optimization of replaced grinding wheel diameter for surface

  • optimization of replaced grinding wheel diameter for

    Optimization of Replaced Grinding Wheel Diameter for

    PDF | This paper shows an optimization study on calculating the optimum replaced wheel diameter in internal grinding of stainless steel. In this work, the effects of the input factors, including

  • optimization of grinding efficiency considering surface

    Optimization of grinding efficiency considering surface

    The rough grinding speed is 5 μm/s and the finishing speed is 1 μm/s and the polishing time is 7 s. With this group of grinding parameters, the roughness of the grinding surface is 0.26 μm, and the physical properties of the grinding surface are satisfactory. Empirical method comes from bearing manufacturer.

  • grinding theory and adaptive control optimization

    Grinding Theory and Adaptive Control Optimization

    The abrasive grains of the grinding media represent thousands of tiny cutting edges that remove metal from the surface of the workpiece. As pressure is applied between the workpiece and grinding wheel, normal and tangential forces are generated. These forces cause the grain to cut into the workpiece and remove metal in the form of chips.

  • experimental study of newly structural design grinding

    Experimental study of newly structural design grinding

    The grinding process has a great advantage during machining structures in brittle and hard materials. Under this circumstance, the new grinding wheel – cutting surface of grinding – was structurally re-designed, which enables to produce and apply any size of grinding tools.

  • optimization of parameters in cylindrical and surface

    Optimization of parameters in cylindrical and surface

    May 30, 2018· The grinding wheel speed, grinding wheel grade, depth of cut, grinding wheel material and feed rate are the important parameters that affect the surface finish, which in turn affects the productivity and cost of the component. The grinding parameters used for both surface and cylindrical operations are tabulated in table 1.

  • optimization of grinding parameters for minimum surface

    Optimization of Grinding Parameters for Minimum Surface

    Optimization of Grinding Parameters for Minimum Surface Roughness by Taguchi Parametric Optimization Technique International Journal of Mechanical and Industrial Engineering (IJMIE), ISSN No. 2231 –6477, Volume-1, Issue-3, 2012

  • luu anh tung | thainguyen university of technology

    Luu Anh Tung | Thainguyen University of Technology

    Based on a cost analysis, a method of identifying and predicting optimum replaced grinding wheel diameter (De.op) in a surface grinding operation for 9CrSi steel material was developed in this study.

  • grinding wheel speed calculator | norton abrasives

    Grinding Wheel Speed Calculator | Norton Abrasives

    All Norton grinding wheels are marked with a maximum operating speed in RPM. Most machines, and especially CNC machines, use Surface Feet Per Minute (SFPM) as an input, which requires operators to do the conversion. This calculator will do this by inputting the wheel diameter in either English units or metric, then inputting the RPM to

  • optimization of grinding process parameters using

    Optimization of grinding process parameters using

    Grinding wheel speed. • Dress condition. For finish grinding, surface finish is an important consideration. If the process generates a finish value better than desired, it only adds to the cost of grinding. As such, surface finish has been taken to be a process constraint for

  • how to read a grinding wheel spec - a a abrasives inc

    How to Read a Grinding Wheel Spec - A A Abrasives Inc

    Diameter of grinding wheel x Thickness of grinding wheel x size of arbor hole - We will reference the AA Abrasives #60397 - 12x2x1-1/4 Pedestal Gri How to Read a Grinding Wheel Spec JavaScript seems to be disabled in your browser.

  • [pdf]<h2>optimization of surface grinding process parameters by

    [PDF]

    Optimization of Surface Grinding Process Parameters By

    method was used for optimization. Thirteen experiments were conducted in the surface grinding machine. The surface roughness values were entered in the Design Expert software and the optimal solution was obtained. Both methods showed that wheel grain size and depth of cut influences the surface roughness a lot.

  • optimization of internal grinding process parameters on

    Optimization of Internal Grinding Process Parameters on

    forces which are caused by the finer grinding wheel surface and investigation was carried out on the wear rate of CBN grinding wheels [27, 28]. Based on the above study, an attempt was made in optimization of internal grinding process parameters on C40E steel using taguchi technique and the

  • optimization of cylindrical grinding parameters

    OPTIMIZATION OF CYLINDRICAL GRINDING PARAMETERS

    In this paper, minimize the surface roughness (Ra) by taguchi optimization technique. The universal tool and cutter grinding machine with aluminium oxide abrasive wheel used for investigation. The workpiece material is used for this investigation is EN 24, EN 31 and Die steel.

