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 duplex pair of super-precision angular contact ball bearings, 40 mm bore x 68 mm OD x 15 mm width each, 15° contact angle, ABEC 7, medium preload, phenolic cage. Sold as 2 pieces forming one set.
List Price
$186.72
2 in stock
2 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
Also Available From:
| MFR / Brand | NSK |
|---|---|
| MPN | 7008CTDUMPA7 |
| Model | 7008 C T DUM PA7 / 2MM9108 WI CR DUM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 40 mm |
| OD | 68 mm |
| Width | 15 mm |
| Material | High Carbon Chrome Steel |
|---|---|
| Series | 7000 |
| Condition | New |
| Preload | Medium |
| Base Number | 7008 C |
| Industry Terms | Spindle bearing pair, super precision angular contact, duplex matched set, ABEC 7 bearing, medium preload set, phenolic cage bearing, 40mm bore spindle bearing |
| Common Misspellings | 7008C TDUM PA7, 7008ctdumpa7, 7008 CT DUM PA7, NSK 7008CT DUMPA7, 7008CTDUM-PA7 |
| Application Types | Machine tool spindles, grinding spindles, milling heads, high-speed precision gearboxes, rotary tables, ball screw drive supports |
| Total Width | 30 mm across the matched pair |
| Bore Shaft Size | 40 mm (1.5748 in) |
| Mpn Variants | 7008CTDUMPA7, 7008C T DUM PA7, 7008-C-T-DUM-PA7, 7008CTRDUMP4, 7008CTDUM, 7008C, 7008 C |
| Arrangement Configuration | Duplex universal set (DUM) |
| Precision Class | PA7 (NSK super-precision, ABEC 7) |
| Cage Type | Outer Ring Guided |
| Dynamic Load Rating | 20.9 kN / 4698 lbf |
| Static Load Rating | 11.2 kN / 2518 lbf |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Item Weight | 0.41 lbs |
| Cage Material | Phenolic resin |
| Limiting Speed | 22000 rpm |
| Number Of Rows | 1 per bearing, 2 in the assembled set |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Mounting Arrangement | Back-to-back, face-to-face or tandem |
| Design Units | Metric |
| Part Number | 7008CTDUMPA7 |
| Cross Reference 1 | SKF 7008 CD/P4ADGB |
|---|---|
| Cross Reference 2 | FAG B7008C.T.P4S.DUM |
| Cross Reference 3 | Timken/Fafnir 2MM9108WI CR DUM |
| Cross Reference 4 | NTN 7008CGD2GNP4 |
| Cross Reference 6 | RHP 7008CTDUMP4 |
A matched duplex set of two super-precision single-row angular contact ball bearings, each 40 mm bore, 68 mm outside diameter, 15 mm width, giving 30 mm total width across the pair. The rings are ground as a set so a defined medium preload results when the pair is clamped together.
7008 — single-row angular contact ball bearing, 70 dimension series, bore code 08 = 40 mmC — 15° contact angle in the NSK schemeT — phenolic resin cage, outer-ring land ridingDUM — duplex universal set, medium preloadPA7 — NSK super-precision tolerance class, equivalent to ABEC 7
A 15° contact angle favours speed and radial stiffness over thrust capacity, which is the usual choice for a high-speed spindle position. Medium preload sits between light and heavy: more axial and moment stiffness than light preload, at the cost of higher friction, more heat and a lower speed ceiling.
The phenolic cage is light, self-lubricating and tolerant of marginal lubrication, which is why it is the standard cage for oil-mist and oil-air spindle lubrication. Its low mass reduces cage-pocket loads at high speed.
PA7 tolerances hold bore, outside diameter and running accuracy tight enough for spindle work, with radial and axial runout held to a fraction of the standard-class allowance.
Sale unit: 2 Pcs — one matched duplex universal setSingle row each, two rows in the assembled setTotal width across the pair: 30 mm
The marked ring faces go together in the orientation the factory grind was made for, clamped square against a rigid shoulder so the preload lands as designed. Clamping force passes through the rings, never through the balls. A universal set also arranges back-to-back, face-to-face or in tandem, and the arrangement chosen sets the resulting stiffness and thrust direction.
The ISO base number 7008 C describes a 40 x 68 x 15 mm 15° single-row angular contact bearing. As a medium-preload super-precision duplex set the equivalents are SKF 7008 CD/P4ADGB, FAG B7008C.T.P4S.DUM and Timken/Fafnir 2MM9108WI CR DUM. Same-envelope parts differing in preload grade (DUL light, DUH heavy), cage material or contact angle — 7008 A5 at 25°, 7008 A at 30° — are related sizes rather than interchanges.
$151.78
36 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
