5 Handy Surface Grinder Accessories. Surface grinder attachment
Model C and Model C6 DedTru Centerless Grinding Fixtures
When you install a DEDTRU Model C and/or Model C6 Centerless Grinding Fixture on a precision surface grinder,you create a centerless grinding system capable of highly precise thrufeed, infeed and ID/OD plunge grinding. This centerless system is easy to use and requires only a fraction of the time usually needed to set-up a conventional centerless grinder. Both the standard Models C and C6 are designed for OD/ID grinding of parts with diameters from 1/4″ to 1-1/4″. However, these Fixtures can grind both larger and smaller diameter parts with special tooling.
Using a DedTru Fixture in conjunction with a surface grinder creates an unique centerless grinding system which grinds straight and round parts for thrufeed applications. The DedTru is ideal for plunge grinding parts which need to be concentric from one diameter to another. DedTru Fixtures also perform infeed operations which require extremely precise roundness.
DedTru Grinding Fixtures are manufactured on a rugged cast aluminum base which supports a precision Regulating Roll, Work Blade, Guide and Rest Plate (for thrufeed grinding) and Pressure Roll (for plunge grinding). A Spindle supports the Regulating Roll, driven by a variable speed power supply. Unison’s proprietary Spindle design forms the foundation of the DedTru Fixture’s precision in roundness, straightness and concentricity. Our method of applying preloaded bearing support for the Spindle assures the Regulating Roll does not move either axially or radially with respect to the base during grinding. In addition, this method of preloading the bearings does not introduce deformation in the Spindle. Most importantly, all of our DedTru’s are manufactured with super high precision bearings which virtually eliminate run-out. The running accuracy of our bearings is the highest available in the industry (ABEC Class 9). The Model C and Model C6 Fixtures can consistently grind parts to a roundness accuracy within five millionths of an inch depending on your specific application and grinding environment.
Every DedTru is supplied with a work blade support which allows the operator to raise/lower the work blade and/or adjust/swivel the blade for thrufeed or plunge applications. The operator can also adjust the height of the rest plate/guide plate as necessary during thrufeed applications. DedTru Fixtures also allow the operator to adjust the pressure roll during plunge work.
The Dedtru is equipped with a built-in manifold to provide coolant to the Regulating Roll and coolant is also supplied to two coolant tubes as well as to the location of the Kooldress Cluster Diamond for dressing your grinding wheels. A wiper is also furnished with each Dedtru Fixture to keep the Regulating Roll’s surface clean during operation.
Each DedTru is supplied with a Sine Base for mounting the Fixture to your surface grinder. The Sine Base is furnished with four Cradle Blocks which allow the operator to tilt the Fixture either toward or away from the surface grinder’s column.
The Power Supply allows the operator to control the regulating roll speed, as well as the forward/neutral/reverse switch. The Power Supply also includes a place for the operator to plug-in an optional Limit Switch Assembly.
The following are the Standard Accessories furnished with each DedTru Fixture to allow you to thrufeed, plunge and infeed grind parts with diameters of between 1/4″ to 1-1/4″:
| 1 | Carbide-tipped Work Blade for throughfeed grinding |
| 1 | Rest Guide Assembly |
| 4 | Pairs of Guide Risers for thrufeed applications |
| 1 | Work Blade for plunge grinding |
| 1 | 1-1/4″ Diameter Pressure Roll Assembly for plunge grinding |
| 1 | Kooldress cluster diamond for dressing grinding wheels |
| 1 | Infeed Slide Assembly for infeed applications |
| 2 | Adjustable Coolant Directing Tubes |
| 1 | DedTru Sine Base Assembly |
| 1 | Regulating Roll |
| 1 | Regulating Roll Wiper |
| 1 | Variable Speed Power Supply |
| 1 | Carbide-tipped Part Stop |
| 1 | Coolant Pump and Coolant |
| 1 | Supply Hose and Flow Control Valve |
| 3 | Adjustment Wrenches |
| 1 | Operator’s Manual |
| 1 | Custom-made IPPC approved storage/shipping crate |
DedTru Fixtures are easy to use and a self-instruction manual is provided. However, if training is requested, we can provide it at Unison’s facility for a fixed price per day. Instruction is customized to each customer’s specific needs for thrufeed, plunge and/or infeed operations with hands-on experience for the operator. Customers are encouraged to bring their parts with them so we can recommend the best approach for grinding them.
