Deprecated: strripos(): Non-string needles will be interpreted as strings in the future. Use an explicit chr() call to preserve the current behavior in C:\www\flexe\stable\require\functions.php on line 6725
Some Blogs about Deprag products | Page 2
Contact Blog
1300 769 290

Blog: Deprag

New ATEX Approved Power Line Air Motors

Posted on 09 Jun, 2016
New ATEX Approved Power Line Air Motors

Short and sweet update.

Deprag have updated their POWER LINE of air motors.  Especially the motors in the 1.6 to 6.0kW range.  The big news is that there are now 12 ATEX approved motors with planetary gearboxes and IEC flanges.  4 of those ATEX approved motors have a working speed at or close to 1500rpm, so these motors will be able to directly replace an electric motor provided the flanges match up.

The best news is that the new motors are cheaper than the old range and in many cases more powerful!

Details in the catalogue here or on the POWER LINE motors page here.

Better Sheet Metal Joints

Posted on 29 Mar, 2016
Better Sheet Metal Joints

Innovative Sheet Metal Fasteners


Flow Drill Screws, Flow Form Screws


FDS® screws from EJOT and FFS® screws from Arnold have been around for a while.  They offer the benefits of a secure and strong joint from one side between two sheet metals.  A big advantage is that they can join dissimilar materials like aluminium, steel and plastics where spot welding is not possible (they are finding more and more applications in the automotive industry where aluminium and other materials need to be joined).  They also allow the use of thinner sheets without the use of additional hardware to strengthen the joints (this is making them more popular in the whitegoods industries).

The screws form a hole by high pressure and the speed of the screw, the heated material is then threaded and cools around the screw.  The joint is strong, and the unscrewing torque is high.  The thread formed is upto 3 times thicker than the sheet metal.


  1. Heating the metal with high end load and high speed screwdriver
  2. Penetrating the material
  3. Forming of the hole
  4. Forming of the screw thread
  5. Engagement of the threads
  6. Final tightening into the cool thread





Advantages for joining sheet metal:

  • No swarf or chips
  • Stronger joint, higher screw torque possible
  • Higher torque means a larger torque window and less chance of stripping
  • Screws can be replaced with standard metric screws
  • No additional hardware required to strengthen the joint
  • High unscrewing torque and vibration resistance
  • Possibility of joining thinner materials
  • Possibility to join Aluminium
  • Can be accessed from one side
  • Possibility to join sheets without pre-drilling (in automated applications)




What's the deal with Turbine Powered Grinders?

Posted on 03 Nov, 2015
What's the deal with Turbine Powered Grinders?

Unfortunately compressed air turbine powered grinders are overlooked by factories because of their high initial cost compared with cheaper tools.  Here we are going to go through and explain some of the advantages of these grinders andd try to explain how they will actually save your organisation money in the long term.


240V electric powered grinders are readily available and reasonably cheap, but iunder the stress of continual use an industrial quality air grinder will always outlast the electric grinder as long as it has a quality air supply.  Air grinders will not be affected by dust in the air, they cannot be overloaded or overheated.  The air grinder will also be lighter than an electric grinder with the same power output.  Especially in the case of 230mm grinder, air grinders are available with higher power outputs.  Please note! Most electric tool manufacturers quote the max power input to their tools.  Air tool manufacturers quote the max power output!  So a typical 1000W 240V grinder will only output 600 to 700W of power.  A 1000W air grinder outputs 1000W as long as you have enough air to run it.


Often we want maximum power without the weight right?  It's not helpful to have high power and high weight or low weight with low power.  Higher power with lower weight means that the work is done faster and with less fatigue.  Less fatigue means less chance of accidents, less breaks and less down time.

Air powered grinders are often chosen over electric tools because for a given power, the vane motor powered grinder is going to be lighter and smaller than a 240V electric grinder. Smaller and lighter tools mean that the operator is not going to be as tired, he can work longer without breaks and there is less chance of injury.

Turbine powered grinders take this a step further.  For example: 

125mm Grinder comparison










230mm Grinder comparison













Why is high power more important?              Because it saves you money of course!

  • Faster material removal - time is money right?  If your trigger time is 3 hours per day, your extra material removal can be a tonne or more over a year compared to a vane powered tool.
  • Optimal cutting / grinding speed means that your abrasives last longer - save over 30% on your abrasive costs if you are using quality abrasives!
    • If low powered tools are used, the speed drops when pressure is applied resulting in faster abrasive wear.  HIgh powered tools with speed governors do not slow down.


Turbine motors have all the advantages of vane motors - (cannot overload, cannot overheat, not affected by dust etc), but they do not have vanes, which is a wear part.  As long as they have clean, water free compressed air, you can depend on them for a trouble free lifetime whereas vane motors have wear parts - especially vanes, that have to be replaced every so often.


