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Coating Hardness & Inspection
Hand-Held Portable
Hardness Tester
The
Impressor by Barber-Coleman
A convenient tool for testing hardness of
aluminum, aluminum alloys,
copper, brass and other materials, including plastics and fiberglass.
- Aluminum
- Aluminum Alloys
- Soft Metals
- Plastics
- Fiberglass
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Introduction |
| Portable |
The
Impressor is a convenient tool for testing the hardness of aluminum,
aluminum alloys, copper, brass and other materials including plastics and
fiberglass. The instrument is designed for use on fabricated parts and
assemblies as well as on raw stock. |
| Easy to
Use |
No
experience required; can be used in any position and in any space that
will allow for the operator's hand. The hardness reading is instantly
indicated on the dial, which is divided into one hundred graduations. No
waiting, pre-loading or separate measurements. |
|
Lightweight |
The
impressor weighs only 1 lb. 2 oz. and comes complete with carrying case,
adjusting wrench and two spare indenter points, 2 lb. 8oz. |
|
Applications |
Three
Models
Available |
GYZJ 934-1
for soft metals such as aluminum and its alloys, brass, copper, and some
of the harder plastics and fiberglass. Approximate range 25 to 150 Brinell
(10 mm ball 500 kg load). This unit meets American Society for Testing and
Materials (ASTM) Standard D2583.
GYZJ 935 for the softer plastics and very soft metals.
GYZJ 936 for extremely soft materials such as lead, linoleum and
leather.
Corrosion Control Products Company will be
glad to recommend the most suitable model upon receipt of sample
materials. |
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Operating
Information |
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The Impressor
is best suited for testing homogeneous materials. Materials of granular,
fibrous or coarse structure will produce a wide variation in hardness
readings because of the small diameter of the indenter point.
For accurate readings, material should be
at least 1 /32"thick and large enough for a minimum distance of
1/8" in any direction from the indenter point to the edge of the
specimen. The testing area should be smooth and free from mechanical
damage.
Simply exert alight pressure against the
instrument to drive the spring-loaded indenter point into the material.
The indenter point must be perpendicular to the surface being tested.
On very soft metals, the highest reading
should be used since cold flow permits the spring loaded indenter point to
continue penetration.
Note: Physical characteristics of very soft
materials are such that uniform correlation between different hardness
measuring systems cannot be established. For this reason, no conversion
curves are offered for the 935 and 936 models. We recommend that Impressor
hardness limits for each material be established by test. |
Recommended Sample Sizes
|
Material | Hardness
Scale | Reading
Variance | Number
of Readings | Variance
of Average
| |
Homogeneous
Material | 20
30
40
50
60
70
80 | 2.47
2.20
1.93
1.66
1.39
1.12
0.85 | 9
8
7
6
5
4
3 | 0.27
0.28
0.27
0.28
0.28
0.28
0.28
| |
Reinforced
Plastics | 30
40
50
60
70 | 22.4
17.2
12.0
7.8
3.6 | 29
22
16
10
5 | 0.77
0.78
0.75
0.78
0.75
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Ordering
Information
|
Hardness Tester
Schedule SF |
Model
GYZJ-934-1
GYZJ-935
GYZJ-936 |
Range
25 to 50 Brinell (10 mm ball, 500 kg load)
For softer plastic and very soft metals
For extremely soft material
| |
Certified Test Disks
Schedule: Y |
Part No.
GYZJ-069-100
GYZJ-070-100
GYZJ-078-100
GYZJ-250-100 |
Set of 5
Set of 5
Set of 5
Set of 5
|
Use
with Model
GYZJ-935
GYZJ-936
GYZJ-934-1
GYZJ-934-1 |
Barber-Colman
87-89
48-50
43-48
87/89
| |
Non-certified Test Disks |
GYZJ-069
GYZJ-070
GYZJ-078
GYZJ-250 |
Each
Each
Each
Each |
GYZJ-935
GYZJ-936
GYZJ-934-1
GYZJ-934-1 |
87-89
48-50
43-48
87/89
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Impressor
Repair Parts
| Item | GYZJ-934-1 | GYZJ-035 | GYZJ-936 | Description |
Qty
| | I |
AYRS-62 |
AYRS-62 |
AYRS-62 |
Spring |
| | 2 |
BYRF-3114 |
BYRF-3114 |
BYRF-3114 |
Cover Screw | 2
| | 3 |
BYRF-250 |
BYRF-250 |
BYRF-250 |
Frame Screw | 1
| | 4 |
GYZJ-2 |
GYZJ-2 |
GYZJ-2 |
Plunger Upper Guide Nut | 1
| | 5 |
GYZJ-3 |
AYRS-146-1 |
AYRS-146-1 |
Spring | 1
| | 6 |
GYZJ-4-1 |
GYZJ-4-1 |
GYZJ-4-1 |
Plunger | 1
| | 7 |
GYZJ-6-5 |
GYZJ-6-5 |
GYZJ-67 |
Indenter
Point | 1
| | 8 |
GYZJ-7 |
GYZJ-7 |
GYZJ-7 |
Lever | 1
| | 9 |
GYZJ-8 |
GYZJ-8 |
GYZJ-8 |
Pin | 1
| | 10 |
DYRA-218 |
DYRA-218 |
DYRA-218 |
Pin | 1
| | 11 |
GYZJ-1 5-2 |
GYZJ-1 5-2 |
GYZJ-15-2 |
Indicator (not field
servicable) | 1
| | 12 |
GYZJ-1 6 |
GYZJ-1 6 |
GYZJ-16 |
Lock Nut | 1
| | - |
GYZJ-1 7-1 |
GYZJ-1 7-1 |
GYZJ-17-1 |
Wrench | 1
| | - |
GYZJ-1 9-2 |
GYZJ-19-2 |
GYZJ-19-2 |
Carrying Case | 1
| | 13 |
GYZJ-23-1 |
GYZJ-23-1 |
GYZJ-23-1 |
Case & Frame Assembly | I
| | - |
GYZJ-250* |
GYZJ-69*** |
GYZJ-70~* |
Test
Disc | 1
| | - |
GYZJ-78** |
None |
None |
Test
Disc | 1
| | 14 |
GYZJ-61 |
GYZJ-61 |
GYZJ-61 |
Stop Ring | 1
| | 15 |
GYZJ-62 |
GYZJ-62 |
GYZJ-62 |
PointSleeve | 1
| | 16 |
GYZJ-63 |
GYZJ-63 |
GYZJ-63 |
Spring
Sleeve | 1
| | 17 |
GYZJ-64 |
GY7,J-64 |
GYZJ-71 |
Lower
plunger guide | 1
| | 18 |
GYZJ-65 |
GY7,J-66 |
GYZJ-65 |
Leg | 1
| | 19 |
GYZJ-79-1 |
GY7,J-79-2 |
GYZJ-79-3 |
Label |
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