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NTN 2A-BST35X72-1BLX#03 is a quadruple-row angular contact thrust ball bearing for ball screws with a 35 mm bore. It features double seals and a nylon cage. The bearing is constructed from high carbon chrome steel and is designed to handle axial loads in precision ball screw applications.
MODEL 2A-BST35X72-1BLX#03
$1,560.12 Each
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4B
2.3622 in
B (in)
0.5906
Ball Material
Steel
Ball material
Steel
Bore Type
Round
Bore type
Round
Cage Material
Nylon
Cage material
Nylon
Cage Type
Fiber Glass Reinforced
Cage type
Fiber glass reinforced
Configuration
Four
Contact angle
60 º
D (in)
2.8346
d (in)
1.3780
D1
2.3465 in
d1
2.0630 in
D2
2.5079 in
d2
1.8976 in
Enclosure
Double Sealed
I.D.
35 mm
Material
High carbon chrome steel
O.D.
72 mm
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision
ISO class 4
r (in)
0.0394
r1
0.0236 in
Seal Material
Nitrile Rubber
Seal material
Nitrile rubber
Seal Type
Contact
Seal type
Contact
Type
Angular Contact Thrust Ball Bearing for Ball Screws
Technical Specifications
Type | Angular Contact Thrust Ball Bearing for Ball Screws |
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Fiber Glass Reinforced |
Cage Material | Nylon |
Ball Material | Steel |
Seal Type | Contact |
Seal Material | Nitrile Rubber |
Precision | ISO Class 4 |
Configuration | Four |
Enclosure | Double Sealed |
Weight | 2.690 lb1.220 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
d | 1.3780 in35.000 mm |
D | 2.8346 in72.000 mm |
B | 0.5906 in15.000 mm |
4B | 2.3622 in60.000 mm |
d1 | 2.0630 in52.400 mm |
d2 | 1.8976 in48.200 mm |
D1 | 2.3465 in59.600 mm |
D2 | 2.5079 in63.700 mm |
r | 0.0394 in1.000 mm |
r1 | 0.0236 in0.600 mm |
Contact Angle | 60 |
How 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.
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