Mast Wedges

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. Traditionally made of Wood, most are now made from a more flexible Rubber compound. The size of required Mast Wedges is determined by the gap between the Mast and the Deck Collar. Complete dimensions of all Mast Wedges are provided below, to assist you in determining suitability for your application. Some Masts have been supplied with a Special One-piece molded Urethane Mast Collar Wedge that fits a specific Mast Section and a specific Deck Collar. As these items are Section specific, you must first identify your Mast Section. See Isomat Mast Sections and Sparcraft Mast Sections. Mast Wedges, and the entire Mast/Deck junction, are often covered by Mast Boots to help prevent water intrusion and improve appearance. See also: Deck Collars, Mast Boots, Mast Boot Clamps, and Mast Boot Tape.

Mast Wedge with Flange: K-77509-___": Kenyon Extruded Black Rubber 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 length in inches in part number. This item is also available in 1 1/2" lengths, below, and in specific lengths for Kenyon Mast Sections, See individual Kenyon Mast Sections for specific Part Numbers.
Mast Wedge with Flange - 1 1/2" long: K-77509-1.5": Kenyon Extruded Black 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 and others.
*Mast Wedge w/ Flange - 2 1/4" long: Sch 77-99X-2.2:* *Mast Wedge w/ Flange - 3" long: Sch 77-99X-3:* *Mast Wedge w/ Flange - 4" long: Sch 77-99X-4:* *Mast Wedge w/ Flange - 5" long: Sch 77-99X-5:* *Mast Wedge w/ Flange - 6" long: Sch 77-99X-6:* Original White Mast Wedge with Flange as used with a variety of Schaefer and Hall Spars. Extruded Vinyl Wedge is 1 7/8" high x (maximum) 9/16" thick. Normally used 4 or 6 pieces per mast, it is available in a variety of lengths. As used on J/27, J/34, and others.
*Mast Wedge – Small Rubber: NGA-18:* Heavy Extruded Rubber Wedge for use with Isomat and other Masts. Small stepped Black Rubber Wedge is used to support the mast as it passes through the Deck Collar, it is suitable for use where the gap between the Mast and the Deck Collar is 1/2" - 7/8". Wedge is 2 3/4" (70mm) high x 1 1/8" (28mm) wide, and is 15/16" (24mm) thick at the top tapering to 3/8" (10mm) thick at the bottom. Most Isomat Deck Collars require a variety of Small, and Large Mast Wedges, NGA-19. Note: these items replace, and are superior to, the Wood Wedges still used in French production. Available in longer widths (lengths) for Special applications.
*Mast Wedge – Large Rubber: NGA-19:* Heavy Extruded Rubber Wedge for use with Isomat and other Masts. Large stepped Black Rubber Wedge is used to support the mast as it passes through the Deck Collar, it is suitable for use where the gap between the Mast and the Deck Collar is 3/4" - 1 1/4". Wedge is 2 3/4" (70mm) high x 1 1/8" (28mm) wide, and is 1 3/8" (35mm) thick at the top tapering to 11/16" (18mm) thick at the bottom. Most Isomat Deck Collars require a variety of Large, and Small Mast Wedges, NGA-18. Note: these items replace, and are superior to, the Wood Wedges still used in French production. Available in longer widths (lengths) for Special applications.

Urethane Mast Collar Wedges Some Masts have been supplied with a Special One-piece molded Urethane Mast Collar Wedge that fits a specific Mast Section and a specific Deck Collar. As these items are Section specific, you must first identify your Mast Section to select the proper replacement.
*Urethane Mast Collar Wedge for 5 3/8" OD Round Mast: PP F25572MC:* Special molded Urethane Mast Collar/Wedge for 5 3/8" OD Round Mast. Round Mast Collar is 6 5/8" OD x 5 3/8" ID x 2 3/8" high and fits between the Mast and the Deck. One piece molded construction means that Mast Collar must be put on the Mast before it is stepped, outside of Collar is slightly tapered to ease fitting into Deck. As used on Freedom 21. * Special Round Black Mast Boot to fit Freedom 21 is PP RM5.5-MBF, See: Mast Boots.**
Urethane Mast Collar Wedges for Isomat Masts: Some Isomat Masts using Special (non-standard) Deck Collars have been supplied with Special one-piece Urethane Mast Wedges that are Section specific. For these items you must first identify your Mast Section, and sometimes your specific Deck Collar, See individual Isomat Mast Sections for specific Part Numbers. One piece molded construction means that these Mast Wedges must be put on the Mast before it is stepped.
Urethane Mast Collar Wedges for Kenyon Masts: Special Urethane Mast Collars are designed for a variety of Kenyon Mast Sections. One-piece molded Mast Collar with flange provides even support all around the mast, fitting both between the Mast and the Deck Collar, *and* between the Deck Collar and the Deck. One piece molded construction means that these Mast Collars must be put on the Mast before it is stepped. As these items are Section specific, you must first identify your Mast Section. See individual Kenyon Mast Sections for specific Part Numbers.
Urethane Mast Collar Wedges for Sparcraft Masts: Some Sparcraft Masts have been supplied with Special one-piece Urethane Mast Wedges that are Section specific. For these items you must first identify your Mast Section, and your specific Deck Collar, See individual Sparcraft Mast Sections for specific Part Numbers. One piece molded construction means that these Mast Wedges must be put on the Mast before it is stepped.

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