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Timken 2MM310WI DUM super precision angular contact ball bearing, duplex set with medium preload (DUM), P4S precision class meeting ABEC 7/9 standards. Back-to-back arrangement provides rigid axial location and accommodates combined radial and thrust loads. Ideal for high-speed, high-rigidity applications including machine tool spindles, precision grinders, and jig borers.
MODEL 2MM310WI DUM
Returnable: Yes
1.063 in C0 - Static Radial Rating (per row)
46200 N
10400 lbf C1 ISO - Dynamic Radial Rating (per row)
70800 N
15900 lbf Cage type
CR - Phenolic Outer Land Riding Cage Contact angle:15 Design units:Metric Inner ring backing diameter:60.7 mm
2.126 in World part number
7310C-T-P4S-DUM
2.390 in Limiting Speed (Grease) (per row)
13600 RPM Limiting speed (oil):27200 RPM Manufacturing part number:2MM310WI DUM O.D. (in):110 mm 4.3307 Outer ring backing diameter:99.8 mm
3.930 in Precision rating
ISO P4S (ABEC 7/9) Rows per set:Duplex Total width:54 mm
Ball type
Steel Bearing width:27 mm
Ball Type
STEEL
Bearing Width
27 mm 1.063 in
Bore
50 mm
C0 - Static Radial Rating (per row)
46200 N 10400 lbf
C1 ISO - Dynamic Radial Rating (per row)
70800 N 15900 lbf
Cage Type
CR - Phenolic Outer Land Riding Cage
Ce - Dynamic Radial Rating (per row)
77900 N 17500 lbf
Contact Angle
15 º
d - Bore
50 mm
D - Outer Diameter
110 mm 4.3307 in
da - Inner Ring Backing Diameter
60.7 mm 2.390 in
Da - Outer Ring Backing Diameter
99.8 mm 3.930 in
Design Units
Metric
DOuter Ring Backing Diameter
99.8 mm 3.930 in
Dynamic Radial Rating (per row)
77900 N 17500 lbf
I.D.
50 mm
Inner Ring 'To Clear' Radius
2 mm 0.079 in
Inner Ring Backing Diameter
60.7 mm 2.390 in
Limiting Speed (Grease) (per row)
13600 rpm
Limiting Speed (Oil)
27200 rpm
Manufacturing Part Number
2MM310WI DUM
Outer Diameter
110 mm 4.3307 in
Outer Ring 'To Clear' Radius
2 mm 0.079 in
Precision Rating
ISO P4S (ABEC 7/9)
R - Inner Ring "To Clear" Radius
2 mm 0.079 in
r - Outer Ring "To Clear" Radius
2 mm 0.079 in
Rows per Set
Duplex
Static Radial Rating (per row)
46200 N 10400 lbf
Total Width
54.000 mm 2.1260 in
World Part Number
7310C-T-P4S-DUM
MEDIUM ISO 03 SERIES
SUPER PRECISION MMV
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 outer rings.
- Balls separated by one-piece cage piloted against a ground thrust shoulder land of the outer ring.
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