We never sell your data to third parties
Image for Illustration purposes only. Actual product may vary
Timken 3MM9303WI SUH is a super precision angular contact ball bearing supplied as a triplex set with heavy preload (SUH). This ABEC 7 (P4S) precision class bearing is designed for high-rigidity machine tool spindles, boring heads, and applications requiring maximum axial stiffness and minimal runout. The matched triplex configuration provides precise load distribution for demanding industrial and manufacturing equipment.
MODEL 3MM9303WI SUH
$259.75 Each
Prices are subject to change
FREE SHIPPING ON ORDERS OVER $100
Select Quantity
Typically Ships in: 1 day
Returnable: Yes
0.2756 in C0 - Static Radial Rating (per row)
2680 N
0.2756 in World part number
71903E-T-P4S-SUH
0.790 in Limiting Speed (Grease) (per row)
45100 rpm Limiting speed (oil):90200 rpm Manufacturing part number:3MM9303WI SUH O.D. (in):30 mm 1.1811 Outer ring backing diameter:27.5 mm
1.080 in Rows per set
Single Total width:7 mm
600 lbf C1 ISO - Dynamic Radial Rating (per row)
4310 N
973 lbf Cage type
CR - Phenolic Outer Land Riding Cage Contact angle:25 Design units:Metric Inner ring backing diameter:20.0 mm
Ball type
Steel Bearing width:7 mm
Ball Type
STEEL
Bearing Width
7 mm 0.2756 in
Bore
17 mm
C1 ISO - Dynamic Radial Rating (per row)
4310 N 973 lbf
Cage Type
CPhenolic Outer Land Riding Cage
Contact Angle
25 º
Design Units
Metric
DOuter Ring Backing Diameter
27.5 mm 1.080 in
Dynamic Radial Rating (per row)
4740 N 1070 lbf
I.D.
17 mm
Inner Ring 'To Clear' Radius
0.30 mm 0.012 in
Inner Ring Backing Diameter
20.0 mm 0.790 in
Limiting Speed (Grease) (per row)
45100 rpm
Limiting Speed (Oil)
90200 rpm
Manufacturing Part Number
3MM9303WI SUH
Outer Diameter
30 mm 1.1811 in
Outer Ring 'To Clear' Radius
0.3 mm 0.012 in
Rows per Set
Single
Static Radial Rating (per row)
2680 N 600 lbf
Total Width
7 mm 0.2756 in
World Part Number
71903E-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 | MROSupply Fasteners |
| Model | FSTPCK-454380 |
| Brand | Dichtomatik |
| Model | 67065967 |
| Brand | MROSupply Fasteners |
| Model | FSTPCK-721280 |
| Brand | MROSupply Fasteners |
| Model | FSTPCK-701152 |
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read more