Rockwell Testing Aids

Shahdara, Delhi

Measuring Principle

Dynamic Hardness Tester is an extremely light weight, portable, fast & reliable hardness tester based on a novel, dynamic & Rapid test procedure with widest measuring ranges for metals.A carbide tipped shuttle with a definite kinetic energy is impacted on the specimen. A part of this energy absorbed by the specimen and is a function of the hardness of the specimen. A tubular device housing electrodynamic energy measuring device carries out the impacting of the shuttle. A measuring instrument receives the signal, equivalent to absorbed energy through a cable and displays with instant calculations. This displays Dynamic hardness (D) a three digit figure, which is proportional to the hardness of the specimen. The machine has built inconversion facility for given material to convert D value to Vickers, Rockwell, Brinell scales which can be selected by pressing keys.

ApplicationIn stores for Material identification.Measurement of Hardness in confined spaces.Variation in hardness over large work piece.Large & heavy components.Permanently installed parts.Surface hardened component or hardness on coatings.

Packers and Movers Hyderabad

Salient Features
Sleek and handy design, comes in a slim briefcase, for carrying the machine.
Alpha numeric display which indicates selected material & scale combination & hardness value.
Average key to select average of 2 to 10 readings.
Machine is having improved electronics with micro controller circuitry & user friendly software.
30 Hardness scales for different probes selectable by feather touch keys (PIs. ref. the table).
Auto detection of probe facility is given.
Automatic shut down facility is provided when machine is not in use for continously 10 minutes.
This model operates on 2 numbers of pencil cells.
Printing is possible with all types of ports i.e. Dot matrix (Centronic parallel port).
Up to 100 readings can be stored in memory of the machine for printing purpose
(This facility is useful when operating the machine at site).
Low test expenditure.
Five numbers of probes can be given in different combinations. For eg. *Dl, D2, G1, G2 & C
*Dl, D2, D3, D4 & D5 . *Dl, D2, G1, SH &C
Conversion of UTS facility is available on display by using side keys (). This is applicable for only BHN scale for the range 226 to 634 BHN (hard steel & hard alloys only).
Display last result (For eg. From Sr. No. 20 onward) facility is given by using upper arrow key()& down arrow key().Also we can scroll through stored readings.
The ON/OFF switch is provided with feather touch keyboard on front side.
In this model both serial & printer interfaces are available on single port (serial interface is an extra accessory).
Automatic calibration facility of probe is available through keyboard.
Serial interface is possible with RS 232.
Date entry & datewise printout facility is available.
We can recall the readings one by one by using arrow keys()()on display, in display result mode.


Optional Features

1. Different types of probes are available
Short (Suitable for checking hardness in holes, cylinders, etc.)
Extended (Suitable for checking hardness in grooves, & recesses)
Low Energy (Suitable for Surface Hardened Components, Coatings & Impact Sensitive Components)
Standard (Suitable for general application)
Heavy (Suitable for Castings & Forgings)
2. Special conversion scales can be offered to suit different material.
3. Machine can be connected to computer for data loading using our serial interface card which is an extra accessory.
Measuring Ranges
For Standard Probe (D) / Shot Probe (SH) / Extended Probe (EX) Scales( as follows )

DIMENSIONS

Digital Display Unit-188(L) X 105(W) X 64(H) mm


MEASURING ACCURACY
Average Measuring deviation +/-1% referred to D = 800 on 'D' scale standard test block at a particular test location.
OPERATING TEMPERATURE RANGE
0C to 50C

WEIGHT(Approx.)
Probe (standard) - 150 gms.display Unit - 325 gms.Standard Test block - 3000 gms.Total Weightof Machine- 7 kg.
(with all accessories & carry case)

POWER SUPPLY CONDITIONS

Model: DHT- 6- Dry cell batteries (1.5 VDC x 2 Nos.) Size - AA, Type R6.

STANDARD ACCESSORIES

Probe (Normally 'D', if specifiedother Probe can be supplied in place of D) - 1 NO.Digital display unit - 1 NO.Standard test block calibrated in D Scale - 1 NO.Brush for cleaning probe - 1 NO.Carry case for Machine - 1 NO.Instruction manual - 1 NO.Coupling Jelly- 50 gms
EXTRA (OPTIONAL) ACCESSORIES

> StandardTest Block of any hardness> Support rings Smaller radius for -

(SR 1) Convex, Concave, Cylindrical, Spherical radius 30 to 60 mm(SR 2) Convex cylindrical radius 14.5 to 30 mm(SR 3) Convex cylindrical radius 10 to 15 mm(SR 4) Concave cylindrical radius 16.5 to 30 mm(SR 5) Concave cylindrical radius 12.5 to 17 mm(SR 6) Concave cylindrical radius 11 to 13 mm.

