39
Worm and Multi-Spur Reduction Gear Units
1 or 3 Phase Induction Motors Constant Speed
Enclosures: Standard Ventilated Internal Fan Cooled (IP 20)
Alternative Totally Enclosed (IP 50) with Terminal Box or T.E.F.C. (IP 54)
Gearbox Type:
MWS
Speed Range: 0.65 106 r.p.m.
FINAL
R.P.M.
OUTPUT TORQUE (Nm)
WORM
RATIO
SPUR
SD 41 MWS
SD 8 MWS
Voltage, Construction,
Connections, Motor
Performance and
Optional Extras
see pages 6 and 8 for
full details.
Minimum speed of 0.65 r.p.m.
Obtainable using 900 r.p.m. SD8/38
(1 Nm = 8.85 lbs. ins.) 1 Nm = 10.2 cmkp
Gearbox
Specification
Motor Speed
1400 r.p.m.
Motor Rating
10 watts
Motor Rating
35 watts
SD 41 MWS SD 8 MWS
SD 38 MWS
1
1.5
2.2
3.2
4.3
5.5
8
10
11
13
15
23
30
35
42
53
40:1
27:1
18 1/2:1
12 1/2:1
9 1/3:1
7 1/4:1
5 1/6:1
4 1/8:1
8 1/3:1
7 1/4:1
6 1/4:1
4 1/8:1
7 1/4:1
6 1/4:1
5 1/6:1
4 1/8:1
35.39:1
35.39:1
35.39:1
35.39:1
35.39:1
35.39:1
35.39:1
35.39:1
15.1:1
15.1:1
15.1:1
15.1:1
6.5:1
6.5:1
6.5:1
6.5:1
28.9
21.7
17.1
13.0
10.5
8.7
6.6
5.5
4.1
3.7
3.3
2.3
1.7
1.5
1.3
1.1
45
45
45
45
36.7
30.5
23.2
19.1
14.5
13.1
11.6
8.2
5.9
5.3
4.5
3.7
FINAL
R.P.M.
OUTPUT TORQUE (Nm)
WORM
RATIO
SPUR
Gearbox
Specification
Motor Speed
2800 r.p.m.
Motor Rating
25 watts
Motor Rating
60 watts
SD 41 MWS SD 8 MWS
SD 38 MWS
2
2.9
4.3
6.4
8.5
11
15
19
22
26
30
45
60
70
84
106
40:1
27:1
18 1/2:1
12 1/2:1
9 1/3:1
7 1/4:1
5 1/6:1
4 1/8:1
8 1/3:1
7 1/4:1
6 1/4:1
4 1/8:1
7 1/4:1
6 1/4:1
5 1/6:1
4 1/8:1
35.39:1
35.39:1
35.39:1
35.39:1
35.39:1
35.39:1
35.39:1
35.39:1
15.1:1
15.1:1
15.1:1
15.1:1
6.5:1
6.5:1
6.5:1
6.5:1
36.1
27.1
21.3
16.3
12.1
10.9
8.3
6.8
5.2
4.7
4.2
2.9
2.1
1.9
1.6
1.3
45
45
45
39.1
31.2
26.2
19.9
16.4
12.4
11.2
10.0
7.0
5.1
4.5
3.9
3.2
63
30
Ø 96
230
7
51
Ø 34
40
95.3
20.2
62.3
Ø 60
95
112
3.4
60
45
107
SD41 MWS Ø 81
SD8 MWS = 96
SD41 MWS = 221
7
51
Ø 34
40
95.3
20.2
62.3
Ø 60
95
112
3.4
60
45
107
SD8 MWS (T.E.F.C.) = 107
SD8 MWS = 230
SD8 MWS (T.E.F.C.) = 270
SD8 MWS = 80
SD 38 MWS
SD 8 MWS
SD 41 MWS
Dimensions in mm. Scale 1:4
Dimensions in mm. Scale 1:4
NB: Unit drawn is SD 8 MWS
Optional shaft at motor speed (terminal box end only) see separate motor drawing for details (Page 9).
SD8 MWS Optional shaft at motor speed (lead end only) see separate motor drawing for details (Page 9).
Not applicable to T.E.F.C. units.
SD41 MWS Optional shaft at motor speed (lead end only) 7.93mm dia.
33mm long.
Approx weight: SD 38 MWS 5.60 Kg
Approx. weight: SD 8 MWS 5.55 Kg
SD 41 MWS 4.85 Kg
Leads out
here 30cm
4 holes tapped
M8
15mm deep.
4 holes tapped
M8
15mm deep.
14mm dia. h6.
Keyway 5mm
38mm long.
Available both sides.
14 mm dia. h6.
Keyway 5mm
38mm long.
Available both sides.
Optional terminal box tapped
20mm conduit or PG 13.5 on
request. Shown standard position
R.H.S. entry down.
(Standard on T.E.F.C. units).
Tapped 20mm
conduit or PG13.5
on request.
Optional (either side): 4 holes
on 48mm P.C.D. Can be
tapped M5
11mm deep.
Optional (either side): 4 holes
on 48mm P.C.D. Can be
tapped M5
11mm deep.
Induction 1 & 3 Ph
Motor
C
L
Motor
C
L
Motor C
L
Motor C
L