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Spars, Rigging, and Hardware for Sailboats

Rig-Rite, Inc.
Phone: (001) 401-739-1140 -- FAX: (001) 401-739-1149
www.RigRite.com          Ordering/Questions

Isomat Mast Wedges


Mast Wedges are used on keel-stepped Rigs to support the Mast as it passes through the Deck Collar, as well as providing chafe protection between the two. Isomat Masts using standard Isomat Deck Collars are supplied with the NGA-series of Mast Wedges listed below. Most Masts require a combination of the small and large sizes, details of sizes and quantities for some Deck Collars can be found on the individual Mast Section pages, See Isomat Mast Sections and Sparcraft Mast Sections.  Isomat Masts using non-standard Deck Collars have sometimes used the Kenyon Mast Wedges, also listed below. Isomat and Sparcraft Masts, also use Section specific one-piece Deck Collar Wedges, See Isomat Mast Sections and Sparcraft Mast Sections. Complete dimensions of all Mast Wedges are provided below, to assist you in determining suitability for your application. For a more complete list including non-Isomat Mast Wedges, See Mast Wedges.

Mast Collar Wedge – Small Rubber: NGA-18:
Heavy Extruded Rubber Wedge for use with Isomat and other Masts. Small stepped Rubber Wedge is used to support the mast as it passes through the Deck Collar. Wedge is 2 3/4" (70mm) long x 1 1/8" (28mm) wide, and is 15/16" (24mm) thick at the top tapering to 3/8" (10mm) thick at the bottom.

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NGA-18
Mast Collar Wedge – Large Rubber: NGA-19:
Heavy Extruded Rubber Wedge for use with Isomat and other Masts. Large stepped Rubber Wedge is used to support the mast as it passes through the Deck Collar. Wedge is 2 3/4" (70mm) long x 1 1/8" (28mm) wide, and is 1 3/16" (30mm) thick at the top tapering to 11/16" (18mm) thick at the bottom.

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NGA-19
Mast Wedge with Flange - 1 1/2" long: K-77509-1.5:
Kenyon Extruded Rubber 1/2" Mast Wedge with Flange, K-77509, above, cut in 1 1/2" (40mm) long pieces. Suitable for use with a variety of Deck Collars, and as used by O'Day.

 

K-77509-1.5
Mast Wedge with Flange: K-77509-__:
Kenyon Extruded Rubber 1/2" Mast Wedge with Flange. Designed for Deck Collars where the Inside Diameter of the Collar is the same shape as the Mast, and 1/2" larger all around. Cut to a specific length for each Mast Section, one piece wraps around the mast equalizing loading at all points. This one-piece arrangement is superior to individual wedges, which can cause point loading leading to deformation. Also used in shorter pieces in various deck Collars where distance to the Mast wall approximates 1/2". This item is available cut to any length, please specify. This item is also available in specific lengths for Kenyon Mast Sections, See individual Kenyon Mast Sections for specific Part Numbers.

 

K-77509

Many Isomat and Sparcraft Masts, also use a variety of Section specific One-piece Deck Collar Wedges. The Special One-piece Molded Polyurethane Wedge fits like a glove to give maximum support to the mast as it passes through its' matching Deck Collar. As these items are specific to both the Mast Section and the Deck Collar you will need to identify your Mast Section to determine which part you need. See Isomat Mast Sections and Sparcraft Mast Sections.

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