Dynabrade Dynorbital Random Orbital Sanders available at aaabrasives.com

Dynabrade Random Orbital Sanders have an innovative, lightweight design that exceeds the expectations of customers. Dynabrade makes one of the highest quality abrasive power tools made in the USA. Used in hundreds of industrial applications, these sanders are great for finishing a wide variety of materials.  AA Abrasives, Inc. is a leading distributor of Dynabrade products.

Today in the Abrasives-Sandpaper Blog we are looking at the air powered Dynabrade Dynorbital Random Orbital Sander Series – their orbit patterns and their features.

Both the spinning of the sanding disc and the movement of the disc in an elliptical pattern ensure that no single part of the abrasive material moves in the same path twice, producing a random orbital motion. This unique sanding action is designed so that there are no perceivable swirl marks on the work surface. The diagram below illustrates the diameter orbit patterns and usage recommendations. All of the Dynabrade Dynorbitals are available in your choice of 3/8”, 3/16” or 3/32” diameter orbits. There is an aggressive 3/8” orbit, a 3/16” orbit for general sanding and a 3/32” orbit that is recommended for fine sanding in light to medium applications.

Random Orbital Sander Diameter Orbit Diagram

The D3 Random Orbital Sander series is comprised of:

1. The Dynabrade Dynorbital Supreme
2. The Dynabrade Dynorbital Silver Supreme and
3. The Dynabrade Dynorbital Spirit.

1. The Dynabrade Dynorbital Supreme 56815  is a cornerstone of the orbital sander series. It features the highest RPM in the industry while working on a work surface. The Dynabrade Dynorbital Supreme line features a perfectly balanced low profile, premium urethane weight-mated sanding pad for both smoother operator performance and minimum vibration. This line of random orbital sanders features a refined ergonomic tool grip to reduce fatigue and increase efficiency with a more comfortable grip.

2. The Dynabrade Silver Supreme is the newest member in the Dynabrade Random Orbital Sander family. The Dynabrade Silver Supreme 69020 Non-Vacuum Random Orbital Sander is a favorite in this line. The Dynorbital Silver Supreme features all steel components including a steel cylinder and end plates to maximize motor performance. These random orbital sanders have a perfectly balanced weight-mated sanding pad for smoother performance and minimal vibration.

3. The Dynabrade Dynorbital-Spirit Random Orbital series is lightest tool in the series and is ideal for vertical and contoured applications.  The Spirit series features a compact grip size - a reduction of 5% from other models in the series for operators with smaller hands. The Dynorbital-Spirit models feature the perfectly balanced weight-mated sanding pad for smoother performance and minimal vibration. The Dynabrade Dynorbital-Spirit 59020 Non-Vacuum sander is a good choice.

So in review, if you need...

…a random orbital sander for heavy aggressive sanding the Dynorbital Supreme would be recommended.

…a random orbital sander for general application the Dynorbital Silver would be recommended.

…a random orbital sander for vertical or contoured sanding applications the Dynorbital Spirit would be recommended.

All of these Dynabrade Dynorbitals are available with a pad diameter of 3 inch, 5 inch or 6 inch depending on the surface you need to sand. All Dynabrade Dynorbitals are available in Non-Vacuum, Self-Generated or Central Vacuum models.

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If you have any further questions about applications or tools please give us a call at 

1-800-888-1802. We are available Monday through Friday 8-5 EST to help with your application needs.

AA ABRASIVES WAFFLE WHEELS-FLEX-GRIND-FINISH-FGF WHEELS

AA Abrasives, Inc. introduces our newest wheel for grinding and finishing metals in one step. The AA Abrasives WaffleWheels-Flex-Grind-Finish-FGF-Wheels are reinforced resin bonded wheels with a flexible structure for multiple tasks.  The Waffle Wheel-Flex-Grind-Finish-FGF-Wheel is made of a white aluminum oxide grain for contaminate-free results and is recommended for metal, aluminum, non-ferrous metals, stainless and regular steel. 

