SPUR GEAR SERIES
Up to 2000 lb Capacity
When you need to lift, lower or position a heavy load, Thern’s spur gear hand winches are designed to deliver excellent performance and long life, no matter what your application.
QUICK FACTS
- Up to 2000 lb (907 kg) capacity
- Machine-cut spur gears
- Variety of configurations
- Stainless steel models available
- Corrosion resistant
- Two-Year Limited Warranty
SERIES MODELS
- M401
- M4022/M4022PB
- M4032/M4032PB
- M4042PBSS
- M4312/M4312PB
- M4312PBSS
- M4412/M4412PB
NEED A QUOTE?
If you’re not sure what product you need and would like a quote, please fill out a request form.

Spur Gear Hand Winches Performance Characteristics — Metric |
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Load Rating |
Drum Capacity2 |
|||||||||||
Model No. |
Description |
1st Layer |
Mid Drum |
Full Drum |
Wire Rope Dia.1 |
1st Layer |
Mid Drum |
Full Drum |
Sgl Gear Ratio |
Dbl Gear Ratio |
Force3 to Lift 453.5 kg |
Approx. Ship Wt. |
(kg) |
(kg) |
(kg) |
(mm) |
(m) |
(m) |
(m) |
(kg) |
(kg) |
||||
M401 |
226.7 kg — marine duty |
226.7 |
181.4 |
136.0 |
3.1 |
2.1 |
18.2 |
39.6 |
— |
— |
— |
3.6 |
(for pulling only) |
4.7 |
1.2 |
8.2 |
18.2 |
||||||||
M4022 |
453.5 kg — marine duty |
453.5 |
317.5 |
226.7 |
3.1 |
1.2 |
15.8 |
39.6 |
2.85:1 |
— |
18.1 |
5.4 |
(for pulling only) |
4.7 |
0.9 |
7.9 |
17.3 |
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M4022PB |
453.5 kg — marine duty |
453.5 |
317.5 |
226.7 |
3.1 |
1.2 |
15.8 |
39.6 |
2.85:1 |
— |
18.5 |
7.7 |
(for pulling only) |
4.7 |
0.9 |
7.9 |
17.3 |
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M4032 |
453.5 kg — marine duty |
453.5 |
317.5 |
226.7 |
3.1 |
3.3 |
33.5 |
76.2 |
2.85:1 |
— |
18.1 |
6.3 |
(for pulling only) |
4.7 |
2.1 |
15.5 |
33.5 |
||||||||
M4032PB |
453.5 kg — marine duty |
453.5 |
317.5 |
226.7 |
3.1 |
3.3 |
33.5 |
76.2 |
2.85:1 |
— |
18.5 |
8.1 |
(for pulling only) |
4.7 |
2.1 |
15.5 |
33.5 |
||||||||
M4042PBSS |
453.5 kg — stainless steel |
453.5 |
362.8 |
272.1 |
3.1 |
3.6 |
33.5 |
73.1 |
3.83:1 |
— |
20.8 |
10.8 |
with brake (for lifting) |
4.7 |
2.4 |
14.6 |
33.5 |
(sgl gear) |
|||||||
6.3 |
1.5 |
8.2 |
17.9 |
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M4312 |
907.1 kg — marine duty |
907.1 |
725.7 |
544.3 |
4.7 |
2.4 |
14.6 |
33.5 |
3.83:1 |
14.7:1 |
9.0 |
10.4 |
(for pulling only) |
6.3 |
1.5 |
8.2 |
17.9 |
(dbl gear) |
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7.9 |
1.2 |
5.1 |
11.8 |
|||||||||
M4312PB |
907.1 kg — marine duty |
907.1 |
725.7 |
544.3 |
4.7 |
2.4 |
14.6 |
33.5 |
— |
14.7:1 |
7.7 |
12.7 |
with brake (for lifting) |
6.3 |
1.5 |
8.2 |
17.9 |
(dbl gear) |
|||||||
7.9 |
1.2 |
5.1 |
11.8 |
|||||||||
M4312PBSS |
907.1 kg — stainless steel |
907.1 |
725.7 |
544.3 |
4.7 |
2.4 |
14.6 |
33.5 |
— |
14.7:1 |
7.7 |
12.7 |
with brake (for lifting) |
6.3 |
1.5 |
8.2 |
17.9 |
(dbl gear) |
|||||||
7.9 |
1.2 |
5.1 |
11.8 |
|||||||||
M4412 |
907.1 kg — marine duty |
907.1 |
725.7 |
544.3 |
4.7 |
5.4 |
29.5 |
64.0 |
3.83:1 |
14.7:1 |
9.0 |
11.3 |
(for pulling only) |
6.3 |
4.2 |
15.8 |