  • optimization of grinding operation

    Optimization of grinding operation

    Optimization of grinding operation With grinding operation we can achieve various objectives such as surface very well finished, or high accuracy, or tend to a better cutting capacity in order to remove a large amount of material in less time. But you can also find the conditions for

  • review of analysis & optimization of cylindrical grinding

    Review of Analysis & Optimization of Cylindrical Grinding

    Review of Analysis & Optimization of Cylindrical Grinding Abstract: Grinding process is surface finishing process generally used to smoothen the surfaces by removing table feed, depth of cut, material hardness, grinding wheel grain size, no. of passes and material removal rate. Work piece Speed and feed rate are very important factor

  • ijrmet v . 3, i 2, m - o 2013 optimization of process

    IJRMET V . 3, I 2, M - o 2013 Optimization of Process

    experiment was 75mm x 38mm x 20mm. The Grinding Wheel is made up of Al2O3 (A60L5V) Grinding wheel size: 350mm OD X 40mm width X 127 mm ID.A schematic diagram of the experimental set-up used in this study is shown in Fig. 1. The responses considered in this study are surface roughness and material removal rate.

  • modeling and optimization of surface roughness

    MODELING AND OPTIMIZATION OF SURFACE ROUGHNESS

    wheel diameter in mm. The grinding wheel topology was too irregular to be characterized by random cutting edge’s spacing and protrusion height in the gr inding process. Snoeys et al. [4] and Kedrov [5] proposed the empirical model of surface rough ness using grinding experiments and it is given as ERIAL 311-2 is a cycloid is the

  • optimization cutting parameters when grinding Шx15

    OPTIMIZATION CUTTING PARAMETERS WHEN GRINDING ШX15

    Study on grinding field focus in the large of the range.In which, study on optimising the cutting parameters had done by many authors: Optimization value of depth of cut, velocity of workpiece, grinding wheel speed and numberof passes when grinding AISI 5120 by Al2O3grinding wheel[1]; Optimization value of depth of cut, velocity of workpiece, grinding wheel speed when grinding EN24 steel byAl2O3grinding

  • [pdf]<h2>experimental analysis & optimization of cylindirical

    [PDF]

    Experimental Analysis & Optimization of Cylindirical

    grinding wheel speed, work piece speed, table feed rate and depth of cut were the significant factors for the surface roughness and material removal rate. Surface roughness is minimum at 2000 r.p

  • precision grinding wheels | norton abrasives

    Precision Grinding Wheels | Norton Abrasives

    Norton surface grinding wheels and segments are a universal choice for heavy, rapid stock removal and production work to precision tolerance operations. Our surface grinding wheels come in a variety of abrasive grain types and bonds and can increase grinding performance anywhere from 100-600%.

  • [pdf]<h2>abrasive wheel illustrations notes - lni.wa.gov

    [PDF]

    Abrasive Wheel Illustrations Notes - lni.wa.gov

    An abrasive wheel that is similar to a Type 1 wheel, but the center of the wheel around the mounting hole is pushed back (depressed). Sometimes called a “depressed center” wheel. It has diameter (D), thickness (U) and hole size (H) dimensions. The depressed center allows grinding on the flat surface of the wheel without interference

  • surface grinding wheels - cut-off and grinding wheels

    Surface Grinding Wheels - Cut-Off and Grinding Wheels

    Surface grinding wheels are abrasive wheels that remove material from metal, wood, glass, and other surfaces more efficiently than hand sanding. Sometimes called surface grinders, they are used in conjunction with stationary and portable grinders and covered in an abrasive grit designed to grind specific surfaces.

