FAQ

Frequently Asked Questions

What speed can I run DuraGRIT® tools at?

DuraGRIT® tools have maximum speed ratings (see below). Like any tool however, you should start slowly using light pressure and increase the speed until you reach the optimum cutting/shaping performance for the material you are working on.  With wood that would typically be when the wood starts get hot, smell or burn. At that point, reduce the speed slightly.  With plastics, increase speed gradually - again using light pressure - until the material starts to heat up or melt and then back off slightly.  At all times - DO NOT apply too much pressure.  Let the tool do the work and you will achieve a nice smooth finish and at the same time reduce the need to clean clogs from the cutting surface of the tool. 

 

DuraGRIT® rotary tools are rated to run up to the following speeds:

High Speed Rotary Carbide Cutting Wheels & Carving Burrs
(Model # starts with SR- and have 1/8" diameter shaft)
Run up to 35,000 rpm

Industrial Carbide Tools
(Model # starts with LR- and have 1/4" diameter shaft)
Run up to 15,000 rpm

 

What materials can I use DuraGRIT® tools on?

Hard and soft woods, MDF, Fibreglass, Carbon fibre, Multiple types of composite, Kevlar, Rigid and flexible PVC, ABS, Lexan, Acrylics, Laminates, Rigid foam, Brass, Copper, Ceramics, Brick, Stone, Slate, Marble Vegetable gourds, and even soft materials such as leather, rubber etc.

 

Can I use my DuraGRIT® tools on metal?

Yes but they can wear faster than on non-metallic materials.  DuraGRIT® generally doesn’t recommend using the carbide tools on metals. Steel is hard and can wear the grits faster than other materials. Aluminum is soft and can clog the grits. Copper and brass are less problematic and using a mold release such as 'dry stearate spray' on the carbide grit prior to working on softer metals, can reduce the tendency to clog and make clean up easier.

 

How do I clean my DuraGRIT® tools?

Keeping DuraGRIT® tools clean will maximize their incredible performance and extend their useful working life.  See "Cleaning DuraGRIT® Tools" for tips below...

 

How do I prevent clogging with my DuraGRIT® tools?

Run at optimum speed for material being cut (see above) and use light pressure.  This will reduce clogging.

Materials that are sticky (paint, urethane, epoxy glues etc.), will clog any abrasives. Spraying the tool working surface before use with a mold release spray (Stearate by Krylon® for example), will help with the removal of stubborn, sticky clogs afterwards. See "Cleaning DuraGRIT® Tools" for tips below...

 

Where did the grit go on my rotary DuraGRIT® tool?

If you think the grit has come off your rotary tool, it is mostly likely buried under carbon or debris clogs, leaving a smooth shiny surface.  Cleaning the tool will bring the grit back as good as new.  See "Cleaning DuraGRIT® Tools" for tips below...

 

Can I use my DuraGRIT® wheels and carbide coated screw tips, on other mandrels?  

No.  DO NOT attach DuraGRIT® rotary wheels and screw tips to other mandrels. DuraGRIT® mandrels are extra strength. Attach DuraGRIT® tools only to the mandrels they are supplied with.  

 

How far into the chuck must I position the DuraGRIT® rotary tool?

Rotary tools with black mandrels, should be inserted into the drill chuck or collet, up to the shoulder of the shaft.  Non-black, one piece shafted rotary tools should be inserted at least half of the ungritted shaft length.

 

Where is the red washer positioned with DuraGRIT® cutting and shaping wheels?

Before dismantling my cutting wheel, I noticed that the red washer was positioned between the back of the wheel and the shoulder/flange of the mandrel.  Is that correct? 

Yes, position the red washer between the back of the wheel and the shoulder/flange of the mandrel.

 

Can I run my DuraGRIT® rotary tools in reverse?

Any DuraGRIT® wheel or rotary tool that has a black mandrel, must NOT be run in reverse.  If you have a reversible drill such as Foredom®, make sure it is set to run in forward direction (counter clockwise when looking at the tip of the tool).  One piece DuraGRIT® rotary tools (non-black mandrels), can be run counter clockwise or clockwise.

 

Grit Grades:

DuraGRIT® Tools are coated with carbide grains that equate to the US Mesh system of measurement. Therefore a 60 grit DuraGRIT® tool is equivalent in grade to a 60 grit sandpaper product.  European grading is slightly different but very similar. The good news is, when you start using your DuraGRIT® tool, it remains the same grade from start of the job to the finish of the job, leaving a consistent finish, unlike sandpaper products that wear quickly, degrade in grit grade and leave an inconsistent finish. 

