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NB CENTER-LINED TAPPED SHAFT
G-9
A larger diameter shaft can overcome problems in maintaining precision functionality when a high or unbalanced
load is applied. The application of the center-lined tapped shaft together with the SA type support base is ideal in
such cases (see SA dimensional table on pages E-32 and E-33). The center-lined tapped shaft is standardized
to simplify selection.
part number structure
example SNSB 25 576
material
SNB SUJ2
equivalent to
SNSB
SUS440C
length (L)
outer diameter (D)
material: high-carbon chromium bearing steel (SUJ2)
hardness: HV697 (60HRC) or more
*g6 is standard tolerance for the outer diameter.
N:
K: number of pitches
L-KP
2
NB Center-Lined Tapped Shaft NB Center-Lined Stainless Tapped Shaft
part
outer diameter
D tolerance
pitch bolt
size
tap
depth
maximum
length
part
outer diameter
D tolerance
pitch bolt
size
tap
depth
maximum
length
number
g6* P M Lmax number
g6* P M Lmax
mm m mm
mm mm
mm m mm
mm mm
SNB10 10 5/14 100 M 4 4.5 1,500 SNSB16 16 6/17 150 M 5 7 2,000
SNB12
SNB13
SNB16
12
13
16
6
17
100
100
150
M 4
M 4
M 5
5.5
6
7
1,800
2,000
2,000
SNSB20
SNSB25
SNSB30
20
25
30
7
20
150
200
200
M 6
M 6
M 8
9
12
15
3,000
4,000
4,500
SNB20
SNB25
SNB30
20
25
30
7
20
150
200
200
M 6
M 6
M 8
9
12
15
3,000
4,000
4,500
SNSB35
SNSB40
SNSB50
35
40
50
9
25
200
300
300
M 8
M 8
M10
15
18
22
5,000
6,000
6,000
SNB35
SNB40
SNB50
35
40
50
9
25
200
300
300
M 8
M 8
M10
15
18
22
5,000
6,000
6,000
material: Martensite stainless steel (equivalent to SUS440C)
hardness: HV613 (56HRC) or more
*g6 is standard tolerance for the outer diameter.
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