Full-Ball Type Precision Ball Screw Double-nut Preload Model BNFN Model BNFN
The most common type with a preload provided via a spacer between the two combined ball screw nuts to eliminate the backlash. It can be mounted using the bolt holes drilled on the flange.The Model BNFN-V has improved DN values in comparison with the conventional Model BNFN. (DN values: Small: 100,000, Medium: 130,000)
DN value : 70000
Screw shaft diameter (mm) :
55,63,70,80,100
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| Products | Contents |
|---|---|
| LM Guide | LM rail standard lengths and maximum length, tapped-hole type LM rail, frame for LM rail clamps, steel plate for LM rail clamps, etc. |
| Ball Screw | Axial clearance, maximum manufacturing length of shaft, etc. |
| Actuator | Movable part mass, etc. |
Optional
Contamination Protection
- Contamination Protection Seal for Ball Screws Labyrinth seal
- Contamination Protection Seal for Ball Screws Brush seal
- Wiper Ring
- Canvas seal
- Thin Film Seal
- Dust Cover for Ball Screws
Lubrication
- QZ Lubricator
Rustprevention
- Surface Treatment
Other
- Dimensions of Each Model with an Option Attached
- Additional Machining for Shaft Ends
Display result
- Detailed information
- Dimensional drawing/Dimensional table
- Optional
Detailed information
Dimensional drawing/Dimensional table
Notes on dimensional table
- Note) Model No: Semi-standard products other than BNFN 6310-2.5.
If desiring them, contact THK. - Note) The overall length of the nut will increase when equipping the QZ lubricating device. See Dimensions of Each Model with an Option Attached for further details.
THK Online Services
Member-Exclusive Content
These contents can be accessed
after registering as a member.
Benefit 1: Useful features
-
Easy product comparisonsHighlight feature
-
Save items for laterreview Favorites feature
Benefit 2: Exclusive content
| Products | Contents |
|---|---|
| LM Guide | LM rail standard lengths and maximum length, tapped-hole type LM rail, frame for LM rail clamps, steel plate for LM rail clamps, etc. |
| Ball Screw | Axial clearance, maximum manufacturing length of shaft, etc. |
| Actuator | Movable part mass, etc. |
Optional
No option tag has been selected.
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You can download 2D/3D CAD by clicking on the icon and selecting from the CAD format.
| Model No. | Designer* | Life Calculator* | CAD Download* |
Catalog Download |
Manual Download |
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| BNFN 5510-2.5 |
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| BNFN 5510-5 |
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| BNFN 5510-7.5 |
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| BNFN 5512-2.5 |
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| BNFN 5512-3 |
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| BNFN 5512-3.5 |
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| BNFN 5512-5 |
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| BNFN 5512-7.5 |
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| BNFN 5516-2.5 |
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| BNFN 5516-5 |
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| BNFN 5520-2.5 |
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| BNFN 5520-5 |
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| BNFN 6310-2.5 |
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| BNFN 6310-5 |
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| BNFN 6310-7.5 |
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| BNFN 6312A-2.5 |
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| BNFN 6312A-5 |
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| BNFN 6316-2.5 |
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| BNFN 6316-5 |
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| BNFN 6320-2.5 |
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| BNFN 6320-5 |
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| BNFN 7010-2.5 |
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| BNFN 7010-5 |
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| BNFN 7010-7.5 |
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| BNFN 7012-2.5 |
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| BNFN 7012-5 |
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| BNFN 7012-7.5 |
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| BNFN 7020-5 |
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| BNFN 8010-2.5 |
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| BNFN 8010-5 |
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| BNFN 8010-7.5 |
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| BNFN 8012-5 |
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| BNFN 8020A-2.5 |
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| BNFN 8020A-5 |
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| BNFN 10020A-2.5 |
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| BNFN 10020A-5 |
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| BNFN 10020A-7.5 |
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