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The Barcol Impressor

A Hand-Held Portable Hardness Tester, Models GYZJ934-1, GYZJ935, GYZJ936

Meets ASTM D2583; MIL-P-17549-C (SHIPS)

Barcol Impressor

Applications
  • Fiberglass
  • Aluminum
  • Aluminum Alloys
  • Soft Metals
  • Plastics
 
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.

MADE IN THE U.S.A.


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, preloading or separate measurements.

Lightweight
The Impressor weighs only 1 lb. 2 oz. and comes complete with carrying case, adjusting wrench and two spare indenters.

Technical Data
Three Models Available
GYZJ 934-1 Use this model for fiberglass, soft metals such as aluminum and its alloys, brass, copper, and some of the harder plastics and fiberglass. Approximated range 25 to 150 Brinell (10mm ball 500 KG load). This unit meets American Society for Testing and Material (ASTM) Standard D-2583.
GYZJ 935 Use this Model for the softer plastics and very soft metals. Approximate range 50 to 110 Rockwell "R".
GYZJ 936 Use this Model for extremely soft materials such as lead, linoleum and leather.

Testing Instructions

The Impressor is best suited for testing homogeneous materials. Material 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 into the material. The indenter must be perpendicular to the surface being tested. On very soft metal, the highest reading should be used since cold flow permits the spring-loaded indenter 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.

Approximate Conversion Curves for GYZJ934-1

Approximate Conversion Curves for GYZJ-935 & GYZJ-936


Approximate Conversion Chart for GYZJ934-1
GYZJ-934-1 Brinell Vickers Webster Rockwell Rockwell Rockwell Rockwell
10mm 500kg 5kg Model B B E F H
35   21         32
36 22   35
37 23   37
38 24   40
39 25   42
40 25 26   45
41 26 27   47
42 26 28   49
43 27 29   51
44 27 30   54
45 27 30   56
46 28 31   58
47 29 32   23 60
48 30 33 0.7 26 62
49 31 34 1.3 28 64
50 32 35 1.9 31 66
51 33 36 2.5 34 68
52 34 38 3.1 38 70
53 35 39 3.6 39 30 72
54 37 40 4.2 41 34 73
55 38 41 4.7 44 37 75
56 39 43 5.3 46 40 77
57 40 44 5.8 48 43 78
58 42 45 6.3 50 46 80
59 44 47 6.8 53 48 82
60 45 49 7.3 55 51 83
61 47 50 7.6 57 54 85
62 48 52 8.3 59 56 86
63 50 54 8.8 61 59 88
64 52 56 9.2 63 61 89
65 54 58 9.7 65 63 90
66 55 60 10.1 67 66 92
67 58 62 10.8 69 68 93
68 60 65 11.0 71 70 94
69 62 67 11.4 73 72 95
70 64 70 11.8 17 75 74 97
71 67 72 12.2 23 76 75 98
72 69 75 12.6 28 78 77 99
73 71 78 12.9 33 80 79 100
74 73 81 13.3 38 81 80 101
75 76 85 13.7 42 83 82 102
76 80 88 14.0 47 84 83 103
77 84 92 14.3 51 86 85 104
78 87 95 14.7 55 87 86 105
79 90 99 15.0 59 88 88 106
80 94 103 15.3 63 90 89 106
81 97 108 15.6 66 91 90 107
82 100 112 15.9 70 92 91 108
83 105 117 16.2 73 94 92 109
84 109 121 16.4 76 95 93 109
85 113 126 16.7 79 96 94 110
86 117 131 16.9 81 97 95 111
87 122 137 17.2 84 98 96 111
88 126 142 17.4 86 99 97 112
89 131   17.6 88 100 98 112
90 135 17.8 90 101 98 113
91 139 18.0   102 99 114
92 145 18.2 103 100  
93   18.4 103 101
94 18.6 104 101
95 18.7 105 102
96 18.9 106 102
97 19.0 106 103
98 19.2 107  
99 19.3 107
100 19.4 108