     The face waffle pattern of the Waffle Wheels-Flex-Grind-Finish-FGF-Wheels is designed for cooler grinding and minimal material load up for a smooth finish. The flexibility of the waffle pattern on the face wheel is recommended on contours and is engineered to absorb vibrations to reduce operator fatigue. 

    

Some of the advantages of the Waffle Wheels-Flex-Grind-Finish-FGF-Wheel over a traditional grinding wheel are:

• They do not leave as deep scratches

• Operator has more control over taking down welds and metal removal while grinding

• Ability to have more control when getting close to Parent Metal

• A one step process prior to powder coat or painting over metal

Waffle Wheel-Flex-Grind-Finish-FGF Wheel

    The AA Abrasives Waffle Wheels-Flex-Grind-Finish-Wheels are used with a right angle grinder and are available in both a 7/8” and 5/8-11 arbor hole in a 4-1/2", 5" and 7” size in a T-27.

MetaboW8-115 Quick 600264420 as shown in video on electric power tool with AA Abrasives Waffle Wheels-Flex-Grind-Finish-FGF-Wheel 4-1/2x1/8x5/8-11 WA46-QBF#40750.

Recommended Dynabrade 52632 Air Grinder with AA Abrasives Waffle Wheels-Flex-Grind-Finish-FGF. Dynabrade 52632  for use with AA Abrasives Waffle Wheels-Flex-Grind-Finish-FGF-Wheel 4-1/2x1/8x5/8-11 WA46-QBF#40750.

Recommended Metabo W24-180 US606445760 electric power tool for use with AA Abrasives Waffle Wheels-Flex-Grind-Finish-FGF-Wheel 7 x 1/8 x 5/8-11 WA46-QBF #40754.

Recommended Dynabrade Air Grinder 50350 for use with AA Abrasives Waffle Wheels-Flex-Grind-Finish-FGF-Wheel 7 x 1/8 x 5/8-11 WA46-QBF #40754.

Our online abrasives store is always open - Visit us at aaabrasives.com anytime.

Or call 1-800-888-1802 to speak to an abrasives specialist - M-F 9-4 EST

GRINDING WHEEL GUIDE –

FEATURING THE 4 1/2 x 1/2 x 7/8 GRINDING WHEEL – Type 27 – A24R

AA Abrasives 40100 – Grinding Wheel – T-27 - A24R

4 1/2x1/4x7/8, Grinding Wheel, T-27, Resin Bond, A24R, Metal

• Our most popular wheel

• For general purpose grinding

• Longer life for fewer wheel changes

AA Abrasives – 40100 – Grinding Wheel

A24R grain is designed for use on tougher metals where consistent stock removal and wheel life is important. Grinding wheels made with this grain have a longer life than other grinding wheels resulting in fewer wheel changes.

What does it mean? A24R: A=Aluminum Oxide, 24=Grit (Coarse), R=Medium Bond. See the Grinding Wheel Guide below.

Portable grinders with Type 27 depressed center wheels are a favorite combination among the power tools users for metal fabricating.  AA Abrasives – 40100 – Grinding Wheel – T-27 - A24R is recommended for structural steel metal and welds and most other ferrous metals on grinders such as Dynabrade 50303 or Metabo WE14-125VS.

Dynabrade 50303 Depressed Center Wheel Air Powered Grinder can be used for fast stock and weld removal-rust and scale removal and heavy duty deburring with a 4 ½” Type 27 depressed center wheel like the AA Abrasives 40100.

Metabo WE14-125VS Electronic Variable Speed Small Angle Grinder is an alternate grinder that can be used with a 4 ½” Type 27 depressed center wheel like the AA Abrasives 40100. The advantage to using a variable speed grinder is that when you switch from a grinding application to a surface finishing application you can lower the RPMs according to the product specifications. If you do not require a variable speed grinder, check out the Metabo W8-115 4 1/2" Angle Grinder.

GRINDING WHEEL GUIDE

The First series of letters indicates Grain Type; A=Aluminum Oxide (Used in Metal Applications) C=Silicon Carbide (Used for Masonry Applications) ZA= Alumina Zirconium used for (Stainless Steel and Ferrous Metal Applications) TA=Ceramic Treated Aluminum Oxide (Used for Metal Applications)

The Second series of letters indicates Grain Size or Grit; 8-24=Coarse, 30-60=Medium, 70-180=Fine and 220-Up=Hard. The Third series of letters indicates Bond Hardness; A-N=Soft, O-S=Medium and T-Z=Hard.

