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Home  >>  Products  >>  Adhesion  >>  Hoffman Scratch Hardness Tester
Hoffman Scratch Hardness Tester

GE Aircarft Engine Group Spec. E50TF61-S1; Naval Lab Spec. WS12858 Part 4.5.5 Hardness



Balanced Beam



Scrape Adhesion Test

The Hoffman Scratch Hardness Tester was developed for the comparative evaluation of scratch resistance and adhesion of many types of coatings.




FEATURES TECHNICAL DATA PROCEDURE PRICE LIST
 

 

Features

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This instrument consists of a four-wheeled carriage, a scale arm graduated from 0-20 that is attached permanently to the carriage in a counterpoised condition about the pivot axis, and a scratch tool with a sharp circular rim mounted at 45° to the flat test surface.

  • Simple pocket size tester
  • Ideal for field use and demonstrations

 

Technical Data

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Technical Data
Dimensions: 11 x 1.5 x 1 in (28 x 3.8 x 2.5 cm)
Net Weight: 1.5 lbs (0.7 kg)
Shipping Weight: 4 lbs (1.8 kg)



Procedure

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To operate, attach riders to the scale arm at the numbered positions. The carriage is held down firmly by hand and moved in the opposite direction, to cause a trailing scratch. The large standard rider loads 100 g per division, while the small rider loads 25 g per division. This small rider may be used for making low-range measurements involving small increments of pressure, or it may serve as a vernier with the large rider in making more precise medium-range measurements.

  • Scratch Hardness The force necessary to cut through the film to the substrate.
  • Adhesion The force required to scrape a path through the film, when the stylus begins its motion on an uncoated portion of the panel.

 

Prices

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Prices subject to change    Prices listed in US dollars for domestic shipments within US, Canada, & Mexico only    Export orders require quotations - click here for a quote     For more info call us 1-800-762-2478 or 954-946-9454.
Item Number Item Prices

One large standard rider, One small rider and one extra scratching tool, Carrying case, and Operating instructions
PA-1610 Hoffman Scratch Tester $1,181.00
Accessories
PA-1611 Scratching Tool Replacement 131.00
PA-1612 Large Rider 100g Equipped with friction clip for extending upper range of the Hoffman Scratch Hardness Tester 135.00
PA-1613 Small Rider 25g Equipped with friction clip for improving precision in all ranges of the Hoffman Scratch Hardness Tester 116.00



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