Compressed air is EXPENSIVE.  The turbine compressed air motor is already a comparatively efficient air motor (see the above comparisons) which of course means it will cost you less to run your compressor. Deprag has also taken advantage of some of the turbine motor's characteristics to make them even more efficient.

Deprag has included a speed governor in it's range of turbine grinders which means that when the tool is not under load it consumes less than half of the air that it uses when under full load.  As the load increases the govenor progressively opens the air inlet valve, increasing the air supply and thereby increasing the power.  The governor also maintains the correct speed no matter what the load - extending the life of your abrasives.



To really understand the value of turbine powered angle grinders you need to look past the initial cost, especially if grinding is a big part of your business.  The lifetime cost of every tool has to be considered.  Compressed air, abrasives and man-hours are not cheap and they all add up over time.  Many companies have done the tests and have come to realise that the savings we are talking about are real and significant.  Don't ignore the facts!

Take a look at the Deprag 230mm Turbine grinder in action here: 



Screwdriving tools and feeding technology for the cleanroom

Posted on 20 Sep, 2015
Screwdriving tools and feeding technology for the cleanroom

Dirt or dust particles can cause damage to some products or the system into which the sub-assembly will be integrated.

In these situations it is important to avoid abrasion, reduce abrasion or target its removal! These are the basic requirements for screwdriving assembly in clean rooms to ensure the quality of the components to be processed. The DEPRAG CleanFeed Concept provides an overall solution.

Advantage: Integrated design for technical cleanliness. Deprag’s complete program is coordinated for all required individual components,  from the feeder to the screwdriver, semi automatic or fully automatic – all from one source.

Function: The screws are stopped in switch position 1 and the residual dirt is removed from the feed parts  via vacuum suction. The removed dirt particles are then collected in a filter with transparent inspection window and a replaceable filter element. In switch position 2 the cleaned connection element is fed into the screwdriving module (inline version) or prepared for pick up (Pick&Place version).

The components below can be used to obtain an optimal result:


Low abrasion parts feeder

Low abrasion parts feeder

  • DEPRAG HSF sword feeder – vibration free screw feeding – therefore no component friction and minimal abrasion





Removes particles for the feed tube

Removes particles for the feed tube

  • DEPRAG Particle killer – dirt particles from the feeder are targeted and removed in-line






Clean room pick point for screws

Clean room pick point for screws

  • DEPRAG Clean Pick-and Place unit – Screws are fed to to the pick point in the unit, which also has a vacuum to remove particles





Clean room ready Screwdriver

Clean room ready Screwdriver

  • DEPRAG SFM-V vacuum screwdriving module, which fits onto the screwdriver – residual dirt is removed by suction via an additional vacuum source when positioning the screwdriver.

Are air tools and air motors safe for use in hazardous areas?

Posted on 17 Aug, 2015
Are air tools and air motors safe for use in hazardous areas?

Air tools and air motors are still assumed to be safe for use in explosive environments and in underground mines, but are they really?  How safe is “safe”?

The simple answer is yes, in general air tools are safe for use in hazardous areas, but not always.  Many types of cutting & grinding tools are not safe no matter what type of motor they use – for example grinders.  Other tools like drills, hacksaws, impact wrenches and air motors are widely considered to be safe. The issue is how safe are they really?

ATEX approvals show that motors and tools have been tested and are safe to use in the indicated temperature zones.

ATEX approvals show that motors and tools have been tested and are safe to use in the indicated temperature zones.

Depending on the cutting speed, some drills and air hacksaws are not safe for use in hazardous areas at all.  Also the quality of the motor and it’s components can lead to overheating of the bearings.

Some gases and dusts can explode at very low temperatures, for example carbon disulfide can ignite at 90 degC.

So what temperature does the air tool or air motor run at?

Do all air powered motors run at the same temperature?

Of course of course they don’t.

ATEX approvals were introduced in the EU to certify the safety of equipment that is going to be used in hazardous areas.  All tools and equipment that have ATEX approvals are marked with a code that identifies:

  • Which zone the equipment is safe to be used
  • What temperature range the tool operates
  • If the tool is suitable for operations where explosive gas and/or dust is present
  • Whether the tools is safe for underground or general industrial use

ATEX approvals clarify whether or not an air tool or air motor is safe to use in a particular hazardous area thereby avoiding assumptions about safety that can lead to serious injuries or catastrophic explosions.

Our full range of air hacksaws are ATEX approved some for underground, but most for above ground use.

Most of our air motors in the Advanced Line and Basic Line ranges are ATEX approved for use around explosive gases and dusts.

Our Undergound mining impact wrenches are also ATEX approved for use in underground coal mines.