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NTN BST35X72-1BDFTP4 is a precision angular contact thrust ball bearing for ball screws with a 35 mm bore. It features a DFT arrangement (back-to-back pair) and an open design, supporting axial loads in two rows. This bearing is suitable for high-precision machine tool applications requiring rigidity and accuracy.
MODEL BST35X72-1BDFTP4
$1,145.21 Each
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3B
1.7717 in
B (in)
0.5906
Bore Type
Round
Bore type
Round
Cage Material
Resin
Cage material
Resin
Cage Type
Molded
Cage type
Molded
Configuration
Three
Contact angle
60 º
d (in)
1.3780
D (in)
2.8346
d1
2.0630 in
D1
2.3465 in
d2
1.8976 in
D2
2.5079 in
Dynamic Load Rating
11400 lbf
Dynamic load rating
11400 lbf
Enclosure
Open
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
Static Load Rating
31500 lbf
Static load rating
31500 lbf
Type
Ball Screw Support Bearing
Technical Specifications
Type | Ball Screw Support Bearing |
|---|---|
Bore Type | Round |
Material | High Carbon Chrome Steel |
Cage Type | Molded |
Cage Material | Resin |
Precision | ISO Class 4 |
Configuration | Three |
Static Load Rating | 31500 lbf140000 N140.00 kN |
Dynamic Load Rating | 11400 lbf50500 N50.50 kN |
Enclosure | Open |
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 |
3B | 1.7717 in45.000 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.
| Brand | MRO Supply |
| Model | N5601-06-06-06-SS |
