Grumbles

This article deals with the endless ring made of rope or steel wire. For the hay that was brought in by the second (or third) cut in a year, see hay .

Making a grummet

A rowen , Grummetstropp or Taukranz is an endless ring crafted from harvested (twisted) rope or steel wire .

Folded cordage often consists of three cardeles twisted around each other (partial strands or "veins" of the cordage). A single cardel, detached from it, is then placed three times in a circle and wound around itself in such a way that the resulting grummet looks like an (endless) three-carded piece of rope again. Grummets made of four-fold rope are twisted four times in a circle, etc. Grummets made of steel wire are made accordingly.

Grummetstroppen, especially made of steel wire, are used as slings for lifting loads, for example as a connection between the load and crane hook, and can be provided with a steel insert. According to a Grummet distributor, individual load capacities of up to 9500 tons are possible with Grummets.

In traditional shipping, grummets made of cordage are used: to connect hooks, as box handles, to extend a line (cordage), etc.

A small grummet was used by early sailmakers as a base for a sewn gate .

See also

• Strop
• Grommet

literature

• U. Scharnow: Lexicon of seafaring . 5th, arr. u. additional edition, transpress VEB Verlag für Verkehrwesen, Berlin 1988, ISBN 3-344-00190-6 , p. 218.

Individual evidence

1. ↑ Grummets . Voigt Seilerei, accessed May 24, 2018.
2. ↑ The Little Boatswain 9.0 (PDF; 12.2 MB). P. 31, accessed April 18, 2013 (publication by Roald Amundsen ).

Web links

• Load capacity table FOR GRUMMET SLING IN ACCORDANCE WITH EN 13414-3 (accessed on July 10, 2020)
• Use of wire rope slings (accessed July 10, 2020)
• Operating instructions for Grummets cable sling sling (accessed on July 10, 2020)
• Endless sling ropes (accessed on July 10, 2020)
• Grummet slings and cable lay ropes (accessed July 10, 2020)