Grind Gages

Grind Gages & Physical Test Equipment

Precision Gage & Tool Co. manufactures high-accuracy Fineness of Grind Gages (sometimes referred to as Hegman Style Gages) and testing instruments for a large variety of industries. The Fineness of Grind Gages were originally developed in the early 1930’s for the paint industry by Bernard Hegman of Lowe Brothers Paint and Precision Gage & Tool Co. The two collaborating companies were located within two blocks of each other on East Third Street in Dayton Ohio.

The ASTM D1210 test method is the main ASTM method for Hegman style grind gage. It is referenced in the test procedures of many manufacturers. The paint industries success with using the grind gage to determine that solids are dispersed in a vehicle quickly was noticed by other industries.

The gages were adapted by Precision Gage & Tool Co. for use in the ink (ASTM D1316) and other coatings industries. Other industries such as the food, cosmetic, pharmaceutical, Nano material, adhesive, petroleum, battery and other slurry products now also use the Fineness of Grind Gages in many areas of manufacturing from QC and R&D applications to on the floor and in process testing.

Precision Gage & Tool also offers a variety of other physical test equipment items that include but are not limited to Wet Film Applicators and Cross-Cut Adhesion Test Kits. For a more extensive product listing download our Grind Gage Catalog or contact us.

Follow this link for a basic grind gage chart showing the specifications and a description of the typical application for each grind gage category.

The grind gage is an easy to use, relatively inexpensive production and quality control instrument that enables the manufacturer to check for unwanted agglomerates as well as particles that are too large. Grind gages and scrapers are consumable products and need to be refinished or replaced when they show visible damage to the gaging surface or readings become suspect. Long form certification is available at an additional cost for grind gages and scrapers.

Since 1932 thousands of custom gages have been created by Precision Gage & Tool Co for customers in various industries. Please Contact PG&T and we will be glad to assist you in deciding if one of our standard gages may work for you or if you would be better served by using one of our custom fineness of grind gage.

On Fineness of Grind Gages, wedge plates and printing plates common scales could include Hegman, micron, mils and NPIRI. Older gages could have the P.C. scale or the N.S. scale (In 1968 PG&T changed N.S. to H for Hegman).

Easy-to-use, accurate Precision Wet Film Applicators lay down a uniform thickness of film for observation and testing. Their reliability has made them a standard used in manufacturing, experimental and quality control situations. Applicators are available in a variety of styles. 2-path “U” shaped chrome plated steel models are available in 2" through 10" path widths. 2-path Bar Style hardened 440-C stainless steel applicators may be ordered in 2" through 14" path widths. 8-path film applicators in 2" through 4" path widths are made of hardened 440-C stainless steel and are in standard depths. Custom depth range 8 path applicators can be ordered at an additional cost. To order these applicators you need to specify the applicator style, film width and actual path depth and if certification is required.

Other applicators such as 1” Cube applicators and the Dow Latex Film Caster are also available. Many custom Applicators have been created by Precision Gage & Tool Co. for customers in various industries. Please Contact PG&T and we will be glad to assist you in deciding if one of our standard applicators may work for you or if you would be better served by using one of our custom applicators. Long form certification is available at an additional cost for these types of applicators.

The Bird Style applicators are drastically different from other applicators. They are marked with 1/2 the actual path depth (gap clearance) and this is often confusing to people. That bird style applicators are marked with 1/2 the actual path depth (gap clearance) is an idea that 1/2 the actual path depth (gap clearance) would be the approximate wet film thickness resulting from the drawdown. This is not the case with many products. Wet film thickness can vary drastically depending on the rheology of the product being tested and also be affected by other variables please refer to (ASTM D823) for more information on this subject.

Each Bird Style applicator comes with a long form certification for trace-ability at no additional cost. Bird Style applicators are machined from 440-C stainless steel and hardened.

To order Bird Style Applicators please specifying the film width and bird style path depth which is 1/2 the actual path depth (gap clearance). An example would be that a .003” Bird Style Applicator will have an actual Depth of .006”. To purchase a .003” (3 Mils) bird style bar with a 6” film width you would order it using that description. The actual depth of the path would be .006” (6 Mils) and we would not need the actual depth information.

Custom Bird Style Applicators are also available with two or three steps in the path.

Wedge printing plates are used for quick and easy proof press testing of stocks and inks. (ASTM D6846) They are especially effective in the routine production of standard prints having controlled ink film thickness. Stock ink combinations can be tested for print quality, as well as other performance properties. Impression plates are also available. Long form certification is available at an additional cost for wedge plates and printing plates.

Vacuum Plates hold charts in place for proper draw-down. The PG&T vacuum plate features a 304 stainless steel top, tool steel base. The 300 series stainless steel top Vacuum Plate Gage measures 9" x 12". Each Vacuum Plate comes with a long form certification for trace-ability at no additional cost.

The Cross-Cut Adhesion Testers Kit measures adhesion in accordance with ASTM Test Method D3359. The Cross-Cut Kit includes blade, blade holder/handle, hex wrench for changing blades, extra clamp screw, flaking and cleaning brush, 51596 test tape and lighted magnifier, in a finished wooden case. PG&T also sells replacement cross cut blades and in addition rolls of 51596 Test Tape.

The Sealant Slump Flow Test Jig is used to test the slump of a sealant in accordance with ASTM Test Method D2202. Both inch and SI unit scales are on the face of PG&T’s Sealant Slump Flow Test Jig. Scales on face of the PG&T Sealant Slump Flow Test Jig are in .1” (1/10) of an inch increments for a total of 4 inches and 2.5 mm increments (.098425”) for total length 100 mm (SI).

Sag Meters (ASTM D4400), Leslie Applicator Bars and NYPC Leveling Test Blade (LT1) (ASTM D2801 withdrawn) are multi notch applicators used for evaluating sag or leveling of paint or other coating. Sag Meters come standard in a High Range (14-60 mils), Medium Range (4-24 mils), Low Range (1-6 mils) and Standard Range (3-12 mils). Custom range Sag Meters and Multi Notched Wet Film Applicators are available at an additional cost. Please Contact PG&T and we will be glad to assist you in deciding if one of our standard Sag Meters and Multi Notched Wet Film Applicators may work for you or if you would be better served by using one of our custom Sag Meters or Multi Notched Wet Film Applicators. Long form certification is available at an additional cost.