In case of 'RASN' series machines for Rockwell & Rockwell superficial tests a preliminary test force in first applied and then indicator is automatically set for zero. Quickly thereafter an additional test force is applied without removing the preliminary test force. When the penetration is stabilised, the additional test force is removed and the hardness number is shown directly on the indicator.

Rockwell & Rockwell Superficial tests consists of forcing an indentor (Diamond or Ball) into the surface of a test piece in two steps i.e. first with preliminary test force and thereafter with additional test force and then measuring depth of indentation after removal of additional test force (Remaining preliminary test force active) for measurement of hardness value.

Brinell test consists of forcing a hardened ball into surface of a test piece with a specified test-force and measuring the diameter of indentation for evaluation of Brinell hardness number.

ARUN Hardness Testers, Model RAS, RAB-1, RAB-250, TWIN are manually operated. All these models are suitable for testing hardness of metals sand alloys of all kinds hard or soft, whether flat, round, or irregular shape. These testers are simple in design and easy to operate, yet sensitive & accurate. Various models from the wide range are suitable for schools, laboratories, tool-rooms, inspection, heat treatment departments, factories etc.These testers strictly confirms to IS : 1586-2000, ASTM : E 18 for Rockwell Superficial Test and IS : 2281 -2005, ASTM : E 10 for Brinell test.

MODEL - AI- RAS

Automatic load selection with automatic zero setting dial guage. Manual operation.

ARUN Portable Rockwell Hardness Tester is developed to meet the demands of a light weight instrument which can be used to carry out tests by a universally recognized method of Hardness testing.

Rockwell Method :

This hardness tester can be used in variety of applications and is readialy adjustable to a wide range of sizes and shapes which are difficult to test in a standard table model hardness tester.
The machine is designed for carrying out Rockwell tests comparable to table model hardness tester because, the basic things, such as shape of penetrator, method of penetration measurement and loads are same in both systems.
The photograph on the back side gives the general arrangement of the hardness tester.
The system carries a weight bar (8) pivoted at central point. When the load is applied by the loading screw (9), at one end of this weigh bar, it deflected and the other end of this bar carrying penetrator forces down into the test specimen.
This deflection of weight bar which is proportional to the applied load is indicated on the loading dial indicator (1). Besides this loading dial indicator, there is one penetration measuring indicator (14) which measures the actual penetration of the penterator into the

test specimen is read directly on this indicator.

The frame carries two adjusting screws and gear train. By rotating the knurled knob the distance between the penetrator and the support-anvil can be adjusted.

1) Upper Camp
2) Lower Clamp
3) Support Anvil
4) Adjusting Screws
5) Knurled Knob
6)Penetrator
7)Penetrator tightening screw
8) Weight Bar
9) Loading Screw
10) Handle
11) Loading Dial Indicator
12) Indocator Seat Support
13) Indicator Seat
14) Penetration measuring indicator

Method of Test :

1) Select proper penetrator (6) depending upon the material to be tested.
2) Take precaution so thet the penetrator does not project beyond the Upper clamp (1). For this, the loading screw (9) should be sufficiently taken back.
3) Place the test specimen securely on suitable anvil (3).
4) Clamp test specimen firmly between upper clamp (1) and support anvil (3) by rotating the knurled knob (5) on the lower clamp (2).
DO NOT APPLY EXTRAPRESSURE.
5) CHECK ZERO SETTING LOAD INDICATOR (11). Rotate bezel to bring pointer over small black dot for zero load.
6) Apply 10 kgf (98.07 N). major load by rotating the load screw (9) in clockwise direction such that the pointer on the load indentor (11) comes on set position.
7) Check zero setting of penetrator indicator (14). Rotate bezel to bring pointer to O on the black scale.
8) For C scale use diamond penetrator against load of 150 kgf (1471 N) and for Ascale use same diamond penetrator against a load of 60 kgf (588.4 N).
For B scale use 1/16 ball penetrator against a load of 100 kgf (980.7 N).
9) Take off major load by turning the loading screw in anticlockwise direction, such thatonly minor load of 10 kgf. (98.07) remains in action
(pointer back to set position).
10) Hardness value in Rockwell scale is directly indicated on the penetrator indicator(14).
Read of number on black scale is diamond penetrator.
Read off number on red scale is ball penetrator
11) Release load completely by taking back the loading screw (9).
12) Turn the knurled knob (5) in anticlockwise direction to loosen clamp and thusthe test speciman.