> Serial Interface (Windows 98 Based).> 80 Col. Dot Matrix Printer.
> Different types of Probes -1. Standard(D)2. Short (SH)3. Extended (EX)
4. Heavy (G)5. Low Energy (C)

FEATURES:
The hammer type Poldi impact Hardness Tester is suitable for measuring the Brinell Hardness of Steel , Cast iron , Brass Aluminium. Copper etc. This Poldi Hardness Tester is useful to test parts where bench type model is not useful. This type of machine is most ideal and simple for foundries, Workshops , Engineering Colleges, Technical Institutions etc.

Load is applied by a hammer blow on the specimen and a standard test bar in linear direction through a hardened steel ball of 10 mm dia. The impact load on both is the same . The extent of indentation on the specimen and the test bar depends on their hardness. The two diameters of indentations on test bar and specimen are measured by a magnifier supplied alongwith the tester. The hardness of the specimen can be determined, by referring got the chart supplied with the machine.

TECHNICAL DATA:

Hardened Steel Ball:-10 mm dia , fixed in a special holderwith a spring loaded plunger.

Standard Test Bar:Each bar individually calibrated and Multiplying Factor marked thereon.

Magnifier:-Measuring range 10 mmScale graduation 0.1 mmMagnification 10xAccuracy of measurement 0.05 mm

Hardness Tables:-Comparison tables for finding hardness Separate Tables for Steel, Cast iron , BrassCopper and Aluminium.

Our hardness testers model MRS, MRS 150, MRB, MRB 250 and MSM are manually operated. These models are designed and developed after years of experience in this field. All the models are manufactured under strick quality control at all manufacturing stages.These models are suitable for testing hardness of metals and alloys of all kinds, hard or soft, whether flat or round etc. or of irregular shape. These Testers are simple in design and easy to operate, still yet quite sensitive and accurate.Various Models from the wide range are available for institutes, Quality Control Laboratories, Tool- Rooms, Heat Treatment Dept, R&D Laboratories, etc.These models strictly conform to IS : 1586-2000, BS :891part 1&2 for Rockwell & Rockwell Superficial Test. IS : 15862000, ASTM E 10 for Brinell Test.

Packers and Movers Hyderabad

Rockwell system

MRS : Automatic weight selection with automatic zero setting gauge.MRS- 150: Automatic weight selection with automatic zero setting dial gauge with moretesting height and throat

Rockwell Cum Brinell Combined System

MRB : Automatic weight selection witht automatic zero setting dial gauge.MRB-250: Arrangement similar to MRS with two additional weights of 187.5 kgfand 250 kgf for Brinell tests. On this machine small pin having Dia 2mm
can be tested as plunger is guided with a set of six bearings.

Rockwell cum Rockwell Superficial Combind

MSM : This hardness tester is similar to MRB-250 machine in construction, and with automatic weight selection. This is useful for carrying Rockwell and Rockwell superficial Tests. The Rockwell superficial method useful for checking hardness of very thin sheets and surface hardness.

Vickers Hardness Testers Model BV-250, BV-250-S, BV-120, BV -120 -S, BV -50, BV -50-S are suitable for Vickers and Brinell Hardness of steel and other metals. These machines are designed and manufactured for very high accuracy, reliability and ease of operation. The selection of load is effected with the push button control system. The measurements of diagonal / diameter of indentation is done with the help of built-in optical system with graduated readout with Micrometer. After taking indentation on the work piece, the objective lens is automatically swivelled into position and image of indentation appears on the focusing screen fitted in front of the machine. A push button is provided for starting the laoding cycle and unloading is accomplished through hand lever. This machine conforms to IS 1754 -2002 for Vickers and IS 2281 -2005, BS-240 for Brinell Test.

Vickers Hardness Testing Machine

BV-50 : Only for Vickers test load range 5 kgf to 50 kgfBV-5O-S : Only for Vickers test load range 1 kgf to 50 kgfBV-120 : Only for Vickers test load range 5 kgf to 120 kgfBV-120-S : Only for Vickers test load range 1 kgf to 120 kgf

Vickers cum Brinell hardness Testing Machine
BV -250 : For Vickers and Brinell Test load range 5 kgf to 250 kgfBV -250-S : For.Vickers and Brinell Test load range 1 kgf to 250 kgf

Salient features
1. Testing range is very wide, from soft metal such as lead up to the hardest, like hardened steel.2. Thin sheet metal is perfectly tested because the load applied is very small.3. Same hardness number is obtained on the some specimen, regardless of the load applied.4. Built in projection screen to get accurate results.