Motor Starters vs. Contactors vs. Overload Relays: What Each One Does and Why You Need All Three
When a motor stops running, the first instinct is to find the part that looks
Availability:
2 in stock
Matched pair of super-precision spindle bearings, 60 x 95 x 18 mm each, 15° contact angle, medium preload, P4S accuracy, phenolic cage — for high-speed machine-tool spindles needing more rigidity than a light-preload set.
List Price
$227.30
2 in stock
2 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
Also Available From:
| MFR / Brand | FAG |
|---|---|
| MPN | B7012CBTP4SDUM |
| Model | B 7012 C B T P4S DUM / 2MM9112WI DUM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 60 mm |
| OD | 95 mm |
| Width | 18 mm |
| Material | High Carbon Chromium Steel |
|---|---|
| Condition | New |
| Preload | Medium (DUM) |
| Base Number | B7012 |
| Industry Terms | spindle bearing pair, matched duplex set, super precision angular contact, FAG B7012, medium preload spindle bearing |
| Application Types | Machine tool spindles, grinding spindles, high-speed milling heads, precision rotary tables |
| Total Width | 36 mm as a mounted pair |
| Bore Shaft Size | 60 mm |
| Mpn Variants | B7012CB.T.P4S.DUM, B7012-C-B-T-P4S-DUM, B7012C.T.P4S.DUM, B7012CTP4SDUM, B7012C, B7012 |
| Manufacturer Status | FAG is part of Schaeffler; current equivalent is the FAG spindle bearing range |
| Arrangement Configuration | Duplex universally ground pair - mountable DF, DB or DT |
| Precision Class | P4S |
| Cage Type | Centered |
| Dynamic Load Rating | 32.5 kN / 7306 lbf |
| Static Load Rating | 30.5 kN / 6857 lbf |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Item Weight | 1.82 lbs |
| Cage Material | Fabric-reinforced phenolic resin |
| Limiting Speed | 16000 rpm |
| Number Of Rows | 1 per bearing, 2 bearings per pair |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15 degrees |
| Design Units | Metric |
| Bearing Material | Bearing steel |
| Part Number | B7012-C-B-T-P4S-DUM |
| Cross Reference 1 | 2MM9112WI DUM (Fafnir / Timken world number, 15 degree, carton marking) |
|---|---|
| Cross Reference 2 | NSK 7012CTYNDUMP4 |
| Cross Reference 3 | SKF 7012 CDGB/P4A (GB = moderate preload) |
| Cross Reference 4 | NTN 7012CGD2GMP4 |
A duplex, universally ground matched pair of FAG super-precision spindle bearings, 60 mm bore by 95 mm outside diameter by 18 mm wide per bearing. The B-prefix range is FAG’s dedicated high-speed spindle family, not an ordinary 7000-series angular contact bearing.
B7012 — FAG spindle bearing, 70 dimension series, 60 mm bore
C — 15° contact angle in FAG’s spindle-bearing scheme (E would be 25°)
B — spindle-bearing execution
T — machined fabric-reinforced phenolic cage
P4S — FAG super-precision class, tighter running accuracy than plain P4
DUM — duplex, universally ground, medium preload; mountable DF, DB or DT without shimming
The carton number 2MM9112WI DUM corroborates the angle from a second scheme: in Fafnir/Timken world numbering a 2MM prefix means 15°, and the MM prefix implies P4S accuracy. Both schemes agree.
The source copy asserted manufacture in the United States. No origin marking is documented, so no country of origin is claimed here. Order-now copy and shipping promises have been removed.
15° is the speed-favouring angle: low friction, low heat, high radial stiffness, modest axial capacity. Medium preload sits between the light grade used in grinding heads and the heavy grade used for roughing — more axial stiffness and better positional hold than DUL, at some cost in top speed and running temperature. Preload grades must never be mixed inside one arrangement; a DUM and a DUL bearing side by side will not share load as designed. The phenolic cage is the enabler for high rpm and tolerates a brief lubricant interruption, but it caps operating temperature.
No FAG-published basic dynamic or static load rating could be verified for this exact designation, so none is stated rather than borrowed from the 25° B7012-E variant, whose ratings differ. Boundary dimensions 60 x 95 x 18 mm per bearing are confirmed; a mounted pair stacks to 36 mm.
Sold as matched pairs of two bearings. Stock is recorded as 2, and on this record that is understood to be pairs rather than individual bearings — ask us to confirm the shelf count before ordering if you need an exact piece quantity. Never split a universally ground pair: the preload only exists as the set.
15° medium-preload equivalents: Fafnir/Timken 2MM9112WI DUM (this carton’s number), NSK 7012CTYNDUMP4, NTN 7012C with GD2GM-type suffixes, SKF 7012 CDGB/P4A (SKF GB = moderate preload). Watch the angle letters — NSK’s A5 is 25° and its plain A is 30°, so 7012A5 and 7012A are not substitutes for a 15° spindle.
$231.30
29 in stock
A shipping cutoff banner measures a vendor’s dock. It tells
When a motor stops running, the first instinct is to find the part that looks
From Caligula’s luxury fleet to modern factories, this is the story of how a single
When sourcing a replacement bearing, you will often find both Timken and SKF options for
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
Sort
Brand
Price
MPN
Categories