  • [pdf]<h2>optimization of surface roughness in cylindrical grinding

    [PDF]

    Optimization of Surface Roughness in Cylindrical Grinding

    Cylindrical grinding is a process used to finish grind the outside or inside diameter of a cylindrical part. Cylindrical grinding produces a high quality finish and excellent accuracy and is usually a standard requirement for high accuracy parts. Cylindrical grinding can be carried out by traversing the

  • surface grinding wheels

    Surface Grinding Wheels

    Discover Grinding & Cutoff Wheels and other Grinding & Cutoff at MSC Industrial Supply. Over 1 million products that ship and deliver fast. Wheel Diameter: Hole Size: Wheel Thickness: Surface grinding wheels, also known as toolroom wheels, are used for stock removal, general purpose grinding applications, or preparing a workpiece for

  • bench grinder replacement wheels - sharpenatool

    Bench Grinder Replacement Wheels - Sharpenatool

    May 13, 2017· 6″ Bench Grinding Wheel 60 Grit- 6 Inch X 3/4 Inch X 1/2 Inch. The grinding wheel is a bonded Aluminium Oxide of a medium grit abrasive. A replacement wheel for bench grinders with a maximum speed of 4200 revs/minute. It is 6 inches diameter, 0.75 inches wide and has a

  • [pdf]<h2>optimization of cylindrical grinding

    [PDF]

    OPTIMIZATION OF CYLINDRICAL GRINDING

    Prediction and Optimization of Cylindrical Grinding Parameters for Surface Roughness Using Taguchi Method Quality of the surface depends on the size and shape of the workpiece used. After conducting experiment, it is optimized by S / N ratio and analyzed by ANOVA and reported that good surface finish occurs at high grinding wheel

  • optimization of cylindrical grinding process

    OPTIMIZATION OF CYLINDRICAL GRINDING PROCESS

    The grinding machine used in this study was Weldon AGN5 Cylindrical Grinding Machine. The grinding wheel used was vitreous bond CBN. He concluded that, during high speed grinding experiments of both zirconia and M2 steel, normal and tangential forces tend to lessen as the grinding wheel speed increases, but the surface finish is increases.

  • multi criteria optimization approach for dressing of

    Multi Criteria Optimization Approach for Dressing of

    topography of the working surface of the grinding wheel [4]. In this study, a vitrified diamond grinding wheel of diameter 150 mm is dressed under oil -mist lubrication. 3D Laser scanning microscope is used for the visualization and measurement of dressed area and overlapped dressed area of grinding wheel surface (refer to Fig. 3(a)-(b)). In this

  • a study on cost optimization of internal

    A STUDY ON COST OPTIMIZATION OF INTERNAL

    the grinding wheel diameter. Based on the calculated results, the influences of grinding parameters are evaluated and the function of optimal exchanged grinding wheel diameter is established. This relation of optimal exchanged grinding wheel diameter and grinding parameters can be used to conduct the real grinding experiments. 2.

  • cumi the solution provider to bearing industries include 1

    CUMI the solution provider to Bearing industries include 1

    Internal grinding is a process of enlarging the inside diameter of the component to an accurate size and desired finish Inner ring track grinding is a type of cylindrical grinding where grinds the outside track of Bearing, inner ring and it revolves between centers and held in a carbide shoes Types of Internal grinding: 1.Traverse grinding

  • 3m superabrasive wheels for cutting tools

    3M Superabrasive Wheels for Cutting Tools

    Grinding wheel is too soft Change to a harder or thicker wheel. Increase wheel speed so it will act harder. 2.tch Wheel Size (OD) to the Ma Equipment Capabilities Diamond Wheels Smaller diameter wheels can be run at higher RPM to achieve the recommended surface speed (sfpm or mps). This helps utilize more of the available horsepower.

  • grinding wheel

    Grinding Wheel

    Wheels of this form vary greatly in size, the diameter and width of face naturally depending upon the class of work for which is used and the size and power of the grinding machine. Cylinder or wheel ring Cylinder wheels provide a long, wide surface with no center mounting support (hollow). They can be very large, up to 12" in width.

  • [pdf]<h2>a review on optimization of machining parameters in

    [PDF]

    A Review on Optimization of Machining Parameters in

    Response surface methodology are used to predict the wheel vibrations and surface roughness in the external grinding of hardened AISI 8620 steel. A. Experimental Setup Work material: AISI 8620 steel in the form of round with stepped diameter 40 mm for the length of 50 mm and 60 mm diameter for the remaining length of 350 mm. There

  • modeling and simulation of grinding processes based on a

    Modeling and simulation of grinding processes based on a

    Modeling and simulation of grinding processes based on a virtual wheel model and microscopic interaction analysis by Xuekun Li A Dissertation influencing each other. In the process, the grinding wheel surface contacts the workpiece at high speed and under high pressure. The complexity of the process lies in the multiple

  • cost optimization of external cylindrical grinding

    Cost Optimization of External Cylindrical Grinding

    This paper introduces a study on cost optimization of external cylindrical grinding. The effects of many grinding process parameters such as the initial grinding wheel diameter, the wheel life, the total dressing depth as well as the effect of cost components including the machine cost, the labor including overhead cost, the grinding wheel cost and so forth were taken into account.

