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Timken 3MMC9312WI SUH super precision angular contact ball bearing triplex set with medium preload, ABEC 7 (P4S) precision. Matched set of three bearings for high rigidity and accuracy in machine tool spindles, precision grinders, and high-speed applications requiring exceptional runout control and load capacity.
MODEL 3MMC9312WI SUH
$782.02 Each
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Returnable: Yes
0.5118 in C0 - Static Radial Rating (per row)
16900 N
0.5118 in World part number
C71912E-T-P4S-SUH
2.570 in Limiting Speed (Grease) (per row)
16500 rpm Limiting speed (oil):33000 rpm Manufacturing part number:3MMC9312WI SUH O.D. (in):85 mm 3.3465 Outer ring backing diameter:80.2 mm
3.160 in Precision rating
ISO P4S (ABEC 7/9) Rows per set:Single Total width:13 mm
3800 lbf C1 ISO - Dynamic Radial Rating (per row)
19500 N
4380 lbf Cage type
CR - Phenolic Outer Land Riding Cage Contact angle:25 Design units:Metric Inner ring backing diameter:65.3 mm
Ball type
Ceramic Bearing width:13 mm
Ball Type
Ceramic
Bearing Width
13 mm 0.5118 in
Bore
60 mm
C1 ISO - Dynamic Radial Rating (per row)
19500 N 4380 lbf
Cage Type
CPhenolic Outer Land Riding Cage
Contact Angle
25 º
Design Units
Metric
DOuter Ring Backing Diameter
80.2 mm 3.160 in
Dynamic Radial Rating (per row)
21400 N 4820 lbf
I.D.
60 mm
Inner Ring 'To Clear' Radius
1 mm 0.039 in
Inner Ring Backing Diameter
65.3 mm 2.570 in
Limiting Speed (Grease) (per row)
16500 rpm
Limiting Speed (Oil)
33000 rpm
Manufacturing Part Number
3MMC9312WI SUH
Outer Diameter
85 mm 3.3465 in
Outer Ring 'To Clear' Radius
1 mm 0.039 in
Precision Rating
ISO P4S (ABEC 7/9)
Rows per Set
Single
Static Radial Rating (per row)
16900 N 3800 lbf
Total Width
13 mm 0.5118 in
World Part Number
C71912E-T-P4S-SUH
SPINDLE BEARINGS ULTRA-LIGHT ISO 19 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 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.
| Brand | Thomson Linear |
| Model | QSCP 1/2 L 12 |
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read more