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Timken 3MMC9112WI DUM super precision angular contact ball bearing, duplex set with medium preload. P4S-grade ABEC 7/9 precision for high-speed, high-rigidity machine tool spindles, precision grinders, and jig borers. Duplex back-to-back arrangement provides rigid axial location and accommodates combined radial and thrust loads.
MODEL 3MMC9112WI DUM
Returnable: Yes
0.7087 in C0 - Static Radial Rating (per row)
25900 N
1.4174 in World part number
C7012E-T-P4S-DUM
2.650 in Limiting Speed (Grease) (per row)
14640 rpm Limiting speed (oil):29280 rpm Manufacturing part number:3MMC9112WI DUM O.D. (in):95 mm 3.7402 Outer ring backing diameter:88.1 mm
3.470 in Precision rating
ISO P4S (ABEC 7/9) Rows per set:Duplex Total width:36 mm
5830 lbf C1 ISO - Dynamic Radial Rating (per row)
33500 N
7540 lbf Cage type
CR - Phenolic Outer Land Riding Cage Contact angle:25 Design units:Metric Inner ring backing diameter:67.3 mm
Ball type
Ceramic Bearing width:18 mm
Ball Type
Ceramic
Bearing Width
18 mm 0.7087 in
Bore
60 mm
C0 - Static Radial Rating (per row)
25900 N 5830 lbf
C1 ISO - Dynamic Radial Rating (per row)
33500 N 7540 lbf
Cage Type
CR - Phenolic Outer Land Riding Cage
Ce - Dynamic Radial Rating (per row)
36900 N 8290 lbf
Contact Angle
25 º
d - Bore
60 mm
D - Outer Diameter
95.000 mm 3.7402 in
da - Inner Ring Backing Diameter
67.3 mm 2.650 in
Da - Outer Ring Backing Diameter
88.1 mm 3.470 in
Design Units
Metric
DOuter Ring Backing Diameter
88.1 mm 3.470 in
Dynamic Radial Rating (per row)
36900 N 8290 lbf
I.D.
60 mm
Inner Ring 'To Clear' Radius
1 mm 0.039 in
Inner Ring Backing Diameter
67.3 mm 2.650 in
Limiting Speed (Grease) (per row)
14640 rpm
Limiting Speed (Oil)
29280 rpm
Manufacturing Part Number
3MMC9112WI DUM
Outer Diameter
95.000 mm 3.7402 in
Outer Ring 'To Clear' Radius
1 mm 0.039 in
Precision Rating
ISO P4S (ABEC 7/9)
R - Inner Ring "To Clear" Radius
1 mm 0.039 in
r - Outer Ring "To Clear" Radius
1 mm 0.039 in
Rows per Set
Duplex
Static Radial Rating (per row)
25900 N 5830 lbf
Total Width
36 mm 1.4174 in
World Part Number
C7012E-T-P4S-DUM
EXTRA-LIGHT ISO 10 SERIES
HIGH PRECISION MV
Running accuracy, performance and dimensional controls conform to ABEC 7 (ISO P4) requirements.
SUPER PRECISION MM
Running accuracy and performance meet ABEC 9 (ISO P2) levels. Other features conform to ABEC 7 (ISO P4) requirements.
WI CONSTRUCTION
- Incorporates low shoulder on non-thrust side of both inner and outer rings.
- Balls separated by one-piece cage piloted against a ground thrust shoulder land of the outer ring.
- Optional one-piece cage piloted on the ball available with MV (P4) product.
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read moreHow do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
What is the difference between deep groove and angular contact ball bearings?
Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors. Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes. If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read more