36.5 |
(dbl gear) |
|||||||
7.9 |
3.3 |
10.6 |
23.4 |
|||||||||
M4412PB |
907.1 kg — marine duty |
907.1 |
725.7 |
544.3 |
4.7 |
5.4 |
29.5 |
64.0 |
— |
14.7:1 |
7.7 |
13.6 |
with brake (for lifting) |
6.3 |
4.2 |
15.8 |
36.5 |
(dbl gear) |
|||||||
7.9 |
3.3 |
10.6 |
23.4 |
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Please contact factory or nearest Thern distributor for firm fixed price and delivery. 1 For Models M4022, M4022PB, M4032, M4032PB ball end is available for 3.1 mm and 4.7 mm only. 1 For Models M4042PBSS, M4312, M4312PB, M4312PBSS, M4412, M4412PB ball end is available for 4.7 mm and 6.3 mm only. 2 Actual drum capacities may be 25-30% less, due to nonuniform winding. Wire rope tension will also affect drum capacity. 3 Approximate handle force required to lift 453.5 kg 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 Hand Winches Performance Characteristics |
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Load Rating |
Drum Capacity2 |
|||||||||||
Model No. |
Description |
1st Layer |
Mid Drum |
Full Drum |
Wire Rope Dia.1 |
1st Layer |
Mid Drum |
Full Drum |
Sgl Gear Ratio |
Dbl Gear Ratio |
Force3 to Lift 1000 lb |
Approx. Ship Wt. |
(lb) |
(lb) |
(lb) |
(in) |
(ft) |
(ft) |
(ft) |
(lb) |
(lb) |
||||
M401 |
500 lb — marine duty |
500 |
400 |
300 |
1/8 |
7 |
60 |
130 |
— |
— |
— |
8 |
(for pulling only) |
3/16 |
4 |
27 |
60 |
||||||||
M4022 |
1000 lb — marine duty |
1000 |
700 |
500 |
1/8 |
4 |
52 |
130 |
2.85:1 |
— |
40 |
12 |
(for pulling only) |
3/16 |
3 |
26 |
57 |
||||||||
M4022PB |
1000 lb — marine duty |
1000 |
700 |
500 |
1/8 |
4 |
52 |
130 |
2.85:1 |
— |
41 |
17 |
with brake (for lifting) |
3/16 |
3 |
26 |
57 |
||||||||
M4032 |
1000 lb — marine duty |
1000 |
700 |
500 |
1/8 |
11 |
110 |
250 |
2.85:1 |
— |
40 |
14 |
(for pulling only) |
3/16 |
7 |
51 |
110 |
||||||||
M4032PB |
1000 lb — marine duty |
1000 |
700 |
500 |
1/8 |
11 |
110 |
250 |
2.85:1 |
— |
41 |
18 |
with brake (for lifting) |
3/16 |
7 |
51 |
110 |
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M4042PBSS |
1000 lb — stainless steel |
1000 |
800 |
600 |
1/8 |
12 |
110 |
240 |
3.83:1 |
— |
46 |
24 |
with brake (for lifting) |
3/16 |
8 |
48 |
110 |
(sgl gear) |
|||||||
1/4 |
5 |
27 |
59 |
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M4312 |
2000 lb — marine duty |
2000 |
1600 |
1200 |
3/16 |
8 |
48 |
110 |
3.83:1 |
14.7:1 |
20 |
23 |
(for pulling only) |
1/4 |
5 |
27 |
59 |
(dbl gear) |
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5/16 |
4 |
17 |
39 |
|||||||||
M4312PB |
2000 lb — marine duty |
2000 |
1600 |
1200 |
3/16 |
8 |
48 |
110 |
— |
14.7:1 |
17 |
28 |
with brake (for lifting) |
1/4 |
5 |
27 |
59 |
(dbl gear) |
|||||||
5/16 |
4 |
17 |
39 |
|||||||||
M4312PBSS |
2000 lb — stainless steel |
2000 |
1600 |
1200 |
3/16 |
8 |
48 |
110 |
— |
14.7:1 |
17 |
28 |
with brake (for lifting) |
1/4 |
5 |
27 |
59 |
(dbl gear) |
|||||||
5/16 |
4 |
17 |
39 |
|||||||||
M4412 |
2000 lb — marine duty |
2000 |
1600 |
1200 |
3/16 |
18 |
97 |
210 |
3.83:1 |
14.7:1 |
20 |
25 |
(for pulling only) |
1/4 |
14 |
52 |
