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BNK 12~
THK BNK Precision Ball Screws

   Material   

Nut hardness

Shaft hardness

SCM415

HRC22 - 34

Turning the face
HRC58 - 64
End of shaft end
HRC22 - 34
Video  3D view Specification of product PDF
  
BNK
 
 
 
 
 
 
 
 
      
※ Please refer to the specifications for details.
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 How to order?
How to order

 

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Unit : mm

 

O.D.

Lead

No.

gasket

Clearance
symbol

L

Accuracy

Shaft

S

Threading
direction

Ball
diameter

No.

Circulation
method

Axial
clearance

Preload

Basic load rating

Mass

 

of

Designated

end

of

torqe

Ca

Ca

Nut

Shaft

 

loop

units 1mm

Finish

circuits

Ncm

(Dynanic)kN

(Static state)kN

 

12

O2

3

RR

G0

154~354

C3

Y

L-69

Right

12.3

1 turn
X
3 rows

Deflector

0

0.98
~3.4

1.7

3.6

0.05
kg/m

0.71
kg

 

C5

 

G2

C7

0.02 or less

 

12

O5

2.5

RR

G0

180~380

C3

Y

L-70

Right

12.3

2.5 turn
X
1 rows

Deflector

0

0.98
~4.9

2.3

3.2

0.22
kg/m

0.61
kg

 

C5

 

G2

C7

0.02 or less

3.7

6.4

 

12

O8

2.6

RR

G0

180 ~ 380

C7

Y

L-70

Right

12.65

2.6turn

X 1 rows

Deflector

0.02 or less

4.7

7.5

0.269
kg/m

0.64
kg

 

 

 

 

 

 

 

Lead angle accuracy

 

 

Unit : um

 

Effective length of screw

Lead accuracy (um)

 

(mm)

C3

C5

C7

 

Over

Less

±Ec e

±Ec e

±Ec

 

100

8 8

18 18

±50/300mm

 

100

200

10 8

20 18

 

200

315

12 8

23 18

 

315

400

13 10

25 20

 

Representative travel distance error (Use "±Ec" Stand for)

 

Fluctuation(Use "e" Stand for)