Wheel Types; Type 1=Flat Wheel for Cutting, Type 27=Depressed Center Wheel for Grinding and Cutting Applications, Type 28=Hat or Saucer Shaped for Grinding and Type 29=constructed with an upward angle built into the grinding section to provide full face contact for light stock removal and blending operations.
Type 28 and Type 29 wheels may only be used on the face and never on the periphery for cutting-off.

Note: Harder Wheels have a longer life where a softer wheel will cut faster.

Fine Grain=Long Life=Slower Cutting and Grinding.

Coarse Grain=Short Life=Fast Cutting or Grinding.

HOW TO USE RESIN BOND MOUNTED POINTS FOR GRINDING

Grinding applications require mounted points that have a perfect balance in terms of chip performance, intended surface finish and service life. In foundries and mold forming operations, the use of mounted points on straight grinders and flexible shafts is often the only method of getting to hard-to-reach parts on workpieces and simultaneously improving the surface.

For best mounted point performance, always run the mounted point at the maximum allowable speed according to AnSI B7.1. 

Resin Bond Mounted Points

“W” shapes are best used for offhand and precision grinding of medium to heavy stock . The most commonly used mounted points are the A-1 Resin Bond Mounted Points, A-3 Resin Bond Mounted Points and the W220 Resin Bond Mounted Points.  AA Abrasives resin bonded mounted points are made of premium aluminum oxide and designed for a high RPM die grinders. They are excellent for weld removal on hard to reach areas on metal and stainless steel. 

AA Abrasives resin bond mounted points are made from Aluminum Oxide, these mounted points come with a 1/4" shank.


In the video below, a W220 resin bond mounted point is used on a Dynabrade 52678 Straight Line Extension Die Grinder to finish 304 stainless steel racks.

If you are interested in A-1 or A-3 resin bond mounted points, please visit the appropriate link below - A-1 Mounted Points A-3 Mounted Points

Our online abrasives store is always open - Visit us at aaabrasives.com anytime.

Or call 1-800-888-1802 to speak to an abrasives specialist - M-F 9-4 EST

PSA Gold Sanding Disc Used for Surface Finishing

Gold Sanding Discs

PSA gold stearate sanding discs are made with premium aluminum oxide grain. Non-loading gold aluminum oxide sticky back sanding discs are suitable for most lacquer and polyurethane finishes on woods. Their non-loading pressure sensitive paper reduces dust and grit contamination. The sanding discs are available in stacked or roll packages to suit your shops needs. 

Sticky backed abrasive sanding discs are available in a series of grits - choose from 40 Grit to 600 Grit.  The most common grits used for removing surface scratches on metal are 150, 180 and 240 grit.  This enables a step down process for surface scratch removal depending upon the depth of the surface scratches. 

Gold stearate sanding discs used with a random orbital sander such as a Dynabrade 56815 Dynorbital Supreme is an effective combination for removing surface scratches on metals and alloys such as stainless steel and pot metal.  Both 5” PSA gold stearate sanding discs and 6 inch pressure sensitive sanding discs are available to fit a wide array of sanders.

This video shows a Dynabrade Dynorbital Supreme random orbital sander using a 5" #180 PSA gold stearate sanding disc - AA Abrasives part # 59031 -to remove surface scratches on an automotive door handle cast from pot metal. Pot metal also known as white metal or die cast zinc is an alloy comprised of low melting point metals. Zinc is generally the primary component alloyed with a combination of tin, aluminum and copper.  Pot metal is used in the automotive industry for door handles and hood ornaments.

View our line of 

stacked PSA sanding discs and PSA gold stearate roll sanding disc.

Our online abrasives store is always open - Visit us at aaabrasives.com anytime.

Or call 1-800-888-1802 to speak to an abrasives specialist - M-F 9-4 EST