Maximum test height 110 mm
Throat capacity 55 mm

1) Flat Anvil 1 No.
2) V Anvil 1 No.
3) Test Blocks 2 Nos.
4) Diamond Penetrator 1 No.
5) 1/16 Ball penetrator 1 No.

ARUN Hardness Testers, Model RAS, RAB-1, RAB-250, TWIN are manually operated. All these models are suitable for testing hardness of metals sand alloys of all kinds hard or soft, whether flat, round, or irregular shape. These testers are simple in design and easy to operate, yet sensitive & accurate. Various models from the wide range are suitable for schools, laboratories, tool-rooms, inspection, heat treatment departments, factories etc.
These testers strictly confirms to IS : 1586-2000, ASTM : E 18 for Rockwell Superficial Test and IS : 2281 -2005, ASTM : E 10 for Brinell test.

Features :

Testing range is very wide, from softmetal such as lead, upto the hardest, like hardeness steel.

Same hardness number is obtained onthesame specimen, regardless of theload applied.

The indication is tiny and allows testing of a precision finished part.

Loading and unloading cycle is motorised.

Thin sheet metal is perfectly tested becausethe load applied is very small.

Built-in projection screen to get accurateresults.

Specifications :

ARUN Vickers Hardness Tester is a simple and accurate means to produce and measure the diamond indentation.

These testers are suitable for measuring the hardness of precision metallic parts with wide testing range from soft to hard and their accurate results are widely acclaimed. These testers strictly conform to IS : 1754 and ISO 6507-2.

In case of 'RASN' series machines for Rockwell & Rockwell superficial tests a preliminary test force in first applied and then indicator is automatically set for zero. Quickly thereafter an additional test force is applied without removing the preliminary test force. When the penetration is stabilised, the additional test force is removed and the hardness number is shown directly on the indicator.

Rockwell & Rockwell Superficial tests consists of forcing an indentor (Diamond or Ball) into the surface of a test piece in two steps i.e. first with preliminary test force and thereafter with additional test force and then measuring depth of indentation after removal of additional test force (Remaining preliminary test force active) for measurement of hardness value.

Brinell test consists of forcing a hardened ball into surface of a test piece with a specified test-force and measuring the diameter of indentation for evaluation of Brinell hardness number.

ARUN Hardness Testers, Model RAS, RAB-1, RAB-250, TWIN are manually operated. All these models are suitable for testing hardness of metals sand alloys of all kinds hard or soft, whether flat, round, or irregular shape. These testers are simple in design and easy to operate, yet sensitive & accurate. Various models from the wide range are suitable for schools, laboratories, tool-rooms, inspection, heat treatment departments, factories etc.These testers strictly confirms to IS : 1586-2000, ASTM : E 18 for Rockwell Superficial Test and IS : 2281 -2005, ASTM : E 10 for Brinell test.

MODEL - AI- RAS

Automatic load selection with automatic zero setting dial guage. Manual operation.

ARUN Portable Rockwell Hardness Tester is developed to meet the demands of a light weight instrument which can be used to carry out tests by a universally recognized method of Hardness testing.

Rockwell Method :

This hardness tester can be used in variety of applications and is readialy adjustable to a wide range of sizes and shapes which are difficult to test in a standard table model hardness tester.
The machine is designed for carrying out Rockwell tests comparable to table model hardness tester because, the basic things, such as shape of penetrator, method of penetration measurement and loads are same in both systems.
The photograph on the back side gives the general arrangement of the hardness tester.
The system carries a weight bar (8) pivoted at central point. When the load is applied by the loading screw (9), at one end of this weigh bar, it deflected and the other end of this bar carrying penetrator forces down into the test specimen.
This deflection of weight bar which is proportional to the applied load is indicated on the loading dial indicator (1). Besides this loading dial indicator, there is one penetration measuring indicator (14) which measures the actual penetration of the penterator into the

test specimen is read directly on this indicator.

