Crosby M- 491 McKissick Oilfield Hoist Blocks. Options Galvanized or Painted - Range from 4000kg to 15,000kg

Oilfield Servicing- Tower/Derrick Hoist Blocks.

Model: 

McKissick M-491 / OHB-2532


New design provides the dependability of standard McKissick Snatch Blocks, along with features that make it perfect for the challenging needs of Tugger Hoist and Tower Erection applications.

  • A wide variety of configurations:
  • 4, 8, 12, 15, 25 or 30 metric ton capacity.
  • 10, 13, 16, 19, 22, 25 and 32mm Wireline sizes.
  • Painted or Galvanized finish.
  • 203mm  and 254mm blocks furnished with dual rated Wireline sheaves.
  • Forged steel swivels, tees, yokes and shackles are Quenched & Tempered.
  • Sheave lubrication through center pin for easy maintenance.
  • Design factor of 4 to 1.
  • All blocks 356mm and larger are furnished with McKissick® Roll Forged sheaves with flame hardened grooves.
  • Recessed side plate design reduces the gap between the sheave rim and the side plate, allowing the sheave assembly to be captured in the block if loss of center pin occurs.
  • Sealed tapered roller bearings extend the life of the center pin and bearings, and allows for faster line speeds than recommended with standard snatch blocks.
  • Shackle fitting swivels for easy positioning.
  • Suitable for hoisting personnel, contingent upon all employees, including the winch operator, being trained to follow applicable Federal, local and industry standards.
  • Tugger / Derrick applications: API RP54.
  • Tower applications: OSHA directive CPL 2-1.36.
  • Holes through side plates are available for secondary block securing device.
  • Manufactured by an API Q1 Certified facility.
  • Type Approval and certification in accordance with ABS 2006 Steel Vessel Rules 1-1-17.7, and ABS Guide for Certification of Cranes.
  • All sizes are RFID EQUIPPED.

Imperial Specifications

Working Load Limit (t)* Sheave Diameter (in.) Wire Rope Size (in.) M-491 S Stock No. Painted M-491 G Stock No. Galvanized Weight Each (lbs.)
4 8 3/8 - 1/2 2020161 2020170 35
8 10 3/8 - 1/2 2020806 2020815 55
8 10 1/2 - 9/16 2020824 2020833 55
12 10 1/2 - 9/16 2021118 2021127 55
12 14 5/8 2021136 2021145 95
12 14 3/4 2021154 2021163 95
15 16 7/8 2021172 2021181 150
15 16 1 2021190 2021199 150

Metric Specifications

Working Load Limit (t)* Sheave Diameter (mm) Wire Rope Size (mm) M-491S Stock No. Painted M-491G Stock No. Galvanized Weight Each (kg.)
4 203 10 - 13 2020161 2020170 16
8 254 10 - 13 2020806 2020815 25
8 254 13 - 14 2020824 2020833 25
12 254 13 - 14 2021118 2021127 25
12 356 16 2021136 2021145 43
12 356 19 2021154 2021163 43
15 406 22 2021172 2021181 68
15 406 25 2021190 2021199 48

* Ultimate Load is 4 times the Working Load Limit.

Crosby-catalogue-page-number-342-349.pdf

Product Warnings

PDF containing all warning information relevant to the safe use of this product
(approx. 0.5Mb)
M491.pdf

Technical Specification / Dimensional Drawings

(approx. 0.4Mb)
crosby-catalogue-page-332.pdf

Crosby catalogue page 332

(approx. 0.2Mb)
Finish Type
Part N° Working Load Limit (t)* Sheave Diameter (mm) Wire Rope Size (mm) Weight Each (kg.) Guide Price Quantity
2532-T1546
2020170
4 203 10 - 13 16 £  1228.00
2532-T1547
2020815
8 254 10 - 13 25 £  1709.00
2532-T1548
2020833
8 254 13 - 14 25 £  1709.00
2532-T1549
2021127
12 254 13 - 14 25 £  1923.00
2532-T1550
2021145
12 356 16 43 £  2331.00
2532-T1551
2021163
12 356 19 43 £  2331.00
2532-T1552
2021181
15 406 22 68 £  3553.00
2532-T1553
2021199
15 406 25 48 £  3553.00
Add to Quote Basket   ?  