Suggestions for equipping your surface grinder for a DedTru fixture.
In addition to the DedTru Fixture, your surface grinder should be equipped with the following optional accessories which are available from Unison. These items are not included with your DedTru Fixture and must be ordered separately:
| Splash Pan Assembly with Drain Hose (116-0000). Specify make model of your surface grinder |
| FilTru Tank Filter Assembly (079-0000) |
| FilTru Coolant Settling Tank (080-0000) |
| Limit Switch Control Assembly (077-0000). Starts and stops the Regulating Roll to facilitate loading/unloading of parts |
| Regulating Roll Dresser |
| Additional Work Blades and Guides for your specific application |
Additional Options can be found in DedTru Parts Brochure.
For precise grinding and the best part finish, your surface grinder must be of rigid construction. The base and column should be capable of absorbing grinding forces with a minimum of deflection. Unison suggests you use a 3 horsepower grinding spindle and it should be adequately preloaded, both axially and radially, to prevent movement of the grinding wheel under varying conditions. The vertical, longitudinal and crossways must be in good condition and the slides should have non-measurable movement in the planes at right angles to their direction of motion.
For additional information regarding the products of Unison, please contact our Marketing Department at (248) 544-9500; fax us at (248) 544-7646 or e-mail us at sales@unisoncorp.com
Model PGF Plunge Grinding Fixture
When you install a DedTru Model PGF Centerless Grinding Fixture on a precision surface grinder, you create a centerless grinding system capable of highly precise ID/OD, infeed and plunge grinding. This centerless system is easy to use requires only a fraction of the time usually needed to set-up a conventional centerless grinder. The standard PGF Fixtures is designed for grinding parts with diameters from 1/4″ to 1-1/4″. However, these Fixtures can grind both larger and smaller diameter parts with special tooling. Using a Model PGF Grinding Fixture in conjunction with a standard surface grinder creates a unique centerless grinding system which can plunge grind both straight and round parts. The PGF Fixture is ideal for plunge grinding parts which need to be concentric from one diameter to another. These DedTru Fixtures also perform infeed operations which require extremely precise roundness.
DedTru Grinding Fixtures are manufactured on a rugged cast aluminum base which supports a precision Regulating Roll, Work Blade and Pressure Roll Assembly. The Regulating Roll is powered by a variable speed motor and is connected to our proprietary Spindle which forms the foundation for the DedTru Fixture’s precision in straightness and concentricity. All of our DedTru’s are manufactured with super high precision bearings which are uniquely installed so the Regulating Roll does not move, either axially or radially with respect to the base during grinding. These bearings virtually eliminate run-out since their running accuracy is the highest available in the industry (ABEC Class 9). Extreme care is exercised at Unison during the installation of the precision bearings to apply the exact preload necessary to maintain the close tolerances the PGF is capable of holding with respect to roundness, straightness and concentricity. The Model PGF Fixture can consistently grind parts within roundness accuracy of five millionths of an inch depending on your specific application and grinding environment.
The PGF Fixture was designed so the operator has the maximum access to the part being ID ground. This DedTru can also be used for OD infeed and plunge grinding. The PGF is supplied with a steel core Regulating Roll which is 2″ wide and 5″ in diameter. An optional 3″ wide Regulating Roll is available upon request. Regulating Rolls can be quickly and accurately interchanged since they mount to an adaptor which fits the same spindle taper of both the 2″ wide and 3″ wide Regulating Rolls.
Every Dedtru is supplied with a work blade support which allows the operator to raise/lower the work blade for plunge applications. The operator can also adjust the pressure roll as necessary to hold the part.
DedTru’s have a built-in manifold to supply coolant to the Regulating Roll and to additional outlets located on the Fixture. A wiper is also supplied to keep the regulating roll’s surface clean.
Each Dedtru is supplied with a Sine Base for mounting the Fixture to your surface grinder. The Sine Base is furnished with four Cradle Blocks which allow the operator to tilt the Fixture toward or away from the surface grinder’s column.
