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Super-precision angular contact spindle bearing, 65x100x18 mm slim section; 15° contact angle, universally ground with medium preload, ABEC 7 / P4, supplied as half of a duplex pair. For machine-tool spindles, grinders and high-speed motion control.
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| MFR / Brand | RHP |
|---|---|
| MPN | 7013CTDUMP4 |
| Model | 7013 C T DUM P4 / B 7013 X2 TA DUM EP5 / 2MM9113WI CR DUM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 65 mm |
| OD | 100 mm |
| Width | 18 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7000 |
| Condition | New |
| Preload | Medium |
| Base Number | 7013 (ISO) |
| Common Misspellings | 7013CTDUMP4 1/2PR; 7013CTDUMP4-12PR; 7013-C-T-DUM-P4; 7013CTDUM P4; RHP 7013 CTDUM; R.H.P. 7013CTDUMP4; 7013CTDULP4 |
| Application Types | Machine-tool spindles; precision grinding spindles; high-speed motion control; rotary tables and indexers; instrument spindles where axial space is limited |
| Bore Shaft Size | 65 mm (2.5591 in) |
| Mpn Variants | 7013CTDUMP4-1/2PR; 7013CTDUMP4; 7013-C-T-DUM-P4; 7013CTDUM; B 7013 X2 TA DUM EP5; 7013C |
| Manufacturer Status | RHP acquired by NSK; RHP and NSK designations cross-reference directly. Made in England |
| Compatible With Replaces | RHP / NSK-RHP 7013CTDUMP4 halves and Timken 2MM9113WI CR DUM; pair only with another universally ground half of the same designation and preload class - match arrangement (SU/DU) and preload (L/M/H) before substituting |
| Arrangement Configuration | Universally ground, supplied as half of a duplex pair (1/2PR); two halves stack back-to-back (DB), face-to-face (DF) or tandem (DT) without shimming |
| Precision Class | ABEC 7 / P4 |
| Additional Attributes | ISO envelope: 7013 (65 x 100 x 18 mm); Suffix decode - C: 15 degree contact angle; T: machined cage; DUM: duplex universal, medium preload; P4: ABEC 7 precision; -1/2PR: half of a pair, i.e. ONE bearing; Ordering note: a complete DUM duplex set requires two halves; Section note: 18 mm width on a 65 mm bore is a slim-section spindle bearing for space-constrained axial envelopes; Preload positioning: medium gives more axial rigidity than light without the heat generation that limits heavy preload at speed; Alternate designations: B 7013 X2 TA DUM EP5; Timken equivalent: 2MM9113WI CR DUM; Country of manufacture: England; Not published for this reference: dynamic and static load ratings, limiting speed, weight |
| Min Temp | -40°C |
| Cage Type | Phenolic |
| Dynamic Load Rating | 38 kN |
| Static Load Rating | 36.5 kN |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 120°C |
| Item Weight | 0.43 kg |
| Cage Material | Phenolic Resin |
| Number Of Rows | 1 (single bearing, half of a pair) |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Mounting Arrangement | Duplex universal medium preload (DUM) when paired |
| Design Units | Metric |
| Bearing Class | Super precision |
| Internal Clearance | CN |
| Part Number | 7013CTDUMP4-1/2PR |
| Cross Reference 1 | RHP 7013CTDUMP4-1/2PR |
|---|---|
| Cross Reference 2 | 7013-C-T-DUM-P4 (decoded designation) |
| Cross Reference 3 | B 7013 X2 TA DUM EP5 (RHP alternate designation) |
| Cross Reference 4 | Timken 2MM9113WI CR DUM (equivalent super-precision duplex, 65 mm bore) |
| Cross Reference 6 | NSK 7013CTDUMP4 (post-acquisition NSK form) |
This is a super-precision angular contact ball bearing in the 65 mm bore x 100 mm outside diameter x 18 mm width envelope — the ISO 7013 size.
The suffix string decodes as follows: C is a 15 degree contact angle, T is the machined cage, DUM is duplex universal with medium preload, P4 is ABEC 7 precision, and -1/2PR means HALF OF A PAIR.
Check that last point before ordering, because DUM describes the behaviour of two bearings mounted together while 1/2PR means you are buying one of them — a complete duplex medium-preload set requires two.
Universal grinding is what makes that work: any two matched halves stack back-to-back (DB), face-to-face (DF) or in tandem (DT) and arrive at the specified preload with no shimming or custom grinding.
Medium preload sits between light and heavy, giving more axial rigidity and tighter shaft location than light without the heat generation that limits heavy preload at high speed. The 18 mm width in a 65 mm bore makes this a slim-section spindle bearing, chosen where axial space is tight.
RHP is now part of NSK, and this part also carries the designations B 7013 X2 TA DUM EP5 and cross-references to Timken 2MM9113WI CR DUM. Typical duty is machine-tool spindles, precision grinders, high-speed motion control and rotary tables.
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