120 |
(dbl gear) |
|||||||
5/16 |
11 |
35 |
77 |
|||||||||
M4412PB |
2000 lb — marine duty |
2000 |
1600 |
1200 |
3/16 |
18 |
97 |
210 |
— |
14.7:1 |
17 |
30 |
with brake (for lifting) |
1/4 |
14 |
52 |
120 |
(dbl gear) |
|||||||
5/16 |
11 |
35 |
77 |
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Please contact factory or nearest Thern distributor for firm fixed price and delivery. 1 For Models M4022, M4022PB, M4032, M4032PB ball end is available for 1/8 inch and 3/16 inch only. 1 For Models M4042PBSS, M4312, M4312PB, M4312PBSS, M4412, M4412PB ball end is available for 3/16 inch and 1/4 inch only. 2 Actual drum capacities may be 25-30% less, due to nonuniform winding. Wire rope tension will also affect drum capacity. 3 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 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 |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
|
M401 |
1.50 |
4.06 |
2.75 |
6.56 |
10.56 |
4.56 |
2.50 |
2.50 |
5.81 |
8.50 |
11.28 |
2.19 |
4.38 |
2.50 |
3.50 |
.40 |
.18 |
M4022 |
1.50 |
4.56 |
2.00 |
7.34 |
8.97 |
6.12 |
3.27 |
1.88 |
5.25 |
10.53 |
13.56 |
1.84 |
3.68 |
2.82 |
5.00 |
.43 |
.18 |
M4022PB |
1.50 |
4.56 |
2.00 |
7.34 |
12.22 |
6.12 |
3.27 |
2.00 |
8.22 |
10.53 |
13.12 |
1.84 |
3.68 |
2.82 |
5.00 |
.43 |
.18 |
M4032 |
1.50 |
4.56 |
4.00 |
7.36 |
11.00 |
6.12 |
3.27 |
1.88 |
7.19 |
10.53 |
13.56 |
3.00 |
5.68 |
2.00 |
5.00 |
.43 |
.18 |
M4032PB |
1.50 |
4.56 |
4.00 |
7.36 |
14.22 |
6.12 |
3.27 |
2.00 |
10.19 |
10.53 |
13.12 |
3.00 |
5.68 |
2.00 |
5.00 |
.43 |
.18 |
M4042PBSS |
2.50 |
5.50 |
3.00 |
8.30 |
13.9 |
6.90 |
3.80 |
2.30 |
9.90 |
10.50 |
13.40 |
1.40 |
5.30 |
5.00 |
6.00 |
.40 |
.18 |
Dimensions are for reference only and subject to change without notice. 1 Models M401, M4022PB, M4032PB and M4042PBSS handles are adjustable. Dimension shown is for maximum handle length. |
Spur Gear 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 |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
|
M401 |
38.10 |
103.12 |
69.85 |
166.62 |
268.22 |
115.82 |
63.50 |
63.50 |
147.57 |
215.90 |
268.51 |
55.63 |
111.25 |
63.50 |
88.90 |
10.16 |
4.57 |
M4022 |
38.10 |
115.82 |
50.80 |
187.00 |
228.00 |
156.00 |
83.00 |
48.00 |
134.00 |
268.00 |
344.00 |
47.00 |
94.00 |
72.00 |
127.00 |
11.00 |
5.00 |
M4022PB |
38.10 |
115.82 |
50.80 |
187.00 |
310.00 |
156.00 |
83.00 |
48.00 |
209.00 |
268.00 |
333.00 |
47.00 |
94.00 |
72.00 |
127.00 |
11.00 |
4.50 |
M4032 |
38.10 |
115.82 |
101.60 |
187.00 |
277.80 |
156.00 |
83.00 |
48.00 |
183.00 |
268.00 |
344.00 |
76.00 |
145.00 |
51.00 |
127.00 |
11.00 |
5.00 |
M4032PB |
38.10 |
115.82 |
101.60 |
187.00 |
361.00 |
156.00 |
83.00 |
48.00 |
259.00 |
268.00 |
333.00 |
76.00 |
145.00 |
51.00 |
127.00 |
11.00 |
5.00 |
M4042PBSS |
63.50 |
139.70 |
76.20 |
211.00 |
354.00 |
176.00 |
96.00 |
58.00 |
249.00 |
267.00 |
343.00 |
37.00 |
134.00 |
127.00 |
152.00 |
10.00 |
5.00 |
Dimensions are for reference only and subject to change without notice. 1 Models M401, M4022PB, M4032PB and M4042PBSS 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.