  • [pdf]<h2>optimization of surface roughness in cylindrical grinding

    [PDF]

    Optimization of Surface Roughness in Cylindrical Grinding

    Cylindrical grinding is a process used to finish grind the outside or inside diameter of a cylindrical part. Cylindrical grinding produces a high quality finish and excellent accuracy and is usually a standard requirement for high accuracy parts. Cylindrical grinding can be carried out by traversing the

  • grinding wheels. how to install grinding wheels &

    GRINDING WHEELS. HOW TO INSTALL GRINDING WHEELS &

    This video describes the installation of a grinding wheel on a surface grinder. Since the replacement was required because of a big crunch! We will also be looking at how to verify that the

  • online conversion - surface speed of a wheel

    Online Conversion - Surface Speed of a Wheel

    The radius is 1/2 the diameter of the wheel. The RPM (revolutions per minute) is of the wheel, not the engine. Change units to that of the radius. ie foot, meter, inch, etc.

  • bench grinder replacement wheels - sharpenatool

    Bench Grinder Replacement Wheels - Sharpenatool

    May 13, 2017· The grinding wheel is a bonded Aluminium Oxide of a medium grit abrasive. A replacement wheel for bench grinders with a maximum speed of 4200 revs/minute. It is 6 inches diameter, 0.75 inches wide and has a 0.5 inch arbor mounting. See the latest price of 6″ Bench Grinding Wheel 60 GritClick here . Forney 72405 Bench Grinding Wheel, Vitrified with 1-Inch Arbor, 80-Grit,

  • [pdf]<h2>optimization of cylindrical grinding

    [PDF]

    OPTIMIZATION OF CYLINDRICAL GRINDING

    Prediction and Optimization of Cylindrical Grinding Parameters for Surface Roughness Using Taguchi Method Quality of the surface depends on the size and shape of the workpiece used. After conducting experiment, it is optimized by S / N ratio and analyzed by ANOVA and reported that good surface finish occurs at high grinding wheel

  • multi criteria optimization approach for dressing of

    Multi Criteria Optimization Approach for Dressing of

    topography of the working surface of the grinding wheel [4]. In this study, a vitrified diamond grinding wheel of diameter 150 mm is dressed under oil -mist lubrication. 3D Laser scanning microscope is used for the visualization and measurement of dressed area and overlapped dressed area of grinding wheel surface (refer to Fig. 3(a)-(b)). In this

  • international journal of engineering research and general

    International Journal of Engineering Research and General

    In industries, the prime objective in grinding process is to get a better surface finish or to get high material removal rate (MRR) of the work piece. Better surface finish can be obtained by using fine grained grinding wheel whereas higher MRR can be obtained from the coarse grained grinding wheel.

  • electrogrip grinding wheels and cutting tools

    Electrogrip Grinding Wheels and Cutting Tools

    • Grinding wheel speeds • Grinding fluids Optimization of the grinding process with respect to these factors will increase the performance of the CBN wheel and lower the overall grinding costs. Machine Tool Quality • Rigidity • Accuracy of feed systems • Adequate power • Fluid delivery and filtration

  • evaluation and selection of diamond wheel grit

    EVALUATION AND SELECTION OF DIAMOND WHEEL GRIT

    use of diamond wheel grit size in an grinding operation. Diamond wheels with different grit size are used for milling operation. The parameters (Cycle time, Surface finish) are measured or noted down and optimized grit size for different parameters is determined by using Design Of Experiment Technique. The one with the least

  • effects of grinding parameters on surface quality in

    Effects of grinding parameters on surface quality in

    The Si 3 N 4 grinding experiment was performed on a CNC high precision surface grinding machine MGK7120×6/F, using a water-based grinding fluid and a resin-bonded diamond grinding wheel with a size of ϕ200 mm×ϕ32 mm×15 mm. Fig. 1 shows the grinding experimental system. The grinding force was measured using a piezoelectric dynamometer Kistler9257B.