DedTru Fixtures are also supplied with a Power Supply which allows the operator to control the speed of the Regulating Roll as well as the forward/neutral/reverse switch. The Power Supply also includes a place for the operator top plug-in an optional Limit Switch Assembly.
The following are the Standard Accessories furnished with each PGF Fixture to allow you to grind parts with diameters of between 1/4″ to 1-1/4″:
| 1 | 2″ x 1/4″ Carbide-tipped Work Blade |
| 1 | 1-1/4″ Diameter Pressure Roll Assembly for plunge grinding |
| 1 | Kooldress cluster diamond for dressing grinding wheels |
| 2 | Adjustable Coolant Tubes |
| 1 | DedTru Sine Base Assembly |
| 1 | Regulating Roll |
| 1 | Regulating Roll Wiper Assembly |
| 1 | Variable Speed Power Supply |
| 1 | Carbide-tipped Part Stop |
| 1 | Coolant Pump and Coolant |
| 1 | Supply Hose and (1) Flow Control Valve |
| 3 | Adjustment Wrenches |
| 1 | Operator’s Manual |
| 1 | Custom-made IPPC approved storage/shipping crate |
DedTru Fixtures are easy to use and a self-instruction manual is provided. However, if training is requested, we can provide it at Unison’s facility for a fixed price per day. Instruction is customized to each customer’s specific needs for thrufeed, plunge and/or infeed operations with hands-on experience for the operator. Customers are encouraged to bring their parts with them so we can recommend the best approach for grinding them.
Suggestions for equipping your surface grinder for a DedTru fixture.
In addition to the DedTru Fixture, your surface grinder should be equipped with the following optional accessories which are available from Unison. These items are not included with your DedTru Fixture and must be ordered separately:
| Splash Pan Assembly with Drain Hose (116-0000). Specify make model of your surface grinder |
| FilTru Tank Filter Assembly (079-0000) |
| FilTru Coolant Settling Tank (080-0000) |
| Limit Switch Control Assembly (077-0000). Starts and stops the Regulating Roll to facilitate loading/unloading of parts |
| Regulating Roll Dresser |
| Additional Work Blades and Guides for your specific application |
Additional Options can be found in DedTru Parts Brochure.
For precise grinding and the best part finish, your surface grinder must be of rigid construction. The base and column should be capable of absorbing grinding forces with a minimum of deflection. Unison suggests you use a 3 horsepower grinding spindle and it should be adequately preloaded, both axially and radially, to prevent movement of the grinding wheel under varying conditions. The vertical, longitudinal and crossways must be in good condition and the slides should have non-measurable movement in the planes at right angles to their direction of motion.
For additional information regarding the products of Unison, please contact our Marketing Department at (248) 544-9500; fax us at (248) 544-7646 or e-mail us at sales@unisoncorp.com
Handy Surface Grinder Accessories
A surface grinder is a metalworking machine that is used for finishing the surface of the workpiece.
Following are some of the most commonly used accessories for surface grinding machines.
- Magnetic chuck or table
- Wheel Dresser
- Grinding Vice
- Sine Table
- V-Blocks
Let me explain to you the uses of these surface grinding accessories.
Magnetic Chucks
Magnetic chucks are work-piece holding devices by means of magnetic force and you use this extensively in surface grinding machines; magnetic chucks are available in circular and rectangular shapes. This is extremely useful when you need to grind small components.
You have two types of magnetic chucks- one with a permanent magnet where you engage or disengage the magnet by using a lever; and another with an electromagnet where you can switch the magnet on or off (from your electric box).
The magnetic chuck is not a part of your machine, but an accessory for the surface grinder that needs to be clamped onto the bed. Hence, you need to true the top of the chuck with the wheel axis, by grinding off a thin layer before use.
Since you will be using the magnetic chuck in on position during grinding process, it is wise to grind its top after putting it on or in engaged position.
Wheel dresser
Your diamond wheel dresser has single or multiple diamonds mounted on a shank by a sintering process. Single point dresser is more popular and you use it for truing and dressing of your abrasive grinding wheel.
