43
BORE SPECIFICATIONS
Hub
Chuck
Hub
Chuck
2. Centering Adjustment
Before machining shaft bores, perform the centering adjustment as
shown below:
Hub
3. Shaft Bore Machining
For the machining of shaft bores in the hub and the pressure flange,
refer to the recommended machining dimensions specified on p. 44.
When machining bores for Power-Lock type couplings, conform to
the machining dimensions as shown below.
Rough Bore Dimension
Unit:
mm
Shaft Dia.
d
Nominal
Key Size
Shaft
×
Height
b
×
(h)
Keyway
Depth
Shaft
t
1
Hub
t
2
Above
8
, up to
10
3
×
3
1.8 1.4
Above
10
, up to
12
4
×
4
2.5 1.8
Above
12
, up to
17
5
×
5
3.0 2.3
Above
17
, up to
22
6
×
6
3.5 2.8
Above
20
, up to
25
( 7
×
7)
4.0 3.0
Above
22
, up to
30
8
×
7
4.0 3.3
Above
30
, up to
38
10
×
8
5.0 3.3
Above
38
, up to
44
12
×
8
5.0 3.3
Above
44
, up to
50
14
×
9
5.5 3.8
Above
50
, up to
55
(15
×
10)
5.0 5.0
Above
50
, up to
58 16
×
10
6.0 4.3
Above
58
, up to
65 18
×
11
7.0 4.4
Above
65
, up to
75 20
×
12
7.5 4.9
Above
75
, up to
85
22
×
14
9.0 5.4
Above
80
, up to
90 (24
×
16)
8.0 8.0
Above
85
, up to
95 25
×
14
9.0 5.4
Above
95
, up to
110
28
×
16
10.0
6.4
Above
110
, up to
130
32
×
18
11.0
7.4
Above
125
, up to
140
(35
×
22) 11.0 11.0
Above
130
, up to
150
36
×
20
12.0
8.4
Above
140
, up to
160
(38
×
24) 12.0 12.0
Above
150
, up to
170
40
×
22
13.0
9.4
Above
160
, up to
180
(42
×
26) 13.0 13.0
Above
170
, up to
200
45
×
25
15.0 10.4
Above
200
, up to
230
50
×
28
17.0 11.4
Shaft Dia.
Bore Dia.
Size
Tolerance
Transition
Fit
Interference
Fit
12
j
6
H7
M7
14
16
18
19
20
22
24
25
28
30
32
k6
35
38
40
42
N7
45
48
50
55
m6
56
60
63
Shaft Dia.
Bore Dia.
Size
Tolerance
Transition
Fit
Interference
Fit
65
m6
H7
N7
70
71
75
80
85
90
95
100
110
120
125
130
140
150
160
P7
170
180
190
200
210
220
Keyway Dimension Table
New JIS (JIS B1301-1996)
Shaft Bore Machining / Keyway Dimensions
1. Tolerance for Shaft and Bore
t
2
Shaft Diameter and Recommended Shaft Bore Tolerance
Old JIS (JIS B1301-1959)
For normal use, transition fit is
recommended. For high-speed
rotation that requires caution in
regards to the dynamic balance, an
interference fit is recommended.
Keyway
For the extended-diameter hub,
the keyway should be machined
at the following position.
Shaft Dia.
d
Nominal
Key Size
Shaft
×
Height
b
×
(t
2
＋
t
1
)
Keyway
Depth
Shaft
t
1
Hub
t
2
10
or more, up to
13
4
×
4
2.5 1.5
Above
13
, up to
20
5
×
5
3.0 2.0
Above
20
, up to
30
7
×
7
4.0 3.0
Above
30
, up to
40
10
×
8
4.5 3.5
Above
40
, up to
50
12
×
8
4.5 3.5
Above
50
, up to
60
15
×
10
5 5
Above
60
, up to
70
18
×
12
6 6
Above
70
, up to
80
20
×
13
7 6
Above
80
, up to
95
24
×
16
8 8
Above
95
, up to
110
28
×
18
9 9
Above
110
, up to
125 32
×
20
10
10
Above
125
, up to
140 35
×
22
11
11
Above
140
, up to
160 38
×
24
12
12
Above
160
, up to
180 42
×
26
13
13
Above
180
, up to
200 45
×
28
14
14
Above
200
, up to
224 50
×
31.5 16
15.5
With the square hub for the NEF10, 18, 25, perform the centering
adjustment on the flange periphery. The reading on the dial gauge may
fluctuate markedly on the drilled bore in the hub. This is because the
flange is displaced toward the periphery during machining of the
drilled bore. When reading the dial gauge, disregard the values at such
locations.
Standard Hub
Square Hub
Chuck
Pressure
Flange
Model No.
Hub (Rough Bore)
d
Pressure Flange
di
do
8
−
−
NEF
04
8
10.1
14.9
NEF 10
10
13
39.8
NEF 18
12
13
39.8
NEF 25
15
18.2
44.8
NEF 45
15
−
−
NEF 80
15
−
−
NEF130
25
−
−
NEF210
25
−
−
NEF340
45
−
−
NEF540
50
−
−
NEF700
50
−
−
NEH 09 W
50
−
−
NEH 14 W
55
−
−
NEH 20 W
65
−
−
NEH 30 W
75
−
−
NEH 41 W
80
−
−
NEF 02
Summary of Contents for ECHT-FLEX NEF130W
Page 1: ...EMER FLEX COUPLING...
Page 9: ...8 EMER FLEX Example of Mounting Example of Mounting...
Page 36: ...35 35 NEW PRODUCTS...
