GENEQ > Materials testing > Harrdness Testers

Barcol Impressor Hardness Tester
 


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 Ib. 8oz.

APPLICATIONS
  • Aluminum
  • Aluminum Alloys
  • Soft Metals
  • Plastics
  • Fiberglass

APPLICATIONS
Four 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 BrineIl (10 mm ball 500 kg load). This unit meets American Society for Testing and Materials (ASTM) Standard D-2583.
  • GYZJ 934-1-0-1 for ladder testing. Compliant with NFPA 1932, National Fire Protection Association – 1994 Edition; ASTM B648-76, American Society for Testing and Materials – 1984 edition.
  • GYZJ 935 for the softer plastics and very soft metals.
  • GYZJ 936 for extremely soft materials such as lead, linoleum and leather.

OPERATING INFORMATION

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 a light 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 springloaded 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.

SPECIFICATIONS
Hardness Scale
Reading Variance
Number of Readings
Variance of Average
Homogeneous Material
20
2.47
9
0.27
30
2.20
8
0.28
40
1.93
7
0.27
50
1.66
6
0.28
60
1.39
5
0.28
70
1.12
4
0.28
80
0.85
3
0.28
Reinforced Plastics
30
22.4
29
0.77
40
17.2
22
0.78
50
12.0
16
0.75
60
7.8
10
0.78
70
3.6
5
0.75

TYPICAL READINGS OF ALUMINUM ALLOYS
Alloy and Temper
GYZJ 934-1 reading
1100-0
35
3003-0
42
3003H14
56
2024-0
60
5052-0
62
5052H14
75
6061T6
80
2024T3
85

Hardness Tester
CAT NO DESCRIPTION
Hardness Tester
GYZJ-934-1 25 to 50 Brinell (10 mm ball 500 kg load)
GYZJ-934-1-0-1 For ladder testing (NFTA and ASTM compliant)
GYZJ-935 For softer plastic and very soft metals
GYZJ-936 For extremely soft material
Certified Test Disks
GYZJ-069-100 Set of 5, use with model GYZJ-935. Barber-Colman Scale: 87 – 89
GYZJ-070-100 Set of 5, use with model GYZJ-936. Barber-Colman Scale: 48 – 50
GYZJ-078-100 Set of 5, use with model GYZJ-934-1. Barber-Colman Scale: 43 – 48
GYZJ-250-100 Set of 5, use with model GYZJ-934-1. Barber-Colman Scale: 87/89
Non-certified Test Disks
GYZJ-069 Each, use with model GYZJ-935. Barber-Colman Scale: 87 – 89
GYZJ-070 Each, use with model GYZJ-936. Barber-Colman Scale: 48 – 50
GYZJ-078 Each, use with model GYZJ-934-1. Barber-Colman Scale: 43 – 48
GYZJ-250Each, use with model GYZJ-934-1. Barber-Colman Scale: 87/89

Replacement parts