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- Crosby McKissick and Lebus Pulley / Crane Blocks/
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- Crosby McKissick RP High Capacity Oilfield Drilling Blocks, WLL Range from 50,000kg to 1000 tonne

- Capacities Available: 250, 350, 500, 750 and 1000 Tons.
- Double row, pre-adjusted tapered bearings with seals.
- Blocks contain McKissick® Roll-Forged sheaves with flame hardened grooves.
- Grooves are API profile.
- Separate lubrication channel to each sheave.
- Bail design to adapt to comparable capacity drilling equipment.
- Additional weights available upon request.
- Manufactured to the requirements of API 8C, including all documentation.
- Each block is individually serialized for full traceability.
- Furnished with Certificate of Conformance.
- Minimum design temperature of -20 degree C (-4 degree F).
- Standard top coat finish is safety orange enamel.
- Other paint colors and systems are available on request.
- Individual parts are primer coated on exposed surfaces.
- Block side plates can be drilled to adapt customer supplied equipment.
- Easy bail pin removal.
- All sizes are RFID EQUIPPED.
Metric Dimensions & Specifications
| Working Load Limit Tonnes | Sheave Diameter (mm) | Standard Wire Rope Size (mm)* | Weight Each (kg.) | Dimensions (mm) | ||||||||||
| A | B | C | D | E | F | H | J | K | L | M | ||||
| 250 | 914 | 28 | 2540 | 1880 | 1600 | 279 | 914 | 991 | 616 | 127 | 63.5 | 88.9 | 276 | 202 |
| 250 | 1067 | 28 | 3198 | 2032 | 1753 | 279 | 1067 | 1118 | 616 | 127 | 63.5 | 88.9 | 276 | 202 |
| 350 | 1067 | 32 | 3243 | 2032 | 1753 | 279 | 1067 | 1118 | 616 | 127 | 63.5 | 88.9 | 276 | 202 |
| 500 | 1524 | 35 | 7303 | 2496 | 2140 | 356 | 1524 | 1562 | 382 | 152 | 88.9 | 102 | 381 | 324 |
| 750 | 1524 | 38 | 9888 | 2724 | 2343 | 381 | 1524 | 1562 | 991 | 229 | 114 | 127 | 470 | 432 |
| 1000 | 1829 | 44 | 17463 | 3232 | 2775 | 457 | 1829 | 1829 | 1226 | 229 | 127 | 159 | 502 | 540 |
Imperial Dimensions & Specifications
| Working Load Limit Tonnes | Sheave Diameter (in.) | Standard Wire Rope Size (in.)* | Weight Each (lbs.) | Dimensions (in.) | ||||||||||
| A | B | C | D | E | F | H | J | K | L | M | ||||
| 250 | 36 | 1-1/8 | 5600 | 74.00 | 63.00 | 11.00 | 36.00 | 39.00 | 24.25 | 5.00 | 2.50 | 3.50 | 10.88 | 7.94 |
| 250 | 42 | 1-1/8 | 7050 | 80.00 | 69.00 | 11.00 | 42.00 | 44.00 | 24.25 | 5.00 | 2.50 | 3.50 | 10.88 | 7.94 |
| 350 | 42 | 1-1/4 | 7150 | 80.00 | 69.00 | 11.00 | 42.00 | 44.00 | 24.25 | 5.00 | 2.50 | 3.50 | 10.88 | 7.94 |
| 500 | 60 | 1-3/8 | 16100 | 98.25 | 84.25 | 14.00 | 60.00 | 61.50 | 32.75 | 6.00 | 3.50 | 4.00 | 15.00 | 12.75 |
| 750 | 60 | 1-1/2 | 21800 | 107.25 | 92.25 | 15.00 | 60.00 | 61.50 | 39.00 | 9.00 | 4.50 | 5.00 | 18.50 | 17.00 |
| 1000 | 72 | 1-3/4 | 38500 | 127.25 | 109.25 | 18.00 | 72.00 | 74.00 | 48.25 | 9.00 | 5.00 | 6.25 | 19.75 | 21.25 |
* May be furnished in other wire rope sizes.
Contact Us About This Product
If you wish to receive a quote for this product, please use the tab, this form is for general enquiries regarding this product only.
You can also request a quote through the pricing tab!