Spur Gear Hand Winches — Imperial Dimensions |
|||||||||||||||||
Model No. |
Drum Dia. |
Flange Dia. |
Drum Width |
A |
B |
C |
D |
E |
F |
G1 |
H1 |
J |
K |
L |
M |
S (hole dia.) |
T |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
(in) |
|
M4312 |
2.50 |
5.50 |
3.00 |
10.20 |
13.00 |
7.20 |
4.00 |
4.00 |
8.30 |
8.80 |
13.30 |
3.30 |
5.30 |
5.00 |
6.00 |
.40 |
.20 |
M4312PB |
2.50 |
5.50 |
3.00 |
10.70 |
14.40 |
7.20 |
4.00 |
4.00 |
10.80 |
10.50 |
15.10 |
3.30 |
5.30 |
5.00 |
6.00 |
.40 |
.20 |
M4312PBSS |
2.50 |
5.50 |
3.00 |
10.20 |
14.20 |
7.20 |
4.00 |
4.00 |
10.70 |
10.50 |
15.20 |
3.30 |
5.30 |
5.00 |
6.00 |
.40 |
.20 |
M4412 |
2.50 |
5.50 |
6.00 |
13.70 |
16.00 |
7.20 |
4.00 |
4.00 |
10.80 |
8.80 |
13.30 |
6.30 |
8.30 |
5.00 |
6.00 |
.40 |
.20 |
M4412PB |
2.50 |
5.50 |
6.00 |
13.70 |
17.40 |
7.20 |
4.00 |
4.00 |
13.80 |
10.50 |
15.10 |
6.30 |
8.30 |
5.00 |
6.00 |
.40 |
.20 |
Dimensions are for reference only and subject to change without notice. 1 Models M4312PB, M4312PBSS and M4412PB handles are adjustable. Dimension shown is for maximum handle length. |
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Spur Gear Hand Winches — Metric Dimensions |
|||||||||||||||||
Model No. |
Drum Dia. |
Flange Dia. |
Drum Width |
A |
B |
C |
D |
E |
F |
G1 |
H1 |
J |
K |
L |
M |
S (hole dia.) |
T |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
(mm) |
|
M4312 |
63.50 |
139.70 |
76.20 |
272.00 |
330.00 |
183.00 |
101.00 |
101.00 |
210.00 |
222.00 |
339.00 |
85.00 |
134.00 |
127.00 |
153.00 |
10.00 |
5.00 |
M4312PB |
63.50 |
139.70 |
76.20 |
272.00 |
367.00 |
183.00 |
101.00 |
101.00 |
275.00 |
268.00 |
387.00 |
85.00 |
134.00 |
127.00 |
152.00 |
10.00 |
5.00 |
M4312PBSS |
63.50 |
139.70 |
76.20 |
259.00 |
260.00 |
183.00 |
101.00 |
101.00 |
273.00 |
267.00 |
386.00 |
85.00 |
134.00 |
127.00 |
152.00 |
10.00 |
5.00 |
M4412 |
63.50 |
139.70 |
152.40 |
348.00 |
406.00 |
183.00 |
101.00 |
101.00 |
286.00 |
222.00 |
339.00 |
161.00 |
210.00 |
127.00 |
152.00 |
10.00 |
5.00 |
M4412PB |
63.50 |
139.70 |
152.40 |
348.00 |
443.00 |
183.00 |
101.00 |
101.00 |
351.00 |
268.00 |
387.00 |
161.00 |
210.00 |
127.00 |
153.00 |
10.00 |
5.00 |
Dimensions are for reference only and subject to change without notice. 1 Models M4312PB, M4312PBSS and M4412PB 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.
Owner's Manual
Spur Gear (A8097-I-0321)M401 (A5360H-0516)