SERIES 3WG4
ATLAS II
PORTABLE
POWER WINCH
Up to 4,600 lb Capacity
When you need more power but can’t lose portability, the 3WG4 is your go-to winch. With double the load capacity of the 4WP2, you get the power you need with all the convenience of a smaller winch.
QUICK FACTS
- Machine cut gears
- Enclosed oil bath
- Cast aluminum
- Internal mechanical
- or motor brake
- Ball bearings
- Lifting handles
- Dual function cable anchor
- Mounting options
- 2-Year Limited Warranty
SERIES MODELS
- 3WG4
NEED A QUOTE?
If you’re not sure what product you need and would like a quote, please fill out a request form.

Model 3WG4 Atlas II Portable Power Winch
3WG4 Series Performance Characteristics |
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Load Rating |
Line Speed |
|||||||||||||||
Model No. |
Brake Style |
Duty Rating 1 |
Motor Codes |
Motor HP |
1st Layer |
Mid Drum |
Full Drum |
1st Layer |
Full Drum |
Approx. Ship Wt. 2 |
||||||
(mins) |
(lb) |
(kg) |
(lb) |
(kg) |
(lb) |
(kg) |
(fpm) |
(mpm) |
(fpm) |
(mpm) |
(lb) |
(kg) |
||||
3WG4-B3500-9S6 |
Internal |
15 |
B,C,D,E |
1.5 |
3500 |
1587.6 |
2500 |
1134.0 |
1900 |
861.8 |
9 |
2.7 |
16 |
4.9 |
186 |
84.4 |
3WG4-B3500-13S6 |
Internal |
15 |
B,C,D,E |
2 |
3500 |
1587.6 |
2500 |
1134.0 |
1900 |
861.8 |
13 |
4.0 |
24 |
7.3 |
191 |
86.6 |
3WG4-B4000-9S6 |
Internal |
15 |
A |
1.5 |
4000 |
1814.4 |
2800 |
1270.1 |
2200 |
997.9 |
9 |
2.7 |
16 |
4.9 |
181 |
82.1 |
3WG4-B4600-9S6 |
Internal |
15 |
B,C,D,E |
2 |
4600 |
2086.5 |
3300 |
1496.9 |
2500 |
1134.0 |
9 |
2.7 |
16 |
4.9 |
191 |
86.6 |
3WG4-B4600-13S6 |
Internal |
15 |
C,D,E |
3 |
4600 |
2086.5 |
3300 |
1496.9 |
2500 |
1134.0 |
13 |
4.0 |
24 |
7.3 |
190 |
86.2 |
3WG4-M3500-9S6 |
Motor |
60 |
D,E |
1.5 |
3500 |
1587.6 |
2500 |
1134.0 |
1900 |
861.8 |
9 |
2.7 |
16 |
4.9 |
171 |
77.6 |
3WG4-M3500-13S6 |
Motor |
60 |
B,D,E |
2 |
3500 |
1587.6 |
2500 |
1134.0 |
1900 |
861.8 |
13 |
4.0 |
24 |
7.3 |
182 |
82.6 |
3WG4-M4000-9S6 |
Motor |
60 |
A |
1.5 |
4000 |
1814.4 |
2800 |
1270.1 |
2200 |
997.9 |
9 |
2.7 |
16 |
4.9 |
181 |
82.1 |
3WG4-M4600-9S6 |
Motor |
60 |
B,D,E |
2 |
4600 |
2086.5 |
3300 |
1496.9 |
2500 |
1134.0 |
9 |
2.7 |
16 |
4.9 |
182 |
82.6 |
3WG4-M4600-13S6 |
Motor |
60 |
D,E |
3 |
4600 |
2086.5 |
3300 |
1496.9 |
2500 |
1134.0 |
13 |
4.0 |
24 |
7.3 |
181 |
82.1 |
Please contact factory or nearest Thern Distributor for firm fixed price and delivery. 1 Duty rating represents maximum operating time at full load. Rating includes lifting and lowering. Allow components to cool between cycles. 2 Weight may vary with motor selection. |
3WG4 Series Drum Capacities 4 |
||||||||||
Drum Layer |
||||||||||
Model No. |
Wire Rope Dia. |
Breaking Strength |
1st Layer |
Mid Drum |
Full Drum |
|||||
(in) |
(mm) |
(lb) |
(kg) |
(ft) |
(m) |
(ft) |
(m) |
(ft) |
(m) |
|
3WG4-B/M |
5/16 |
1.9 |
9800 5 |
4445.2 |
18 |
5.4 |
91 |
27.7 |
200 |
60.9 |
3WG4-B/M |
3/8 |
9.5 |
15,100 6 |
6849.0 |
14 |
4.2 |
65 |
19.8 |
140 |
42.6 |
4 Actual drum capacities may be 25-30% less, due to nonuniform winding. Tension in wire rope will also affect drum capacity. 5 Values based on 7×19 Galvanized Aircraft cable. 6 Values based on 6×37 EIPS wire rope. |
Motor Codes |
||
A |
115 volt |
1 phase |
B |
230 volt |
1 phase |
C |
208 volt |
3 phase |
D |
230 volt |
3 phase |
E |
460 volt |
3 phase |
F |
All other voltages please contact the factory. |