  • 19 the cbn wheel in bearing grinding|newdiamondtools

    19 The CBN wheel in bearing grinding|Newdiamondtools

    May 28, 2019· The grinding experimental equipment uses CNC bearing inner diameter grinding machine of 3MZK208A. The coolant is water based emulsion. German Marsurf PSI instrument is used for the surface roughness test. Observe the structure of the grinding wheel with FEI QUANT 200 scanning electron microscope. 2 Results and analysis. 2.1 The effect of

  • [pdf]<h2>optimization of surface roughness in cylindrical grinding

    [PDF]

    Optimization of Surface Roughness in cylindrical grinding

    responses surface roughness and surface roundness. The surface quality produced in cylindrical grinding is influenced by various parameters given as follows (i) Wheel parameters: abrasives, grain size, grade, structure, binder. (ii) Process parameters: wheel speed, depth of cut, work speed.

  • abrasive wheel illustrations notes - lni.wa.gov

    Abrasive Wheel Illustrations Notes - lni.wa.gov

    An abrasive wheel that is similar to a Type 1 wheel, but the center of the wheel around the mounting hole is pushed back (depressed). Sometimes called a “depressed center” wheel. It has diameter (D), thickness (U) and hole size (H) dimensions. The depressed center allows grinding on the flat surface of the wheel without interference

  • 3m precision grinding & finishing 3m conventional grinding

    3M Precision Grinding & Finishing 3M Conventional Grinding

    3M™ GRINDING WHEELS 28 3M™ CUBITRON™ II VITRIFIED WHEELS 30 pends on the abrasive grit size, but also on the grinding and dressing method. Coarsely dressed grin-ding wheels yield higher perfor-mance, but also produce a rougher surface. When grinding profiles or small radii, the particle size has a direct influence on the selection

  • optimization of segmented grinding wheel matrix based on

    Optimization of Segmented Grinding Wheel Matrix Based on

    It is different from the traditional integrated super high-speed grinding wheel, the centrifugal force has greater impact on segmented grinding wheel in super high-speed rotation. In this paper, in order to ensure the safety of super high-speed grinding wheel, models for the connection between inner micro-unit’s displacement and stress of wheel matrix were established to optimize high-speed

  • surface grinder | machinemfg

    Surface Grinder | MachineMfg

    The wheel frame can be used for lateral intermittent feed movement along the dovetail guide of the slide. The sliding seat can be vertically intermittently fed along the guide rail of the column, and the workpiece is ground by the grinding wheel, and the grinding precision is high. ② Vertical shaft round table surface

  • what type of wheel is best suited for grinding hss m2?

    What type of wheel is best suited for grinding HSS M2?

    After many hours of researching. I had reached the conclusion that I needed a CBN wheel for grinding HSS in my surface grinder. I contacted a company called Eagle Superabrasives. They specialize in CBN and Diamond wheels. They agreed a CBN wheel is what I need for grinding HSS however felt my

  • ask the grinding doc: decrease diameter, increase speed

    Ask The Grinding Doc: Decrease diameter, increase speed

    The wheels start at 18" and stub-out at 15". Should I increase the rpm as the wheel diameter gets smaller? The Doc Replies: If you want more consistent grinding, maintain a constant surface speed. The basic equation is: new rpm = original rpm × original diameter ÷ current diameter.

  • [pdf]<h2>i optimization of cylindrical grinding

    [PDF]

    i OPTIMIZATION OF CYLINDRICAL GRINDING

    OPTIMIZATION OF CYLINDRICAL GRINDING PARAMETER FOR THE HIGH 2.4.2 Grinding Wheel 2.4.3 Coolant System 9 10 10 11 2.5 TYPE OF CYLINDRICAL GRINDING 2.5.1 Outside diameter grinding 2.5.2 Inside diameter grinding 2.5.3 Centerless grinding 12 12 13 14 2.6 TYPES OF ABRASIVES 15 2.7 GRINDING WHEEL 16 2.8 GRINDING PROCESS 2.8.1 Speed of grinding

  • icmiee-pi-1401910 000 optimization of grinding parameters

    ICMIEE-PI-1401910 000 Optimization of Grinding Parameters

    grinding spindle drive speed 50Hz/150, power rating 3.7 KW. Aluminum grinding wheel- WA36G5VBE is used as grinding wheel. Dioxol.M used as cutting fluid. The various process parameters of a surface grinding machine include depth of cut, material hardness, and work piece speed, grinding wheel grain size, and grinding wheel speed.

