72mm HTX Single Block
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LEWMAR72mm HTX Single Block


In stock online.
Model # 12873576 | Mfg # 29197201UPC # 743683219177
72mm HTX Single Block




72mm HTX Single Block

Name Value
Becket No Becket
Diameter 9/16 Inch or 14 mm
Direction Any
Integral Cleat No Integral Cleat
Mount Type Swivel Shackle
Ratchet Non Ratcheting
Safe Working Load 4400 Pounds
Sheave Diameter 72 mm
Type Single
Weight 15.52 Ounces

Product Overview

High quality blocks that have evolved from years of experience.

The 72mm single block is a workhorse. Practical for use as a turning block, for spinnaker sheets, running backs and so much more. The larger sheave is compatible with 9/16" line.

The HTX line is Lewmar’s answer to the racer/cruiser looking for a top quality block with racing type performance without having to pay a Grand Prix price. A collaboration with boat builders and sailors blended with years of manufacturing experience with have resulted in strong, efficient blocks made to handle high loads of today’s smaller diameter lines.

Aluminum cheeks add strength and rigidity to the block and serve as an excellent foundation for a combination of plain and ball bearings. The center plain bearing provides efficiency for high loads while Delrin® ball bearings handle the side thrust loads. Safe working loads and maximum line diameter is clearly marked on the edge of the durable and UV resistant acetal sheave.

The head pin design comes from a page out of Lewmar’s racing book. The stainless steel pin swivels freely, but can be locked in one position with a grub screw locking mechanism similar to those found on racing blocks. Included shackles are 316 stainless steel for superior corrosion resistance.

It takes high quality materials, the knowledge of sailors and builders, and race proven design to produce a block of this caliber at a racer/cruiser price point.

Key Features

  • Reliable, quality block designed for racer/cruiser applications
  • Engineered for high loads and reduced diameter lines
  • Aluminum cheeks add strength and rigidity
  • Plain central bearing handles high loads with efficiency
  • Delrin® (acetal) ball bearings control side loads
  • Head pin design based on racing level blocks
  • Grub screw locking mechanism secures blocks in a fixed position
  • Acetal sheave features clearly labeled safe working load and maximum line diameter
  • Ideal for frequently adjusted loads
  • Compatible with 9/16" line
  • Ideal for:
    • Spinnaker sheets
    • Halyard tuning systems
    • Backstay systems
    • Mainsheet systems
    • Boom Vangs
    • Turning blocks

Selection Guide

Sheave DiameterCompatible LineHead Post DiameterHead PorstShackle Pin Diameter
50mm3/8" (10mm)3/8" (9.4mm)3/16" (5mm)
60mm1/2" (12mm)15/32" (11.9mm)1/4" (6mm)
72mm9/16" (14mm)21/32" (16.5mm)3/8" (9.8mm)
90mm5/8" (16mm)25/32" (19.8mm)25/64" (10mm)


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