How much would your profit increase if you
could cut the cost of scraping valuable parts and the loss of many man hours?
Dennis Dawson Co. Soft Abrasive Grit makes for low cost modern cleaning!
How would you like a cleaning method that is essentially fool-proof -
involves no toxic liquids or flammable solvents and is four to ten times faster than older
methods?
How would you like to be able to clean a one million dollar jet engine,
airplane cylinder and pistons with no change in dimensions and no pitting action?
Competition forces the industry to seek better techniques over manual and
costly hand finishing methods.
Cleaning by soft grit blasting is particularly effective where the surface
of the metal under its coat of dirt, grease, scale, carbon, etc., should remain unchanged
or otherwise unimpaired.
Did you know that the time required to degrease and recondition electrical
equipment by this soft grit method is only one-fourth to one-third to that required by
older methods?
Did you know that pitted surfaces resulting from use of steel grit cause
early failure of subsequently applied paint films? Soft grits do not cause pitting.
Did you know that machine components cleaning by the soft grit method
requires no additional machining or fitting for re-use?
Are you a custom molder of plastic parts?
How long does your de-flashing take?
The soft grit method is a dry operation and long periods of drying are not
required before the equipment can be replaced in service. Surfaces are ready
immediately for painting or varnishing.
Is your problem de-scaling and/or rust removal?
How long does your de-burring take?
Did you know that soft grits provide a low cost method of cleaning metals
and are excellent media to be used in precision barrel finishing?
The soft grit method of cleaning not only eliminates the hazards
surrounding the older methods, but is considerably more economical in respect to time and
materials. Dennis Dawson Co. Grit is reusable and eliminates the health hazard of
Silicosis.
Greases, gums, waxes, asphalts or varnishes present in preservative cause
no difficulty of removal by the soft grit method.
What does it cost you to use the abrasive you have?
Does the abrasive you use have RESILIENCE?
Do poorly chosen cleaning methods cause you to scrap valuable parts?
The effectiveness of soft grits is the same regardless of the size of the
object to be cleaned. So make sure you get your money's worth and use an abrasive
product with RESILIENCE. The Superiority of Dennis Dawson Co. Soft Grit is proven by
the following data.
Dennis Dawson Co. Walnut Shell features a terrific modulus of elasticity
(giving greater durability thru and due to RESILIENCE at no extra cost.) Look at
these results of penetration tests to the right and you will see why we feature
RESILIENCE.
In these tests the Nozzle was held three inches from the panels and the
time, in seconds, required for penetration was considered the measure of cleaning
efficiency.
P.O. Box 4520
Ft. Worth, Tx 76164
Telephone (817) 860-9898
Fax (817) 274-1339
Telephone (800) 259-2761 (US only)
info@dennisdawson.com
Serving Industry World Wide For 35 Years
Visitors Since 2 August 99
|
Walnut Soft Abrasive Grit
It is a fact that in addition to a soft grit material being
strong, that is, resisting rupture, the material must also have a high modulus of
elasticity, that is, it should resist deformation. The durability and quality
characteristics of a walnut shell is proven by its ability to stand up and perform and is
further emphasized in the following chart showing various materials and their modulus of
elasticity in pounds per square inch.
| Material |
Modulus
Elas., p.s.i. |
| Walnut shells |
170,000 |
| Coconut Shells |
10,000 + |
| Peach Pits |
10,000 + |
| Brazil Nut Covers |
None |
| Cherry Pits |
10,000 + |
| Apricot Pits |
10,000 + |
| Plum Pits |
10,000 + |
| Olive Seeds |
10,000 + |
| Prune Seeds |
10,000 + |
| Grape Seeds |
None |
| Peanut Hulls |
None |
| Almond Shells |
10,000 + |
| Cotton Seed Hulls |
None |
| Acorn Shells |
10,000 + |
| Orange Seeds |
None |
| Grapefruit Seeds |
None |
| Lemon Seeds |
None |
| Watermelon Seeds |
None |
|
Resilience, is elasticity, (the capability of a strained body to recover its size and
shape after deformation).
After reviewing this chart it is easy for you to see why your abrasive should be Dennis
Dawson Co. Walnut Shell.
Your Resilience is FREE
In addition to the above facts, Dennis Dawson Co. Soft Abrasive Grit has the following
specifications:
- Specific gravity (to water) - 1.3 to 1.4
- Dust Free
- Gradation guaranteed to be within 5% of the stated size.
- Free of metal
- Oil and water resistant.
- For all practical purposes, chemically inert.
- Hardness (Moh's) - 3
Dennis Dawson Co. Soft Abrasive Grit meets military specifications MIL-G-5634A and all
quality requirements concerning same. Our grit is packaged in 50 pound multi-wall,
moisture proof paper sacks, available as required.
Dennis Dawson Co. Soft
Abrasive Grit Available in These Screen Sizes
 
Available Screen Sizes
6/10, 8/12, 12/20, 20/30, 20/40,
30/60, 35/60, 30/100, 40/60,
-60, -100, -200, -325
Results
of Tests on Various Soft Grits |
| Types of Grits |
Grits Only |
Grits Plus Rice Hulls |
| Hardshell Almond Shell |
9 |
7 |
| Softshell Almond Shell |
9 |
7 ½ |
| Apricot Pit Shell |
11½ |
7 ½ |
| *Cherry Pit Shell |
7 |
3 |
| Coconut Shell |
4 |
4 ½ |
Corncob, Commercial
As Received Screened 22
20
Air-Separated
22-35 10 |
| Peach Shell (Pit) |
5 ½ |
5 ½ |
| Walnut Shell |
4 |
1 |
|
* Grits from cherry pits, while very effective in cleaning by the
blasting method, are quite friable and disintegrate readily to a fine powder. |
