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Piercing 

 

Piercing is the process in which a quick hole is made in the workpiece. Piercing is often just a starting hole that will be used to make a 

 

circular cut within the workpiece. 

 

You can use standard cutting tips for piercing although ensure the plasma machines output amperage matches the cutting tips amperage 
rating. No accessories are required when piercing. 

 

The thickness of the material to be pierced will need to fall in the proper amperage range for the machine and tip you will be using. 

 

There are two different techniques for piercing depending on the thickness of the workpiece. If the work piece is less than 2mm sheet metal, 
the torch should be held at a 15°

-

30° angle with the cutting tip touching the workpiece. 

 

Begin by establishing the pilot arc, as soon as the pilot arc penetrates the workpiece, use a smooth, rolling motion to move the torch to a 90° 
(perpendicular) angle. At this point, the pierce has been created in the workpiece allowing you to begin the cutting process. If the material 
being cut is thicker than 2mm the torch should be held at a 90° (perpendicular) angle approximately 12mm or more above the workpiece. 
Begin by establishing the pilot arc and slowly move the torch towards the workpiece until the cutting arc transfers. 

 

Once the transfer has occurred, hold the torch still until the arc exits the bottom of the workpiece. 

 

Once the pierce has been made, the torch can be lowered to normal cutting height and the cutting process can begin. 

 

 
 

Bevelling 

 

Bevelling allows you to angle the edge of a flat plate or pipe to allow for deeper weld penetration. 

 

This process is normally used for materials that are 9mm or thicker. You can utilize standard cutting tips for bevelling, again you need to     
ensure you utilize the correct plasma machine amperage to match the cutting tips used. 

 

Ensure that the thickness of the material to be bevelled falls in the amperage range of the plasma machine and cutting tip that you will be 
using. If bevelling by hand, a roller and/or angle guide can be helpful in maintaining the consistent bevel face and the desired angle which is 
usually determined by the weld joint design. 

 

The industry standard angle ranges are from 15°

-

45°. The cutting tip would normally be between 

3

6

mm from the workpiece. 

 

 

 
 
 

Plasma Cutting Techniques 

 

Wilkinson Star Technical

 

Summary of Contents for Plasma Cut 45

Page 1: ...Jasic Cut 45 PT60 Plasma Hand Torch Manual Wilkinson Star Technical ...

Page 2: ...hing Also take the necessary steps to protect any persons within the cutting area Index Page Number Jasic Cut 45 with PT60 Plasma Torch Overview 3 PT60 Consumable Breakdowns 4 PT60 Torch Information 7 Machine torch option 8 Safety Information 9 General Plasma Cutting Information 10 Stand off Cutting 11 Drag Cutting 12 Piercing 13 Bevelling 13 Gouging 14 Cutting Tips and Techniques 15 Plasma Machin...

Page 3: ...lkinson Star Technical PT60 6m Pt No 09637 LG Torch Specifications PT60 12m Pt No 09639 LG Duty Cycle 60 Amps at 80 Gas Air Pressure Cutting 65 75 PSI 4 5 5 0 bar Gas Air Flow 360 SCFH 170 lpm Pilot Arc Ignition NON HF Jasic Plasma Cut 45 Circle Cutting Guide Kit part number 51866 ...

Page 4: ...ip 0 9 30 40A Back Striking 10 8 52583 Extended Electrode Back Striking 10 10 51314 09 Extended Tip Contact 0 9 30 40A Back Striking 10 11 51318L 06 Extended Tip Contact 0 65 10 20A Back Striking 10 11 51318L 08 Extended Tip Contact 0 8 20 30A Back Striking 10 12 51318C 09 Shielded Cutting Tip 0 9 30 40A Back Striking 10 12 51318C 10 Shielded Cutting Tip 1 0 40 50A Back Striking 10 14 60389 Retain...

Page 5: ...ip 1 0 40 50A Back Striking 10 7 51318 06 Contact Cutting Tip 0 65 10 20A Back Striking 10 7 51318 08 Contact Cutting Tip 0 8 20 30A Back Striking 10 7 51318 09 Contact Cutting Tip 0 9 30 40A Back Striking 10 10 51314 09 Extended Tip Contact 0 9 30 40A Back Striking 10 11 51318L 06 Extended Tip Contact 0 65 10 20A Back Striking 10 11 51318L 08 Extended Tip Contact 0 8 20 30A Back Striking 10 14 60...

