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| Quantity: | |
|---|---|
DF-482
HEE
CAST STEEL KEVEL CHOCK
| MODEL NO. | A | B | C | D | E | WT.(lbs) |
| DF-30 | 24" | 9" | 10 1/2" | 5-5/8" | 7 1/2" | 50 |
| DF-481 | 30" | 14 1/4" | 19 1/2" | 6-3/4" | 9" | 88 |
| DF-482 | 36" | 17" | 23" | 8" | 11" | 100 |
| DF-483 | 42" | 20" | 26 3/4" | 9" | 12 1/2" | 160 |
| DF-484 | 48" | 23" | 30" | 10" | 14" | 220 |
The DF-30-484 Cast Steel Kevel Chock stands as a specialized mooring component engineered for vertical or angled rope lead applications where space constraints and load directionality are critical factors. As modern vessel designs optimize deck space while increasing mooring loads, this kevel chock provides a compact solution for guiding ropes from winches to bitts at precise angles . Constructed from ASTM A27 grade cast steel with a safe working load (SWL) of 900 kN (91.8 tons), it features a unique L-shaped design with a 16-inch long throat that accommodates rope diameters from 45mm to 80mm. Its low-profile construction (10 inches in height) makes it ideal for installation on vessel bulwarks, deck edges, and confined spaces where traditional chocks cannot fit, particularly on military vessels, research ships, and specialized offshore platforms.
The kevel chock features a 30° angled throat with a continuously radiused surface (12:1 bend ratio) that maintains rope integrity during directional changes . The entry port includes a flared opening (15° angle) that guides ropes into the main channel while reducing abrasion. This design minimizes rope strength loss to less than 10% during angular lead applications.
Manufactured using precision investment casting, the chock achieves complex geometry with uniform material properties throughout its structure . Critical load-bearing areas feature 1.5-inch thick walls with integral ribbing that increases stiffness by 40% compared to standard cast chocks. The mounting base includes a 20-inch long reinforcing plate with countersunk holes for flush mounting.
The chock receives a multi-stage coating process: sandblasting to SA 2.5, application of 120μm zinc-rich epoxy primer, and a 70μm polyurethane topcoat with UV inhibitors . All rope contact surfaces are polished to Ra 1.6μm finish to minimize friction. Stainless steel drainage plugs at the lowest points prevent water accumulation in the throat.
The kevel design is specifically engineered for angular rope leads (15-45° from horizontal), providing superior load distribution and rope guidance in applications where ropes must change direction between winch and bitt . This eliminates the need for multiple chocks to achieve proper rope alignment.
The radiused throat is optimized for both steel wire ropes and high-performance synthetic ropes (including HMPE and polyester) within the 45-80mm diameter range . The polished surface prevents fiber damage in synthetics while reducing wear in steel ropes.
It excels in bulwark-mounted applications, deck edge installations, and confined spaces where traditional chocks cannot fit . Common applications include military vessels, research ships, offshore supply vessels, and any situation requiring directional rope guidance with minimal deck footprint.
The DF-30-484 is certified to ISO 13713 standards and meets military specification MIL-DTL-24855 for naval vessels . It is approved by ABS, DNV, and Lloyd’s Register for commercial marine applications.
Weekly inspections should check for rope wear patterns and debris in the throat . Monthly maintenance includes cleaning the rope path and lubricating any moving components. Annual inspections should verify coating integrity and measure throat dimensions to detect excessive wear (maximum allowable 3mm reduction from original radius).
CAST STEEL KEVEL CHOCK
| MODEL NO. | A | B | C | D | E | WT.(lbs) |
| DF-30 | 24" | 9" | 10 1/2" | 5-5/8" | 7 1/2" | 50 |
| DF-481 | 30" | 14 1/4" | 19 1/2" | 6-3/4" | 9" | 88 |
| DF-482 | 36" | 17" | 23" | 8" | 11" | 100 |
| DF-483 | 42" | 20" | 26 3/4" | 9" | 12 1/2" | 160 |
| DF-484 | 48" | 23" | 30" | 10" | 14" | 220 |
The DF-30-484 Cast Steel Kevel Chock stands as a specialized mooring component engineered for vertical or angled rope lead applications where space constraints and load directionality are critical factors. As modern vessel designs optimize deck space while increasing mooring loads, this kevel chock provides a compact solution for guiding ropes from winches to bitts at precise angles . Constructed from ASTM A27 grade cast steel with a safe working load (SWL) of 900 kN (91.8 tons), it features a unique L-shaped design with a 16-inch long throat that accommodates rope diameters from 45mm to 80mm. Its low-profile construction (10 inches in height) makes it ideal for installation on vessel bulwarks, deck edges, and confined spaces where traditional chocks cannot fit, particularly on military vessels, research ships, and specialized offshore platforms.
The kevel chock features a 30° angled throat with a continuously radiused surface (12:1 bend ratio) that maintains rope integrity during directional changes . The entry port includes a flared opening (15° angle) that guides ropes into the main channel while reducing abrasion. This design minimizes rope strength loss to less than 10% during angular lead applications.
Manufactured using precision investment casting, the chock achieves complex geometry with uniform material properties throughout its structure . Critical load-bearing areas feature 1.5-inch thick walls with integral ribbing that increases stiffness by 40% compared to standard cast chocks. The mounting base includes a 20-inch long reinforcing plate with countersunk holes for flush mounting.
The chock receives a multi-stage coating process: sandblasting to SA 2.5, application of 120μm zinc-rich epoxy primer, and a 70μm polyurethane topcoat with UV inhibitors . All rope contact surfaces are polished to Ra 1.6μm finish to minimize friction. Stainless steel drainage plugs at the lowest points prevent water accumulation in the throat.
The kevel design is specifically engineered for angular rope leads (15-45° from horizontal), providing superior load distribution and rope guidance in applications where ropes must change direction between winch and bitt . This eliminates the need for multiple chocks to achieve proper rope alignment.
The radiused throat is optimized for both steel wire ropes and high-performance synthetic ropes (including HMPE and polyester) within the 45-80mm diameter range . The polished surface prevents fiber damage in synthetics while reducing wear in steel ropes.
It excels in bulwark-mounted applications, deck edge installations, and confined spaces where traditional chocks cannot fit . Common applications include military vessels, research ships, offshore supply vessels, and any situation requiring directional rope guidance with minimal deck footprint.
The DF-30-484 is certified to ISO 13713 standards and meets military specification MIL-DTL-24855 for naval vessels . It is approved by ABS, DNV, and Lloyd’s Register for commercial marine applications.
Weekly inspections should check for rope wear patterns and debris in the throat . Monthly maintenance includes cleaning the rope path and lubricating any moving components. Annual inspections should verify coating integrity and measure throat dimensions to detect excessive wear (maximum allowable 3mm reduction from original radius).
