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  • Martin AK21 P/B Plain Bore FHP Sheave, 3L/4L Belt Section, 1 Groove, 1/2" Bore, Class 30 Gray Cast Iron, 2.1" OD, 11814 max rpm, 1.56" Pitch Diameter/1.9 Datum
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by Martin

Martin AK21 P/B Plain Bore FHP Sheave, 3L/4L Belt Section, 1 Groove, 1/2" Bore, Class 30 Gray Cast Iron, 2.1" OD, 11814 max rpm, 1.56" Pitch Diameter/1.9 Datum


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Specifications for this item
Brand Name Martin
Part Number AK21 P/B
UPC 697950224282
Material Type Cast Iron
System of Measurement Inch
Cross Section 3L/4L
Bore Diameter 0.50  inches
Outside Diameter 2.1  inches
Pitch 1.56  inches
Bore Diameter Tolerance + .001 - .000  inches
EAN 0697950224282
Grade Class 30
Max Rotational Speed 11814  RPM
Number of Items 1
Outside Diameter Tolerance +/- .020  inches
Overall Length 15/16  inches
Size 11814 max rpm
Style Name 1.56" Pitch Diameter/1.9 Datum
UNSPSC Code 24101613

This Martin P/B plain bore FHP sheave with a 3L/4L or A belt section is mad... Read full product description



Product Features

  • Classical V-belt sheave fits widely available, classical profile V-belts suitable for use in many existing drive designs
  • Class 30 gray cast iron for resistance to wear and galling
  • 3L/4L or A belt or cross section
  • One groove for single belt use


Product Details


Product Description

This Martin P/B plain bore FHP sheave with a 3L/4L or A belt section is made of 30 gray cast iron and comes with one groove. It is a classical V-belt sheave that fits a variety of widely available, classical profile V-belts suitable for use in many existing power transmission drives. This pulley is made of class 30 gray cast iron for resistance to wear, corrosion, and galling. It has a 3L/4L or A cross section and one groove for use with multiple or banded belts. V-belt pulleys (sheaves) are used in a wide range of mechanical and electronic drives, including HVAC units, farm machinery, food processing equipment, and home appliances, among others.

V-belt pulleys (sheaves) are the component in a power transmission drive that transmits power to the belt. Typically made of cast iron, the pulleys and the V-belts that loop around them match in form – wide (classical) or narrow, single or multi-grooved. V-belt pulleys are found in drive designs in the agriculture, textile, printing, mining, and office equipment industries.

Martin Sprocket & Gear manufactures power transmission and conveying products. The company, founded in 1951 and headquartered in Arlington, TX, provides tools that meet American National Standards Institute (ANSI), National Aerospace Standard (NAS), and Deutsches Institut für Normung (DIN) standards.


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