DOUBLE REDUCTION SERIES
Capacité jusqu’à 10 000 lb
Lorsque vous devez soulever, abaisser ou positionner une lourde charge, les treuils de la main de Thern sont conçus pour offrir une excellente performance et une longue durée de vie, quelle que soit votre application.
FAITS SAILLANTS
- Engrenages coupés à la machine
- Variété de configurations
- Poignées réglables
- Résistant à la corrosion
- Garantie limitée de deux ans
MODÈLES DE SERIE
- M452/M452B
- M452B-A
- M492/M492B
- M492-12/M492B-12
BESOIN D’UN DEVIS?
Si vous n’êtes pas sûr de quel produit vous avez besoin et souhaitez un devis, s’il vous plaît remplir un formulaire de demande.

Spur Gear Double Reduction Hand Winches Performance Characteristics — Metric |
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Load Rating |
Drum Capacity1 |
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Model No. |
Description |
1st Layer |
Mid Drum |
Full Drum |
Wire Rope Dia. |
1st Layer |
Mid Drum |
Full Drum |
Sgl Gear Ratio |
Dbl Gear Ratio |
Force2 to Lift 1000 lb |
Approx. Ship Wt. |
(kg) |
(kg) |
(kg) |
(mm) |
(m) |
(m) |
(m) |
(kg) |
(kg) |
||||
M452 |
4000 lb — marine duty |
1814 |
1496 |
1133 |
6.3 |
7.0 |
39.6 |
91.4 |
4.42:1 |
19.54:1 |
4.5 |
38 |
(for pulling only) |
7.9 |
5.4 |
27.1 |
60.9 |
(dbl gear) |
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9.5 |
4.2 |
19.5 |
42.6 |
|||||||||
M452B |
4000 lb — marine duty |
1814 |
1496 |
1133 |
6.3 |
7.0 |
39.6 |
91.4 |
— |
19.54:1 |
4.5 |
42 |
with brake (for lifting only) |
7.9 |
5.4 |
27.1 |
60.9 |
(dbl gear) |
|||||||
9.5 |
4.2 |
19.5 |
42.6 |
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M452B-A |
4000 lb — marine duty |
1814 |
1496 |
1133 |
6.3 |
3.9 |
25.2 |
57.9 |
— |
19.54:1 |
4.5 |
38 |
with brake (for lifting) |
7.9 |
2.7 |
17.0 |
36.5 |
(dbl gear) |
|||||||
4-inch drum width |
9.5 |
2.1 |
12.1 |
27.1 |
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M492 |
10,000 lb — marine duty |
4535 |
3356 |
2449 |
7.9 |
8.2 |
73.1 |
164.5 |
5.00:1 |
25.00:1 |
3.6 |
76 |
(for pulling only) |
9.5 |
6.4 |
51.8 |
118.8 |
(dbl gear) |
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12.7 |
4.5 |
30.4 |
70.1 |
|||||||||
M492B |
10,000 lb — marine duty |
4535 |
3356 |
2449 |
7.9 |
8.2 |
73.1 |
164.5 |
— |
25.00:1 |
3.6 |
79 |
with brake (for lifting) |
9.5 |
6.4 |
51.8 |
118.8 |
(dbl gear) |
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12.7 |
4.5 |
30.4 |
70.1 |
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M492-12 |
10,000 lb — marine duty |
4535 |
3356 |
2449 |
7.9 |
14.0 |
115.8 |
259.0 |
5.00:1 |
25.00:1 |
3.6 |
80 |
(for pulling only) |
9.5 |
11.2 |
82.2 |
185.9 |
(dbl gear) |
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12-inch drum width |
12.7 |
8.2 |
48.7 |
109.7 |
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M492B-12 |
10,000 lb — marine duty |
4535 |
3356 |
2449 |
7.9 |
14.0 |
115.8 |
259.0 |
— |
25.00:1 |
3.6 |
87 |
with brake (for lifting) |
9.5 |
11.2 |
82.2 |
185.9 |
(dbl gear) |
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12-inch drum width |
12.7 |
8.2 |
48.7 |
109.7 |
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MB451 |
Disc brake only for M452 (for lifting) |
6 |
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MB491 |
Disc brake only for M492 and M492-12 (for lifting) |
7 |
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Please contact factory or nearest Thern distributor for firm fixed price and delivery. 1 Actual drum capacities may be 25-30% less due to nonuniform winding. Wire rope tension will also affect drum capacity. 2 Approximate handle force required to lift 1000 lb with an empty drum and maximum handle length. |
IMPORTANT: It is the owner’s or operator’s responsibility to determine the suitability of the equipment to its intended use. Study all applicable codes, manuals and regulations. Be sure to read the Owner’s Manual supplied with the equipment before operating it.