You can easily add more than one item to the Quote Request. This is highly recommended as we will be able to suit your needs much more efficiently.
Share this page!

- Capacities Available: 250, 350, 500, 750 and 1000 Tons.
- Double row, pre-adjusted tapered bearings with seals.
- Blocks contain McKissick® Roll-Forged sheaves with flame hardened grooves.
- Grooves are API profile.
- Separate lubrication channel to each sheave.
- Bail design to adapt to comparable capacity drilling equipment.
- Additional weights available upon request.
- Manufactured to the requirements of API 8C, including all documentation.
- Each block is individually serialized for full traceability.
- Furnished with Certificate of Conformance.
- Minimum design temperature of -20 degree C (-4 degree F).
- Standard top coat finish is safety orange enamel.
- Other paint colors and systems are available on request.
- Individual parts are primer coated on exposed surfaces.
- Block side plates can be drilled to adapt customer supplied equipment.
- Easy bail pin removal.
- All sizes are RFID EQUIPPED.
Metric Dimensions & Specifications
| Working Load Limit Tonnes | Sheave Diameter (mm) | Standard Wire Rope Size (mm)* | Weight Each (kg.) | Dimensions (mm) | ||||||||||
| A | B | C | D | E | F | H | J | K | L | M | ||||
| 250 | 914 | 28 | 2540 | 1880 | 1600 | 279 | 914 | 991 | 616 | 127 | 63.5 | 88.9 | 276 | 202 |
| 250 | 1067 | 28 | 3198 | 2032 | 1753 | 279 | 1067 | 1118 | 616 | 127 | 63.5 | 88.9 | 276 | 202 |
| 350 | 1067 | 32 | 3243 | 2032 | 1753 | 279 | 1067 | 1118 | 616 | 127 | 63.5 | 88.9 | 276 | 202 |
| 500 | 1524 | 35 | 7303 | 2496 | 2140 | 356 | 1524 | 1562 | 382 | 152 | 88.9 | 102 | 381 | 324 |
| 750 | 1524 | 38 | 9888 | 2724 | 2343 | 381 | 1524 | 1562 | 991 | 229 | 114 | 127 | 470 | 432 |
| 1000 | 1829 | 44 | 17463 | 3232 | 2775 | 457 | 1829 | 1829 | 1226 | 229 | 127 | 159 | 502 | 540 |
Imperial Dimensions & Specifications
| Working Load Limit Tonnes | Sheave Diameter (in.) | Standard Wire Rope Size (in.)* | Weight Each (lbs.) | Dimensions (in.) | ||||||||||
| A | B | C | D | E | F | H | J | K | L | M | ||||
| 250 | 36 | 1-1/8 | 5600 | 74.00 | 63.00 | 11.00 | 36.00 | 39.00 | 24.25 | 5.00 | 2.50 | 3.50 | 10.88 | 7.94 |
| 250 | 42 | 1-1/8 | 7050 | 80.00 | 69.00 | 11.00 | 42.00 | 44.00 | 24.25 | 5.00 | 2.50 | 3.50 | 10.88 | 7.94 |
| 350 | 42 | 1-1/4 | 7150 | 80.00 | 69.00 | 11.00 | 42.00 | 44.00 | 24.25 | 5.00 | 2.50 | 3.50 | 10.88 | 7.94 |
| 500 | 60 | 1-3/8 | 16100 | 98.25 | 84.25 | 14.00 | 60.00 | 61.50 | 32.75 | 6.00 | 3.50 | 4.00 | 15.00 | 12.75 |
| 750 | 60 | 1-1/2 | 21800 | 107.25 | 92.25 | 15.00 | 60.00 | 61.50 | 39.00 | 9.00 | 4.50 | 5.00 | 18.50 | 17.00 |
| 1000 | 72 | 1-3/4 | 38500 | 127.25 | 109.25 | 18.00 | 72.00 | 74.00 | 48.25 | 9.00 | 5.00 | 6.25 | 19.75 | 21.25 |
* May be furnished in other wire rope sizes.
Contact Us About This Product
If you wish to receive a quote for this product, please use the tab, this form is for general enquiries regarding this product only.
You can also request a quote through the pricing tab!
You can easily add more than one item to the Quote Request. This is highly recommended as we will be able to suit your needs much more efficiently.
Share this page!