BLACKS CHARPY / IZOD CUTTING & PREPARATION MACHINES

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CNB35-001A1
Hand Operated Charpy Notch Machine
 

Method of operation:

The broach is mounted in a square section rack and secured at the top & bottom by clamps. Adjusting screws built into the machine body are set to obtain the correct depth of notch and its position along the specimen.

Once set, the adjusting screws provide repeatability for the next specimen. The broach can easily be removed, for re-sharpening or replaced to cut a different type of notch.

The CNB-35 Hand Operated Charpy Notch Broaching Machine is designed for test houses and laboratories, which are producing small batches of test pieces in carbon steels, easily machined low alloy steels, non-ferrous and plastic materials.

The machine is of robust construction designed to be mounted on a customers bench.

This hand Charpy machine will cut Charpy and Izod 'V' and 'U' notches in pre-machined standard 10mm square, sub-size and 0.45" diameter specimens.

Hand operation makes it ideal for small batch quantities.

BROACHES
Broaches are ordered separately.
More information here

The sample is secured in the machine by two clamp screws.

A light coating of cutting oil (RTD recommended) is applied to the broach & then the hand wheel is operated which draws the broach through the specimen to produce an accurate notch profile.

After the notch has been cut, the sample is removed, the broach raised and the broach teeth cleaned, ready for the next sample.

MACHINE SPECIFICATION

ACCESSORIES

Standard broaches
Special broaches
Multi-notch attachment
Sub-size spacers
Notch depth caliper go/no go gauges

Caliper Gauges

SPARES

Spare parts and consumables for all machines available.
Contact us, giving details of parts required.

 

  VIDEO
  CNB35 HAND OPERATED CHARPY NOTCH BROACHING MACHINE

 
The hand machine clamping device facilitates cutting of single notches in standard square, round and rectangular sub-size specimens.

The use of an optional multi-notch attachment allows cutting of multiple notches to be produced.

Once the adjusting screws have been set, a cycle time of 40 seconds per sample can be expected.

'V' and 'U' Notch Specimens

 

  VIDEO
  HAND BROACHING OPTIONS: 'U' Notch Specimens
 

Note:
Where larger batches are to be produced or for more difficult sample materials, the use of the Motorised Charpy Notch Machine is recommended, see CNB 31 or CNB 34.

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Charpy Notch Videos

Multi-notch attachment:
The standard front plate can be replaced by a special multi-notch attachment, which allows single and multiple notches to be produced in 10mm square and 0.45" diameter specimens.

 

  VIDEO
  HAND BROACHING OPTIONS: Multi Notch Specimens
 

Other attachments:
Special spacers are available for cutting notches in the following sub-size specimens:

CNB35-032A4 for 2.5mm SPECIMEN
CNB35-029A4 for 3.0mm & 3.3mm SPECIMEN
CNB35-030A4 for 4.0mm SPECIMEN
CNB35-033A4 for 5.0mm & 6.7mm SPECIMEN

(Note: No spacer is required for the 7.5mm specimen)

 

  VIDEO
  HAND BROACHING OPTIONS: Sub-Size Specimens
 

Broaches:
Broaches can be supplied for standard BS, ISO, EN, ASTM and other International Standard notch profiles. Due to the variety of broaches and notch configurations, broaches are ordered separately.

More information on our BROACH PAGE

Special notch profile broaches may be supplied to order, send details for consideration. For broach quotation, please specify:

Notch type
Depth of notch
Applicable Standard
Material specification/Hardness Rc

BLACKS CHARPY & IZOD notch machines - Hand-operated - Motorised - CNM Machine
Manufactured by RJW LTD
Unit A5, Chaucer Business Park, Watery Lane, Kemsing, Sevenoaks, Kent, TN15 6PW
Precision & Production Engineers