Approximate Conversion Chart for GYZJ-935 & GYZJ-936
Type D Durometer GYZJ-935 GYZJ-936
52   6
53   9
54   12
55   15
56   18
57   21
58   24
59   27
60   30
61   32
62   35
63   38
64   40
65   43
66   45
67   48
68 22 50
69 28 52
70 30 54
71 34 57
72 38 59
73 41 61
74 45 63
75 48 65
76 51 67
77 54 69
78 57 70
79 60 72
80 63 74
81 68 76
82 69 77
83 71 79
84 74 80
85 78 82
86 79 83
87 81 85
88 83 88
89 85 87
90 87 88

Barcol Dimensions

Barcol Impressor
 
Barcol Case
  • Carrying case

  • 2 spare indenters

  • Adjusting wrench

  • 2 uncertified test discs

Available Items - Literature
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
 HA-GYZJ934-1 Barber-Coleman Impressor $801.00
 HA-GYZJ935 Barber-Coleman Impressor 801.00
 HA-GYZJ936 Barber-Coleman Impressor 917.00
Barcol Diagram
Key No. HA-GYZJ 934-1 HA-GYZJ 935 HA-GYZJ 936 Name No. Required Prices
1 AYRS 62 AYRS 62 AYRS 62 Spring 1 $29.00
2 BYRF 3114 BYRF 3114 BYRF 3114 Cover Screw 2 29.00
3 BYRF 250 BYRF 250 BYRF 250 Frame Screw 1 29.00
4 GYZJ 2 GYZJ 2 GYZJ 2 Plunger Upper Guide Nut 1 44.00
5 GYZJ 3 AYRS 146-1 AYRS 146-1 Spring † 1 44.00
6 GYZJ 4-1 GYZJ 4-1 GYZJ 4-1 Plunger 1 76.00
7 GYZJ 6-5 GYZJ 6-5 GYZJ 67 Indenter Point † 1 98.00
8 GYZJ 7 GYZJ 7 GYZJ 7 Lever 1 120.00
9 GYZJ 8 GYZJ 8 GYZJ 8 Pin 1 29.00
10 DYRA 218 DYRA 218 DYRA 218 Pin 1 10.00
11 GYZJ 15-3 GYZJ 15-3 GYZJ 15-3 Indicator (not field serviceable) 1 544.00
12 GYZJ 16 GYZJ 16 GYZJ 16 Lock Nut 1 29.00
-- GYZJ 17-1 GYZJ 17-1 GYZJ 17-1 Wrench 1 45.00
-- GYZJ 19-2 GYZJ 19-2 GYZJ 19-2 Carrying Case 1 193.00
13 GYZJ 23-1 GYZJ 23-1 GYZJ 23-1 Case & Frame Assembly 1 320.00
  GYZJ 2501 GYZJ 693 GYZJ 704 Test Disc 1 16.00
  GYZJ 782     Test Disc 1 16.00
  GYZJ 250-1001 GYZJ 69-1003 GYZJ 70-1004 Certified Test Disc Set of 5 413.00
  GYZJ 78-1002     Certified Test Disc Set of 5 413.00
14 GYZJ 61 GYZJ 61 GYZJ 61 Stop Ring 1 29.00
15 GYZJ 62 GYZJ 62 GYZJ 62 Point Sleeve 1 29.00
16 GYZJ 63 GYZJ 63 GYZJ 63 Spring Sleeve 1 29.00
17 GYZJ 64 GYZJ 64 GYZJ 71 Lower Plunger Guide † 1 264.00
18 GYZJ 65 GYZJ 65 GYZJ 65 Leg 1 129.00
18 GYZJ65-4 For Model GYZJ-934-1-0-1 only Leg 1 129.00
19 GYZJ 79-1 GYZJ 79-2 GYZJ 79-3 Label † 1 29.00
1 Marked "87/89" • 2 Marked "45-50" • 3 Marked "87-89" • 4 Marked "48-50" • † Parts required to convert between models
Home    Hardness    How To Order    Top Of Page Paul N. Gardner Company, Inc. • 1.800.762.2478 • Fax 954.946.9309