Spur Gear Double Reduction Hand Winches Performance Characteristics |
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Load Rating |
Drum Capacity1 |
|||||||||||
Model No. |
Description |
1st Layer |
Mid Drum |
Full Drum |
Wire Rope Dia. |
1st Layer |
Mid Drum |
Full Drum |
Sgl Gear Ratio |
Dbl Gear Ratio |
Force2 to Lift 1000 lb |
Approx. Ship Wt. |
(lb) |
(lb) |
(lb) |
(in) |
(ft) |
(ft) |
(ft) |
(lb) |
(lb) |
||||
M452 |
4000 lb — marine duty |
4000 |
3300 |
2500 |
1/4 |
23 |
130 |
300 |
4.42:1 |
19.54:1 |
10 |
83 |
(for pulling only) |
5/16 |
18 |
89 |
200 |
(dbl gear) |
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3/8 |
14 |
64 |
140 |
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M452B |
4000 lb — marine duty |
4000 |
3300 |
2500 |
1/4 |
23 |
130 |
300 |
— |
19.54:1 |
10 |
91 |
with brake (for lifting only) |
5/16 |
18 |
89 |
200 |
(dbl gear) |
|||||||
3/8 |
14 |
64 |
140 |
|||||||||
M452B-A |
4000 lb — marine duty |
4000 |
3300 |
2500 |
1/4 |
13 |
83 |
190 |
— |
19.54:1 |
10 |
83 |
with brake (for lifting) |
5/16 |
9 |
56 |
120 |
(dbl gear) |
|||||||
4-inch drum width |
3/8 |
7 |
40 |
89 |
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M492 |
10,000 lb — marine duty |
10,000 |
7400 |
5400 |
5/16 |
27 |
240 |
540 |
5.00:1 |
25.00:1 |
8 |
166 |
(for pulling only) |
3/8 |
21 |
170 |
390 |
(dbl gear) |
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1/2 |
15 |
100 |
230 |
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M492B |
10,000 lb — marine duty |
10,000 |
7400 |
5400 |
5/16 |
27 |
240 |
540 |
— |
25.00:1 |
8 |
173 |
with brake (for lifting) |
3/8 |
21 |
170 |
390 |
(dbl gear) |
|||||||
1/2 |
15 |
100 |
230 |
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M492-12 |
10,000 lb — marine duty |
10,000 |
7400 |
5400 |
5/16 |
46 |
380 |
850 |
5.00:1 |
25.00:1 |
8 |
175 |
(for pulling only) |
3/8 |
37 |
270 |
610 |
(dbl gear) |
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12-inch drum width |
1/2 |
27 |
160 |
360 |
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M492B-12 |
10,000 lb — marine duty |
10,000 |
7400 |
5400 |
5/16 |
46 |
380 |
850 |
— |
25.00:1 |
8 |
190 |
with brake (for lifting) |
3/8 |
37 |
270 |
610 |
(dbl gear) |
|||||||
12-inch drum width |
1/2 |
27 |
160 |
360 |
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MB451 |
Disc brake only for M452 (for lifting) |
13 |
||||||||||
MB491 |
Disc brake only for M492 and M492-12 (for lifting) |
15 |
||||||||||
Please contact factory or nearest Thern distributor for firm fixed price and delivery. 1 Actual drum capacities may be 25-30% less due to nonuniform winding. Wire rope tension will also affect drum capacity. 2 Approximate handle force required to lift 1000 lb with an empty drum and maximum handle length. |
IMPORTANT: It is the owner’s or operator’s responsibility to determine the suitability of the equipment to its intended use. Study all applicable codes, manuals and regulations. Be sure to read the Owner’s Manual supplied with the equipment before operating it.


