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M4312PB

M4312PB

Spur Gear Series — Model M4022-PB & M4312-PB.

Up to 2,000 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 2,000 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

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WARNINGS & CAUTIONS

WARNINGS & CAUTIONS

Series Imperial
Load Rating Finish Drum Brake Drum Capacity Force to Lift 1,000 lbs
M4022PB 1,000 lbs Clear Zinc Plating Narrow Yes 130ft 41 lbs
M4032PB 1,000 lbs Clear Zinc Plating Wide Yes 250 ft 41 lbs
M4042PBSS 1,000 lbs Stainless Wide Yes 240 ft 46 lbs
M4312PB 2,000 lbs Clear Zinc Plating Narrow Yes 110 ft 17 lbs
M4312PBSS 2,000 lbs Stainless Narrow Yes 110 ft 17 lbs
M4412PB 2,000 lbs Clear Zinc Plating Wide Yes 210ft 17 lbs
Series Imperial
Load Rating Finish Drum Brake Drum Capacity Force to Lift 1,000 lbs
M4022PB 450 kg Clear Zinc Plating Narrow Yes 39 m 19 kg
M4032PB 450 kg Clear Zinc Plating Wide Yes 76 m 19 kg
M4042PBSS 450 kg Stainless Wide Yes 73 m 21 kg
M4312PB 905 kg Clear Zinc Plating Narrow Yes 33 m 8 kg
M4312PBSS 905 kg Stainless Narrow Yes 33 m 8 kg
M4412PB 905 kg Clear Zinc Plating Wide Yes 64 m 8 kg

Configurations and Performance Characteristics-Up to 2,000 lbs

Model Description LOAD RATING Wire Rope Dia.1 DRUM CAPACITY 2 Single
Gear
Ratio		 Double
Gear
Ratio		 Force3
to lift
1,000 lb		 Approx.
Ship
Weight
1st Layer Mid Drum Full Drum 1st Layer Mid Drum Full Drum
(lb) (kg) (lb) (kg) (lb) (kg) (in) (mm) (ft) (m) (ft) (m) (ft) (m) (lb) (kg) (lb) (kg)
M401 500 lb-marine duty (for pulling only) 500 226 400 181 300 136 1/8 3.2 7 2 60 18 130 39 — — — — 8 3
3/16 4.8 4 1 27 8 60 18
M4022 1,000 lb-marine duty (for pulling only) 1,000 453 700 317 500 226 1/8 3.2 4 1 52 15 130 39 2.85:1 — 40 18.1 12 5
3/16 4.8 3 0.9 26 7 57 17
M4022PB 1,000 lb-marine duty with brake (for lifting) 1,000 453 700 317 500 226 1/8 3.2 4 1 52 15 130 39 2.85:1 — 41 18.6 17 7
3/16 4.8 3 0.9 26 7 57 17
M4032 1,000 lb-marine duty (for pulling only) 1,000 453 700 317 500 226 1/8 3.2 11 3 110 33 250 76 2.85:1 — 40 18.1 14 6
3/16 4.8 7 2 51 15 110 33
M4032PB 1,000 lb-marine duty with brake (for lifting) 1,000 453 700 317 500 226 1/8 3.2 11 3 110 33 250 76 2.85:1 — 41 18.6 18 8
3/16 4.8 7 2 51 15 110 33
M4042PBSS 1,000 lb-stainless steel with brake (for lifting) 1,000 453 800 362 600 272 3/16 3.2 12 3 110 33 240 73 3.83:1 14.7:1 46 20.9 24 10
1/4 4.8 8 2 48 14 110 33 (sgl gear)
5/16 6.4 5 1 27 8 59 17
M4312 2,000 lb-marine duty (for pulling only) 2,000 907 1,600 725 1,200 544 3/16 4.8 8 2 48 14 110 33 3.83:1 14.7:1 20 9.1 23 10
1/4 6.4 5 1 27 8 59 17 (dbl gear)
5/16 7.9 4 1 17 5 39 11
M4312PB 2,000 lb-marine duty with brake (for lifting) 2,000 907 1,600 725 1,200 544 3/16 4.8 8 2 48 14 110 33 — 14.7:1 17 7.7 28 12
1/4 6.4 5 1 27 8 59 17 (dbl gear)
5/16 7.9 4 1 17 5 39 11
M4312PBSS 2,000 lb-stainless steel with brake (for lifting) 2,000 907 1,600 725 1,200 544 3/16 4.8 8 2 48 14 110 33 — 14.7:1 17 7.7 28 12
1/4 6.4 5 1 27 8 59 17 (dbl gear)
5/16 7.9 4 1 17 5 39 11
M4412 2,000 lb-marine duty (for pulling only) 2,000 907 1,600 725 1,200 544 3/16 4.8 18 5 97 29 210 64 3.83:1 14.7:1 20 9.1 25 11
1/4 6.4 14 4 52 15 120 36 (dbl gear)
5/16 7.9 11 3 35 10 77 23
M4412PB 2,000 lb-marine duty with brake (for lifting) 2,000 907 1,600 725 1,200 544 3/16 4.8 18 5 97 29 210 64 — 14.7:1 17 7.7 30 13
1/4 6.4 14 4 52 15 120 36 (dbl gear)
5/16 7.9 11 3 35 10 77 23

Please contact Thern or nearest Thern Distributor for firm fixed price and delivery.
1For Models M4022, M4022PB, M4032, and M4032PB, ball end is available for 1/8 inch and 3/16 inch only. For Models 4042PBSS, M4312, M4312PB, M4312PBSS, M4412, and M4412PB, ball end is availab le for 3/1 6-inch and 1/4 inch.
only.
2Actual drum capacities may be 25-30% less due to non uniform winding. Wire rope tension will also affect drum capacity.
3Approximate handle force required to lift 1,000 lbs with an empty drum and maximum handle length.

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 PB or B suffix

Corrosion Resistant
Trivalent zinc plated finish protects against corrosion in harsh environments.

Quick Disconnect Anchor
For quickly attaching or removing wire rope equipped with a swaged ball fitting.

Bronze and Radial Ball Bearings
Provide smooth and efficient operation.

Automatic Brake
Internal mechanical brake provides positive load control for lifting and lowering operations.

Bronze and Radial Ball Bearings
Provide smooth and efficient operation.

Large Diameter Drums
Minimize wear to extend wire rope life.

Gear Covers
Protect gears and help prevent injuries.

Stainless Steel Models Available
For harsh environments. See models with SS suffix. Stainless steel models are electro-polished for added corrosion resistance.

Two-Year Warranty
Industry-leading two-year limited warranty on all our products.

 

 

 

WARNING: Prop 65: Products supplied by CERTEX USA may expose you to chemicals including Nickel, which is known to the State of California to cause cancer. For more information, visit to www.P65Warnings.ca.gov.

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