When you use the grinding wheels for grinding, over time the wheel surface becomes glazed and filled with chip particles. You have to true and dress such grinding wheels to improve the performance of the wheel and geometrical accuracy and finish of the work-piece. During dressing, you are removing the glazed abrasive particles and expose the fresh abrasive particles beneath it.
You have to make a holder and fix the dresser in it, tilting slightly towards one side.
For doing the dressing process, mount your dresser on the magnetic chuck (on the trailing edge of the grinding wheel) roughly 5-8 mm away from the vertical axis of the wheel; tilting of the dresser should be in the direction of wheel movement. This method is safe because, in the case of the dresser getting loosened, the grinding wheel pushes it out and will not suck it.
You can use a depth-of-cut of 0.02-0.05 mm for roughing and 0.01-0.02 for finishing.
Precision Grinding Vise
You need a good quality vise (or vice outside the United States) for holding components during surface grinding. Your vise is hardened and ground on all sides and has one fixed jaw and one movable jaw. Vice with a ‘V’ on the inside of the movable jaw is available for clamping round work-pieces. You can use a smaller vise on a magnetic chuck and clamp the bigger vice directly on the machine table. The direction of the clamping bolt in your vice is slightly downward so that the component is securely put in position.
You also have double partition vice for clamping two work-pieces simultaneously.
Sine Table
Suppose you need to grind your workpiece at a particular angle with a high level of accuracy, Sine Table comes to your rescue. Your simple sine table has two rectangular hardened and ground plates connected together by a hinge and roller. You can tilt the top plate on the axis of the hinge up to 45 degrees and lock it at any desired angle. The top plate has a magnetic chuck or a precision vice so that you can clamp your workpiece. The bottom plate can be clamped to your machine table. Also, you will find a reference roller fixed on the movable side of the top plate.
For setting the top plate (on which the workpiece is mounted) at an angle with the bottom plate, you need to calculate the vertical distance between the inner face of the bottom plate and the roller on the top plate. You can easily calculate this by going to the manufacturer’s website. Once you get this vertical distance, use your slip-gauges to build up the height and set the angle between the top and bottom plate.
You also have a compound sine table where you are able to set two different angles in two axes or planes.
V-Blocks
Your V blocks are rectangular blocks with a V-shape on the top for holding round-shaped components. The V blocks are made of good quality steel, hardened and ground and you can mount it on the magnetic chuck of your machine. Your V block comes in various lengths and clamps to clamp the work-pieces on the V block.
V blocks are convenient to clamp circular components for surface grinding on your machine.
Beginnings of a surface grinder attachment for the 2×72” belt grinder.
Beginnings of a surface grinder attachment for the 2×72” belt grinder.
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Accessories
We’re working hard to bring a full selection of accessories to our belt grinder line, so you can make the most of your grinder. Expect great things to come!
Small Wheel Attachment
The small wheel attachment is the easiest way to get into those tight, hard to reach places such as finger guards, or to get precise small radiuses for tube notching. The interchangeable small contact wheels have press fit bearings on either end and simply slide into the receiver arms on either side of the small wheel attachment, making it quick and convenient to change sizes. Sized for R6-2RS bearings (7/8” ID).
Comes with it’s own 6061 aluminum tooling arm.
price includes a 3% cash/check discount.
R.A.T. Arm (Rotary Adjustable Table) V2
The R.A.T. Arm is a multi-axis work rest that will allow you to use different sections of the 2×72 belt in many different angles and positions. It is adjusted with a single Allen wrench. The 1/4” thick steel tool rest is 8” x 5” and notched to fit around the flat platen. It is tapped from the bottom with no through holes for dirt/grit to accumulate, providing a smooth working surface. The arm segments are made of stainless steel and 6061 aluminum.
The version 2 of the R.A.T. arm includes tooless quick change adjustments. (Pictures are of V1, pictures for V2 are forthcoming.)
price includes a 3% cash/check discount.
Tilting Stand
Why settle for just a vertical grinder? With the Northridge Tool Billet Tilting Stand you can transform your vertical grinder into a horizontal grinder with just a flick of a lever, giving you two grinders for the price one!