  • grinding wheel use & precautions fault finding and

    Grinding Wheel Use & Precautions Fault Finding and

    After dressing, clean wheel surface with stiff-bristled brush. Contamination by coarse grits or foreign matters: Dress or replace wheel. Flanges loose: Insert blotters between wheel surface and flanges and tighten screws evenly. Organic wheel deteriorated: Do not use solution-type coolant. Prevent rise in coolant temperature with cooling system

  • [pdf]<h2>surface dressing of grinding wheels

    [PDF]

    SURFACE DRESSING OF GRINDING WHEELS

    entire grinding surface. If surface dressing is done during grinding, correct selection of the dressing parameters is important. Dressing depth depends on the grit size in the grinding wheel, and is the same for all types of dressing tools. Grit size according to FEPA Dressing depth a (mm) 46 0.35 60 0.30 80 0.25 120 0.10 150 0.08 220 0.06 320 0.03 400 0.02

  • cutting tool applications chapter 16: grinding wheels and

    Cutting Tool Applications Chapter 16: Grinding Wheels and

    Cutting Tool Applications Chapter 16: Grinding Wheels and Operations. Grinding wheel speed: Wheel speed affects the bond and grade selected for a given wheel. Wheel speeds are measured in surface feet per minute (SFPM). Vitrified bonds are commonly used to

  • wire brushes, grinding wheels, and flap discs, oh my!

    Wire brushes, grinding wheels, and flap discs, oh my!

    Bonded abrasive cutting wheels are also designed for use perpendicular (90 degrees) to the work surface for best performance and longevity. Grinding wheels and flap discs are designed for use at 5 to 35 degrees in general. When selecting a flap disc, choose Type 27 for finishing and applications that require lower grinding angles—5 to 15 degrees.

  • section 3 units 5 and 6 flashcards | quizlet

    Section 3 Units 5 and 6 Flashcards | Quizlet

    Section 3 Units 5 and 6. STUDY. PLAY. Blotter. round disc of heavy paper surrounding the center area of a grinding wheel. Grit. Grain size; the measurement of the degree or coarseness of grinding wheel abrasives in which the lower the number, the coarser the wheel; grain sizes range from 8 to 600 process of finishing a hole to a precise

  • grinding wheels & discs

    Grinding Wheels & Discs

    Grizzly Industrial®, Inc. is a national retail and internet company providing a wide variety of high-quality woodworking and metalworking machinery, power tools, hand tools and accessories. By selling directly to end users we provide the best quality products at the best price to professionals and hobbyists.

  • a predictive model on surface roughness during internal

    A predictive model on surface roughness during internal

    The surface roughness of nozzles has important influence on the quality of fuel atomization. The diameter of nozzles in aero engine is generally less than 1 mm. Because of the smaller diameter of the grinding wheel used, its stiffness is poor and thus the wheel tends to deflect under the grinding

  • [pdf]<h2>grinder i. competencies c. ii. a.

    [PDF]

    Grinder I. Competencies C. II. A.

    diameter. Replace the wheel when worn to ½ of the original diameter. When the grinding wheel is worn to the paper washer it should be replaced. 10. Do not grind on the side of a grinding wheel. 11. Do not wear gloves, loose fitting clothing or jewelry which may get caught between the grinding wheel and tool rest when grinding. 12.

  • constraint-limited optimization of machining

    CONSTRAINT-LIMITED OPTIMIZATION OF MACHINING

    2.2 Techniques for Modeling and Optimization of Grinding Processes 10 3.4.6 Grinding Wheel Surface Topography Evolution 74 3.5 Conclusions 81 Table 4.1: Power capacity per unit width of wheel as a function of wheel diameter and speed [141] 87 Table 4.2: Grinding power as a function of feed rate and workpiece speed

  • grind wheel sizes - georgia grinding wheel

    Grind Wheel Sizes - Georgia Grinding Wheel

    Typical Grinding Wheels Sizes And Shapes Available From Stock TYPICAL GRINDING WHEEL SIZES These are common wheel sizes available from stock in various grades (Different grit types, sizes, hardnesses, bonds, etc.) depending on your specific application.