Thern_M492
Thern_M452B

SPUR GEAR HAND WINCHES DOUBLE REDUCTION

M452 / M452B / M452B-A / M492 / M492B / M492-12 / M492B-12 / MB451 / MB491 / HW452 / HW492

Up to 10,000 lb. capacity

  • Machine Cut Spur Gears for accurate and long lasting service.
  • Automatic Brake Models provide positive load control for lifting and lowering operations. Brake models have B suffix.
  • Corrosion Resistant durable paint finish combined with zinc and iridescent dichromate plating protects against corrosion.
  • Bronze and Radial Ball Bearings provide smooth and efficient operation.
  • Large Diameter Drums minimize wear to extend wire rope life.
  • Spring Loaded Ratchets for positive engagement with gear.
  • Steel Gear Covers protect gears and help prevent injuries.
  • Handles Adjust in length to change force required to move load.
  • Two-year Limited Warranty 
Category:

Description

 

LOAD RATING (LB.)DRUM CAPACITY (FT.)1
MODEL NUMBERDESCRIPTION1ST LAYERMID DRUMFULL DRUMWIRE ROPE DIA. (IN)1ST LAYERMID DRUMFULL DRUMSINGLE GEAR RATIODOUBLE GEAR RATIOFORCE2 TO LIFT 1000 LB.APPROX SHIP WT. (LB)
M4524000 lb. – marine duty (for pulling only)4000330025001/4
5/16
3/8
23
18
14
130
89
64
300
200
140
4.42:119.54:110 lb.
(double gear)
83
M452B4000 lb. – marine duty with brake (for lifting)4000330025001/4
5/16
3/8
23
18
14
130
89
64
300
200
140
19.54:110 lb.
(double gear)
91
M452-B4000 lb. – marine duty with brake (for lifting) 4 inch drum width4000330025001/4
5/16
3/8
13
9
7
83
56
40
190
120
89
19.54:110 lb.
(double gear)
83
M49210,000 lb. – marine duty (for pulling only)10,000740054005/16
3/8
1/2
27
21
15
240
170
100
540
390
230
5.00:125.00:18 lb.
(double gear)
166
M492B10,000 lb. – marine duty with brake (for lifting)10,000740054005/16
3/8
1/2
27
21
15
240
170
100
540
390
230
25.00:18 lb.
(double gear)
173
M492-1210,000 lb. – marine duty (for pulling only) 12 inch drum width10,000740054005/16
3/8
1/2
46
37
27
380
270
160
850
610
360
5.00:125.00:18 lb.
(double gear)
175
M492B-1210,000 lb. – marine duty with brake (for lifting) 12 inch drum width10,000740054005/16
3/8
1/2
46
37
27
380
270
160
850
610
360
25.00:18 lb.
(double gear)
190
MB451disc brake only for M452 (for lifting)13
MB491disc brake only for M492 and M492-12 (for lifting)15
HW452hand wheel only for M452 (for pulling only)19
HW492hand wheel only for M492 and M492-12 (for pulling only)20

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.