The frame carries two adjusting screws and gear train. By rotating the knurled knob the distance between the penetrator and the support-anvil can be adjusted.

1) Upper Camp
2) Lower Clamp
3) Support Anvil
4) Adjusting Screws
5) Knurled Knob
6)Penetrator
7)Penetrator tightening screw
8) Weight Bar
9) Loading Screw
10) Handle
11) Loading Dial Indicator
12) Indocator Seat Support
13) Indicator Seat
14) Penetration measuring indicator

Method of Test :

1) Select proper penetrator (6) depending upon the material to be tested.
2) Take precaution so thet the penetrator does not project beyond the Upper clamp (1). For this, the loading screw (9) should be sufficiently taken back.
3) Place the test specimen securely on suitable anvil (3).
4) Clamp test specimen firmly between upper clamp (1) and support anvil (3) by rotating the knurled knob (5) on the lower clamp (2).
DO NOT APPLY EXTRAPRESSURE.
5) CHECK ZERO SETTING LOAD INDICATOR (11). Rotate bezel to bring pointer over small black dot for zero load.
6) Apply 10 kgf (98.07 N). major load by rotating the load screw (9) in clockwise direction such that the pointer on the load indentor (11) comes on set position.
7) Check zero setting of penetrator indicator (14). Rotate bezel to bring pointer to O on the black scale.
8) For C scale use diamond penetrator against load of 150 kgf (1471 N) and for Ascale use same diamond penetrator against a load of 60 kgf (588.4 N).
For B scale use 1/16 ball penetrator against a load of 100 kgf (980.7 N).
9) Take off major load by turning the loading screw in anticlockwise direction, such thatonly minor load of 10 kgf. (98.07) remains in action
(pointer back to set position).
10) Hardness value in Rockwell scale is directly indicated on the penetrator indicator(14).
Read of number on black scale is diamond penetrator.
Read off number on red scale is ball penetrator
11) Release load completely by taking back the loading screw (9).
12) Turn the knurled knob (5) in anticlockwise direction to loosen clamp and thusthe test speciman.

Maximum test height 110 mm
Throat capacity 55 mm

1) Flat Anvil 1 No.
2) V Anvil 1 No.
3) Test Blocks 2 Nos.
4) Diamond Penetrator 1 No.
5) 1/16 Ball penetrator 1 No.

ARUN Hardness Testers, Model RAS, RAB-1, RAB-250, TWIN are manually operated. All these models are suitable for testing hardness of metals sand alloys of all kinds hard or soft, whether flat, round, or irregular shape. These testers are simple in design and easy to operate, yet sensitive & accurate. Various models from the wide range are suitable for schools, laboratories, tool-rooms, inspection, heat treatment departments, factories etc.
These testers strictly confirms to IS : 1586-2000, ASTM : E 18 for Rockwell Superficial Test and IS : 2281 -2005, ASTM : E 10 for Brinell test.

Features :

Testing range is very wide, from softmetal such as lead, upto the hardest, like hardeness steel.

Same hardness number is obtained onthesame specimen, regardless of theload applied.

The indication is tiny and allows testing of a precision finished part.

Loading and unloading cycle is motorised.

Thin sheet metal is perfectly tested becausethe load applied is very small.

Built-in projection screen to get accurateresults.

Specifications :

ARUN Vickers Hardness Tester is a simple and accurate means to produce and measure the diamond indentation.

These testers are suitable for measuring the hardness of precision metallic parts with wide testing range from soft to hard and their accurate results are widely acclaimed. These testers strictly conform to IS : 1754 and ISO 6507-2.