Spur Gear Double Reduction Hand Winches — Imperial Dimensions |
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Model No. |
Drum Dia. |
Flange Dia. |
Drum Width |
A |
B |
C |
D |
E |
F |
G1 |
H1 |
J |
K |
L |
M |
S (hole dia.) |
T |
V |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
|
M452 |
4.00 |
8.50 |
6.38 |
15.25 |
22.00 |
10.69 |
5.81 |
5.81 |
14.81 |
18.62 |
24.44 |
6.75 |
9.50 |
11.25 |
12.50 |
.56 |
.25 |
— |
M452B |
4.00 |
8.50 |
6.38 |
15.25 |
21.90 |
10.69 |
5.81 |
5.81 |
16.43 |
18.38 |
24.19 |
6.75 |
9.50 |
11.25 |
12.50 |
.56 |
.25 |
— |
M452B-A |
4.00 |
8.50 |
4.00 |
15.25 |
19.62 |
10.83 |
5.81 |
5.81 |
14.06 |
18.38 |
24.19 |
4.50 |
7.12 |
11.25 |
12.50 |
.56 |
.25 |
— |
M492 |
5.00 |
12.38 |
7.62 |
20.38 |
25.12 |
14.00 |
7.50 |
7.50 |
18.44 |
22.50 |
30.00 |
8.00 |
12.00 |
15.50 |
17.00 |
.81 |
.38 |
— |
M492B |
5.00 |
12.38 |
7.62 |
20.38 |
25.00 |
14.00 |
7.50 |
7.50 |
19.53 |
18.50 |
26.00 |
8.00 |
12.00 |
15.50 |
17.00 |
.81 |
.38 |
— |
M492-12 |
5.00 |
12.38 |
12.00 |
20.38 |
29.50 |
14.00 |
7.50 |
7.50 |
22.82 |
22.50 |
30.00 |
8.00 |
16.38 |
15.50 |
17.00 |
.81 |
.38 |
12.38 |
M492B-12 |
5.00 |
12.38 |
12.00 |
20.38 |
29.38 |
14.00 |
7.50 |
7.50 |
23.90 |
18.50 |
26.00 |
8.00 |
16.38 |
15.50 |
17.00 |
.81 |
.38 |
12.38 |
Dimensions are for reference only and subject to change without notice. 1 Handles are adjustable. Dimension shown is for maximum handle length. |
Spur Gear Double Reduction Hand Winches — Metric Dimensions |
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Model No. |
Drum Dia. |
Flange Dia. |
Drum Width |
A |
B |
C |
D |
E |
F |
G1 |
H1 |
J |
K |
L |
M |
S (hole dia.) |
T |
V |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
|
M452 |
101.6 |
215.9 |
162.0 |
387.3 |
558.8 |
271.5 |
147.5 |
147.5 |
376.1 |
472.9 |
620.7 |
171.4 |
241.3 |
285.7 |
317.5 |
14.2 |
6.3 |
— |
M452B |
101.6 |
215.9 |
162.0 |
387.3 |
556.2 |
271.5 |
147.5 |
147.5 |
417.3 |
466.8 |
614.4 |
171.4 |
241.3 |
285.7 |
317.5 |
14.2 |
6.3 |
— |
M452B-A |
101.6 |
215.9 |
101.6 |
387.3 |
498.3 |
275.0 |
147.5 |
147.5 |
357.1 |
466.8 |
614.4 |
114.3 |
180.8 |
285.7 |
317.5 |
14.2 |
6.3 |
— |
M492 |
127 |
314.4 |
193.5 |
517.6 |
638.0 |
355.6 |
190.5 |
190.5 |
468.3 |
571.5 |
762 |
203.2 |
304.8 |
393.7 |
431.8 |
20.5 |
9.6 |
— |
M492B |
127 |
314.4 |
193.5 |
517.6 |
635 |
355.6 |
190.5 |
190.5 |
496.0 |
469.9 |
660.4 |
203.2 |
304.8 |
393.7 |
431.8 |
20.5 |
9.6 |
— |
M492-12 |
127 |
314.4 |
304.8 |
517.6 |
749.3 |
355.6 |
190.5 |
190.5 |
579.6 |
571.5 |
762 |
203.2 |
416.0 |
393.7 |
431.8 |
20.5 |
9.6 |
314.4 |
M492B-12 |
127 |
314.4 |
304.8 |
517.6 |
746.2 |
355.6 |
190.5 |
190.5 |
607.0 |
469.9 |
660.4 |
203.2 |
416.0 |
393.7 |
431.8 |
20.5 |
9.6 |
314.4 |
Dimensions are for reference only and subject to change without notice. 1 Handles are adjustable. Dimension shown is for maximum handle length. |
IMPORTANT: It is the owner’s or operator’s responsibility to determine the suitability of the equipment to its intended use. Study all applicable codes, manuals and regulations. Be sure to read the Owner’s Manual supplied with the equipment before operating it.
Disc Brake Dimensions — Models MB451/MB491 |
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Model No. |
N |
P |
Q1 |
R |
U |
V |
||||||
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
|
MB451 |
4.97 |
126.2 |
10.44 |
265.1 |
21.25 |
539.7 |
4.87 |
123.6 |
2.44 |
61.9 |
8.62 |
218.9 |
MB491 |
5.15 |
130.8 |
10.62 |
269.7 |
21.38 |
543.0 |
4.87 |
123.6 |
2.44 |
61.9 |
10.56 |
268.2 |
Dimensions are for reference only and subject to change without notice. 1 Handles are adjustable. Dimension shown is for maximum handle length. |
IMPORTANT: It is the owner’s or operator’s responsibility to determine the suitability of the equipment to its intended use. Study all applicable codes, manuals and regulations. Be sure to read the Owner’s Manual supplied with the equipment before operating it.