New design provides the dependability of standard McKissick Snatch Blocks, along with features that make it perfect for the challenging needs of Tugger Hoist and Tower Erection applications.

  • A wide variety of configurations:
  • 4, 8, 12, 15, 25 or 30 metric ton capacity.
  • 10, 13, 16, 19, 22, 25 and 32mm Wireline sizes.
  • Painted or Galvanized finish.
  • 203mm  and 254mm blocks furnished with dual rated Wireline sheaves.
  • Forged steel swivels, tees, yokes and shackles are Quenched & Tempered.
  • Sheave lubrication through center pin for easy maintenance.
  • Design factor of 4 to 1.
  • All blocks 356mm and larger are furnished with McKissick® Roll Forged sheaves with flame hardened grooves.
  • Recessed side plate design reduces the gap between the sheave rim and the side plate, allowing the sheave assembly to be captured in the block if loss of center pin occurs.
  • Sealed tapered roller bearings extend the life of the center pin and bearings, and allows for faster line speeds than recommended with standard snatch blocks.
  • Shackle fitting swivels for easy positioning.
  • Suitable for hoisting personnel, contingent upon all employees, including the winch operator, being trained to follow applicable Federal, local and industry standards.
  • Tugger / Derrick applications: API RP54.
  • Tower applications: OSHA directive CPL 2-1.36.
  • Holes through side plates are available for secondary block securing device.
  • Manufactured by an API Q1 Certified facility.
  • Type Approval and certification in accordance with ABS 2006 Steel Vessel Rules 1-1-17.7, and ABS Guide for Certification of Cranes.
  • All sizes are RFID EQUIPPED.

Imperial Specifications

Working Load Limit (t)* Sheave Diameter (in.) Wire Rope Size (in.) M-491 S Stock No. Painted M-491 G Stock No. Galvanized Weight Each (lbs.)
4 8 3/8 - 1/2 2020161 2020170 35
8 10 3/8 - 1/2 2020806 2020815 55
8 10 1/2 - 9/16 2020824 2020833 55
12 10 1/2 - 9/16 2021118 2021127 55
12 14 5/8 2021136 2021145 95
12 14 3/4 2021154 2021163 95
15 16 7/8 2021172 2021181 150
15 16 1 2021190 2021199 150

Metric Specifications

Working Load Limit (t)* Sheave Diameter (mm) Wire Rope Size (mm) M-491S Stock No. Painted M-491G Stock No. Galvanized Weight Each (kg.)
4 203 10 - 13 2020161 2020170 16
8 254 10 - 13 2020806 2020815 25
8 254 13 - 14 2020824 2020833 25
12 254 13 - 14 2021118 2021127 25
12 356 16 2021136 2021145 43
12 356 19 2021154 2021163 43
15 406 22 2021172 2021181 68
15 406 25 2021190 2021199 48

* Ultimate Load is 4 times the Working Load Limit.

Crosby-catalogue-page-number-342-349.pdf

Product Warnings

PDF containing all warning information relevant to the safe use of this product
(approx. 0.5Mb)
M491.pdf

Technical Specification / Dimensional Drawings

(approx. 0.4Mb)
crosby-catalogue-page-332.pdf

Crosby catalogue page 332

(approx. 0.2Mb)
Finish Type
Part N° Working Load Limit (t)* Sheave Diameter (mm) Wire Rope Size (mm) Weight Each (kg.) Guide Price Quantity
2532-T1546
2020170
4 203 10 - 13 16 £  1228.00
2532-T1547
2020815
8 254 10 - 13 25 £  1709.00
2532-T1548
2020833
8 254 13 - 14 25 £  1709.00
2532-T1549
2021127
12 254 13 - 14 25 £  1923.00
2532-T1550
2021145
12 356 16 43 £  2331.00
2532-T1551
2021163
12 356 19 43 £  2331.00
2532-T1552
2021181
15 406 22 68 £  3553.00
2532-T1553
2021199
15 406 25 48 £  3553.00
Add to Quote Basket   ?  

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