Lofrans Stainless Steel ISO/DIN Chain Stopper

The Lofrans stainless steel anchor chain stopper is installed between the windlass and bow roller to mechanically block the anchor chain and take load off the windlass. Choose part 636257 for compatible 8mm or 10mm chain systems, or part 636604 for compatible 10mm or 12mm chain systems.

Manufactured from AISI 316L stainless steel, the stopper provides a dedicated chain-retaining point between the anchor windlass and bow roller. It helps prevent unwanted chain movement and reduces the load carried by the windlass when the anchor is deployed or secured.

Compatibility depends on the selected part number, anchor-chain diameter, chain calibration and windlass model. Chain size alone is not sufficient; the chain must be ISO or DIN calibrated and the stopper must be suitable for the installed Lofrans vertical windlass.

Key Features

• Genuine Lofrans anchor chain stopper
• Mechanically blocks and secures the anchor chain
• Takes anchor-chain load off the windlass
• Installs between the windlass and bow roller
• AISI 316L stainless steel construction
• Suitable for ISO and DIN calibrated chain
• Two versions for 8mm, 10mm or 12mm chain systems
• Compatible with selected Lofrans X, SX and Ercole vertical windlasses

Frequently Asked Questions

What does the Lofrans chain stopper do?
The stopper locks the anchor chain in position. This provides an additional mechanical holding point and prevents the windlass from carrying the full chain load while the anchor is deployed or secured.

Where is the chain stopper installed?
It is fitted on deck between the anchor windlass and the bow roller.

Which part number do I need?

• 636257: For compatible 8mm or 10mm ISO/DIN chain systems
• 636604: For compatible 10mm or 12mm ISO/DIN chain systems

The final selection must also match the installed windlass model.

Which windlasses accept part 636257?
Part 636257 is listed for the Lofrans X1, X2, X3, SX1, SX2, SX3 and SX3.5 vertical windlasses.

Which windlasses accept part 636604?
Part 636604 is listed for the Lofrans X2, X3, X4, SX2, SX3, SX3.5, SX4, SX5 and Ercole Vertical windlasses.

Can these chain stoppers be used with horizontal windlasses?
Lofrans lists these two part numbers for the specified vertical windlass models. Compatibility with a horizontal windlass should not be assumed.

Does chain diameter alone confirm compatibility?
No. Confirm the windlass model, chain diameter and ISO or DIN chain calibration before ordering.