It is constructed of 6061 aluminum with a spring loaded locking handle and receiver that are nitride (heat treated) for wear and corrosion resistance. The stand features pivot bushings of carbon steel with bronze and Teflon coatings for a lifetime of smooth operation. The pivot pins are precision machined out of corrosion resistant 303 stainless steel.
To truly unleash the power of the tiling stand you’ll definitely want the R.A.T. Arm, for the most modular tooling rest available. Easily utilize every part of your tooling arm!
price includes a 3% cash/check discount.
Tooling Arm
Our tooling arms are 1 1/2” square 6061 aluminum.
price includes a 3% cash/check discount.
Contact Wheels
Our precision machined contact wheels start with a USA made billet of 6061 aluminum and we machine the bore and outer face in the same operation, just like our tracking and drive wheels, for the tightest tolerances and most concentric contact wheels on the market. We use oversized bearings to give extended working life, and are press fit with a center spacer eliminating the chance of bearing damage due to over-tightening the wheels.
The contact faces are vulcanized peroxide cured rubber, the most heat and abrasion resistant rubber you can get, with a durometer of 70. They are molded onto the face of the aluminum hub in the USA using our own custom molds.
Available in 10” diameter only at this time.
price includes a 3% cash/check discount.
Large work rest
The 1/4” thick steel Large Work Rest is 16” x 8” to allow for a much larger working area. The Large Work Rest is Black Nitride Treated for wear and corrosion resistance. It is tapped from the bottom with no through holes for dirt/grit to accumulate, providing a smooth working surface.
price includes a 3% cash/check discount.
Radius Work rest
The 1/4” thick steel Large Work Rest is 8” x 8” and is shaped on all four sides to use with the 10″ Contact Wheel and 3 different Small Wheel sizes. The Radius Work Rest is Black Nitride Treated for wear and corrosion resistance. It is tapped from the bottom with no through holes for dirt/grit to accumulate, providing a smooth working surface.
price includes a 3% cash/check discount.
Mini work rest
The 1/4” thick steel Mini Work Rest is 2” x 2” and is great for detail work and Slip Joint blades. The Mini Work Rest is Black Nitride Treated for wear and corrosion resistance. It is tapped from the bottom with no through holes for dirt/grit to accumulate, providing a smooth working surface.
price includes a 3% cash/check discount.
Slack Belt Platen
The Slack Belt Platen allows the belt to follow the shape and curves of the object you are working on. It is as large and deep as possible to allow for maximum work area. This Platen has no backing plate and features our 2 Inch Wheels.
Comes with its own 6061 aluminum tooling arm.
price includes a 3% cash/check discount.
Large platen
The Large platen offers our largest work station. Grind flat profiles, precise angles, notch and profile edges with ease. Remove the platen and it becomes an excellent slack belt attachment for de-burring and rounding edges.
Featuring 2” aluminum wheels made to the same precision and tolerances of our drive and tracking wheels.
The bolt on work rest gives solid support for grinding precise angles. This can be used for working with Large pieces and the platen is adjustable both ways.
Comes with its own 6061 aluminum tooling arm.
price includes a 3% cash/check discount.
Pyro Ceramic platen glass
The Pyro Ceramic Glass can be added to your Platen to provide a low friction surface for your belt to slide on. It holds up very well to heat and temperature changes. If this product is used incorrectly it can be dangerous. Please do your research and take all precautions when installing and using this product.
price includes a 3% cash/check discount.
Surface Grinder
Not yet, but we’re working on it! And trust us, it’s going to be every bit as nice as everything else we make, you’ll wonder how you ever lived without it. In the mean time, if you’re interested just drop us a line and let us know!
And
We have big plans for the future accessories. Our goal is to have the widest range of accessories available of any grinder on the market, so that we’re not only the best performing belt grinder available, but we’re also the most versatile.
What do we have planned? Well we don’t want to give away all of our surprises, but expect to see more contact wheel options, more tooling arm configurations, and other accessories. We promise you won’t be disappointed.
Got an idea for an accessory you’d like to see on your belt grinder? Let us know! We’re very interested in knowing what kind of accessories you are dreaming of having, and who knows, they might just become a reality.