Page 6: ...1A 5162060 Torch head O Ring 1 2 09605 Handle c w Switch 1 3 52582 Electrode Back Striking 5 4 60028 Gas Distributor 1 8 52583 Extended Electrode Back Striking 10 12 51318C 09 Shielded Cutting Tip 0 9 30 40A Back Striking 10 12 51318C 10 Shielded Cutting Tip 1 0 40 50A Back Striking 10 16 60389C Shield Cup Body 1 19 60485 Shield Cap Hand 1 21 60368 Wrench for electrode 1 ...

Page 7: ...could be as high as 350V DC at the torch head The torch head encompasses a full set of consumables as shown right these consumables are made up of a cooling tube torch electrode swirl ring for gas distribution cutting tip retaining cap and if required a stand off device to ensure the same distance between tip and material being cut Fitting the PT60 plasma torch On the Jasic Cut 45 plasma machine t...

Page 8: ...ead O Ring 10 2 07218 Positioning Tube 1 3 220857 Swirl Ring 45 85A Max Life 1 5 52677 Electrode 45 105A 5 6 220930 Cutting Tip 45A Precision Cut 10 7 220941 Cutting Tip 45A 10 11 60309TA Shield Cup Body 45 85A 1 13 51929 Shield Cap 45A Precision Cut 1 14 220817 Machine Shield 45 85A 1 16 07219 Positioning Tube With Rack 1 17 60309THA Shield Cup Body 45 85A C W Ohmic Clip 1 Please Note Configurati...

Page 9: ...losing the curtain to the welding bay or erecting screens Start the fume extraction unit before beginning cutting operation Ensure machine is used in a well ventilated area if not used in a welding bay OPERATIONAL SAFETY CHECKS Ensure machine is correctly set up for current and airflow Ensure work return earth cables make firm contact to provide a good electrical connection ENDING OPERATIONS AND C...

Page 10: ...ting the air flow The cutting torch may be burned if the air flow is too low Keep the cutting cable away from sharp edges When the workpiece is nearly cut off slow down the cutting speed and release the torch trigger to stop cutting Check the torch consumables frequently to prolong the life Always ensure the correct consumables are fitted in the torch Incorrect items may cause damage to the torch ...

Page 11: ...wing the tip across the workpiece You should always start with the torch placed at farthest point from you and then cut by pulling the torch towards you Make sure to keep the torch upright to the material being cut throughout the cutting process As you are cutting ensure you maintain a smooth and consistent travel speed to make a clean and precise cut There are 3 main reasons why plasma machine op...

Page 12: ...ptimal 2 3mm standoff without touching the cutting tip to the material for amperages 40amps and above When cutting at above 40amps touching the tip to the work material will adversely affect your cut quality and consumable life When you start to drag cut you would place the tip cap of the torch on the workpiece and begin dragging moving the torch across the workpiece You should always start with t...

Page 13: ...ould be held at a 90 perpendicular angle approximately 12mm or more above the workpiece Begin by establishing the pilot arc and slowly move the torch towards the workpiece until the cutting arc transfers Once the transfer has occurred hold the torch still until the arc exits the bottom of the workpiece Once the pierce has been made the torch can be lowered to normal cutting height and the cutting ...

Page 14: ...may depend on the gouging tip profile To create a wider groove you can oscillate the plasma torch side to side in a half moon sequence while maintaining a constant smooth travel speed The gouge created will be wider but not as deep Due to the nature of the gouging process lead covers gouging deflectors and torch covers are some accessories that will help to protect the equipment used in the gougin...

Page 15: ...ut further for cutting in corners using patterns or in tight areas It is generally best to start a cut from the edge of the plate hold the torch at 90 to the edge of the workpiece Press the trigger and pause at the edge until the cutting arc has completely cut through the material being cut When pierce cutting start the pierce just off the cutting line in the area of unwanted metal Angle the torch...

Page 16: ... are considered a better option than single phase compressors The accessories used with the compressor are also important providing the correct air pressure air flow which is moisture and oil free is crucial in ensuring that your plasma will give you quality cuts Air Hose Remember to select the correct bore size considering demand and length Filters Remove contaminants e g water and oil thus prolo...

Page 17: ..._________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ ____________________________________________ Notes Wilkinson Star Technical ...

Page 18: ...18 Jasic co uk Issue 4 July 2021 Wilkinson Star Limited Shield Drive Wardley Industrial Estate Worsley Manchester United Kingdom M28 2WD Telephone 0044 0 161 728 7900 Email sales wilkinsonstar com ...

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