 244 kN. Static Load Rating C0r: 223 kN. Limiting speed: 4,200 rpm on grease, 6,600 rpm on oil-air lubrication. Effective load centre a: 71.1 mm. Permissible axial load Pa: 168 kN. Mass: 7.83 kg.
A 25° contact angle carries substantially more thrust and gives more axial stiffness than a 15° bearing of the same envelope, at a lower speed ceiling. An outer-ring guided phenolic cage runs light and self-lubricating, which is what lets a 170 mm bore turn at 6,600 rpm under oil-air, and it holds up to 120 °C. Light preload removes play while keeping heat generation low. P4 tolerances hold radial and axial runout tight, giving lower running vibration and closer tool location.
One bearing, universally ground to light preload. Universal grinding lets it pair with any other bearing of the same designation back-to-back, face-to-face or in tandem, arriving at the ground preload with no spacer grinding.
Shaft abutment diameter da: 182 mm minimum. Housing abutment diameter Da: 248 mm maximum. Housing fillet radius ra: 2 mm maximum. Chamfer r: 2.1 mm minimum, r1: 1.1 mm minimum. Grease charge: 40 g per bearing.
SKF 7034 ACDGA/P4A is the same size at the same 25° contact angle and light preload class. Fafnir 3MM9134WI-SUL is the Timken cross for this envelope and grouping. GMN S6034CTA and FAG B7034-E-P4-UL cover the same size at 25°.
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