 

Safety Tips:

  • When using DuraGRIT® Tools, always wear eye protection and respirator mask.  (Cutting, sanding and grinding tools create dust.)   
  • Never run DuraGRIT® tools with black mandrels, in reverse.
  • Insert a DuraGRIT® extra strength, black mandrel into the collet or chuck of your drill, up to the shoulder.  One piece shafted tools, insert at least 50% of the ungritted portion of the shaft into the chuck or collet.
  • Do not mount a DuraGRIT® wheel or screw tip part, on a third party mandrel. Only use DuraGRIT® Extra strength black mandrels and screws.
  • Do not touch a rotating DuraGRIT® tool.
  • Do not use a DuraGRIT® tool that has been dropped.
  • When cleaning DuraGRIT® tools, wear gloves, eye protection and respirator.

 

Cleaning DuraGRIT® tools:

The already amazing working life of DuraGRIT® carbide tools, can be further extended by regular care and cleaning.

Following are some cleaning tips:

Hi-Speed Rotary Carbide Cutting Wheels & Carving Burrs
Model # begins with: SR- or LR-

Everyday debris: (e.g. Sawdust)

  • Run the tip or wheel in the bristles of a wire brush at medium to low speed.
  • TIP: Clean regularly to avoid build up and accumulation

Accumulated clogs: (e.g. Sawdust, laminates etc.)

  • Run the tip or wheel on the face or edge of a commercially available ‘uncured’ rubber block

Sticky Clogs: (e.g. Wood sap, resin or old paint)

  • Remove the screw and washer that secures the wheel or tip to the mandrel
  • Soak the tip or wheel in solvent such as acetone (available from most hardware stores), for 5-10 minutes (Wear rubber gloves)
  • Remove from solution and brush with a wire brush to remove any remaining residue
  • Re-assemble the wheel to the mandrel, placing the red washer between the wheel and the mandrel.

Stubborn clogs: (e.g. Burned wood - carbon)

  • Remove the screw and washer that secures the wheel or tip to the mandrel
  • Place the wheel or tip on a saucer and spray with oven cleaner.  
  • (Wear rubber gloves and take normal precautions not to spray yourself or inhale the product spray)
  • Leave for an hour and flush with water while rubbing with a wire brush
  • Re-assemble the wheel to the mandrel, placing the red, fibre washer between the wheel and the mandrel.

HAND TOOLS (HT-) and DISCS & BLADES (DB-): 

Note: DO NOT run hook & loop orbit sanders during cleaning.

Everyday debris: (e.g. Sawdust)

  • Vigorously rub the surface of the sheet, file or disc, with a stiff wire brush.
  • TIP: Brush regularly to avoid build up and accumulation
  • TIP: TruSanders have dust collection channels behind the perforated carbide plate. Simply ‘tap’ the handle on the bench to clear sawdust.

Accumulated clogs: (e.g. Sawdust, laminates etc.)

  • Rub the surface of the tool with a commercially available ‘uncured’ rubber block

Sticky Clogs: (e.g. Wood sap, resin or old paint)

  • Remove the carbide sheet or disc from the handle or sander
  • Brush the sheet or disc with a wire brush dipped in acetone to remove any sticky residue
  • Allow time to dry before re-installing
  • TIP: Save time and effort, use ordinary disposible discs for sticky surfaces and throw the clog away with the disc. Save your DuraDisc for clean sanding.

Stubborn clogs: (e.g. large accumulations of hard sap, paint residue etc.)

  • Remove the carbide sheet or disc from the handle or sander. 

LOOP BACKED SANDING DISCS
DuraDisc DB-DS5

  • Heat the loop backing with a heat gun or hair dryer until the adhesive softens enough to peel off the loop pad. 
  • Lay the sheet or disc on a non flammable surface (e.g. concrete block) and burn the clog from the sheet or disc  with a propane torch. 
  • (IMPORTANT: Take normal precautions not to burn yourself or inhale fumes/smoke etc.)
  • When cool, rub the surface with a wire brush to remove burned residue. Re-mount sanding sheet to the handle. 
  • In the case of sanding discs, clean the non-grit side of dirt, dust and oil with Rubbing Alcohol and apply a new, white, DB-DL5-HD2, loop pad (click here for more details), carefully following the application instructions that comes with it.
  • TIP: The best way to deal with stubborn clogs, is to avoid them in the first place. Save wasted time and effort cleaning. Use ordinary disposible discs for sticky surfaces and throw the clog away with the disc. Use your long life DuraDisc for clean sanding.

 

If you have any further questions, please feel free to contact us.

DuraGRIT Tungsten Carbide Tools and Burrs That Really Work and Work

Call Dura-GRIT Toll Free:  1 (844) 447-GRIT (4748)

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