3WG4 Series – Winch Dimensions |
||||||||||||||||||
Model |
A1 |
B1 |
C |
D |
E |
F |
G |
H1 |
J |
|||||||||
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
|
3WG4-B3500-9S6 |
22.50 |
571.5 |
24.50 |
622.3 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
9.50 |
241.3 |
18.50 |
469.9 |
1.00 |
25.4 |
3WG4-B3500-13S6 |
23.50 |
596.9 |
24.50 |
622.3 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
9.50 |
241.3 |
18.50 |
469.9 |
1.00 |
25.4 |
3WG4-B4000-9S6 |
23.00 |
584.2 |
24.50 |
622.3 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
9.50 |
241.3 |
18.00 |
457.2 |
1.00 |
25.4 |
3WG4-B4600-9S6 |
23.50 |
596.9 |
24.50 |
622.3 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
9.50 |
241.3 |
18.50 |
469.9 |
1.00 |
25.4 |
3WG4-B4600-13S6 |
22.00 |
558.8 |
23.50 |
596.9 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
9.50 |
241.3 |
18.50 |
469.9 |
1.00 |
25.4 |
3WG4-M3500-9S6 |
26.50 |
673.1 |
19.50 |
495.3 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
5.75 |
146.0 |
18.00 |
457.2 |
1.00 |
25.4 |
3WG4-M3500-13S6 |
28.00 |
711.2 |
21.00 |
533.4 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
5.75 |
146.0 |
18.50 |
469.9 |
1.00 |
25.4 |
3WG4-M4000-9S6 |
28.00 |
711.2 |
20.50 |
520.7 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
5.75 |
146.0 |
18.00 |
457.2 |
1.00 |
25.4 |
3WG4-M4600-9S6 |
28.00 |
711.2 |
21.00 |
533.4 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
5.75 |
146.0 |
18.50 |
469.9 |
1.00 |
25.4 |
3WG4-M4600-13S6 |
27.50 |
698.5 |
19.50 |
495.3 |
3.63 |
92.2 |
5.63 |
143.0 |
1.88 |
47.7 |
17.75 |
450.8 |
5.75 |
146.0 |
18.50 |
469.9 |
1.00 |
25.4 |
Model |
K |
M |
N |
P |
R |
S |
T |
Approx. Ship Wt. |
||||||||
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(lb) |
(kg) |
|
3WG4-B3500-9S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
240 |
108.9 |
3WG4-B3500-13S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
245 |
111.1 |
3WG4-B4000-9S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
235 |
106.6 |
3WG4-B4600-9S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
245 |
111.1 |
3WG4-B4600-13S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
245 |
111.1 |
3WG4-M3500-9S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
225 |
102.1 |
3WG4-M3500-13S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
235 |
106.6 |
3WG4-M4000-9S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
235 |
106.6 |
3WG4-M4600-9S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
235 |
106.6 |
3WG4-M4600-13S6 |
7.00 |
177.8 |
9.00 |
228.6 |
1.25 |
31.7 |
6.00 |
152.4 |
10.50 |
266.7 |
9/16 |
14.2 |
0.50 |
12.7 |
235 |
106.6 |
1 Dimensions A, B and H may vary with motor selection. Dimensions are for reference only and subject to change without notice. |
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.

3WG4 Series — Drum Dimensions |
||||||||
Model |
Drum Dia. |
Flange Dia. |
Drum Width |
Flange Angle Distance 1 |
||||
(in) |
(mm) |
(in) |
(mm) |
(in) |
(mm) |
(ft) |
(m) |
|
3WG4-M |
4.00 |
102 |
8.50 |
216 |
6.50 |
166 |
10.5 |
3.2 |
1 Recommended minimum distance between drum and lead sheave for smooth drum. Dimensions are for reference only and subject to change without notice. |
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.