Portable grinders. Purpose and types.
The portable grinder is a lightweight, hand-operated machine tool. It can be powered electrically or pneumatically, depending on the model selected. The portable grinder is used in the field or maintenance shop to grind excess metal from welds, remove rust, and for special finishing operations around the work area. Since this tool is hand operated, the quality of the work depends upon the ability and experience of the operator.
A small portable chuck type grinder may be known as a die grinder and is available with a number of accessories. These accessories include rotary files, small circular saws, wire brushes, assorted grinding wheels, and small sanding and polishing disks. These accessories are mounted to straight shank arbors which fit into the collect chuck of the grinder.
Special reduction collets are provided so that smaller diameter arbors or shanks can be mounted in the chuck. Operations performed with this portable grinder include shaping and smoothing intricate dies and castings, removing burrs from edges and surfaces, cleaning and repairing threaded parts, repairing keyways and splines, grinding bevels, countersinking holes and repairing scored and mutilated surfaces.
The portable grinder (wheel type) (Figure 2) can be electric or pneumatic and is designed for heavy-duty portable grinding operations. It is capable of mounting and rotating 6- inch-diameter grinding abrasive wheels and 6-inch-diameter wire brushes and polishing wheels. This grinder is used as a hand grinder for removing rust, corrosion, and sharp burrs from large workpieces (Figure 3).
Most portable grinders come with a grinder stand (Figure 4). Mounted on this stand, the grinder can be used to sharpen twist drills and cutter bits in the machine shop. Most grinders also come equipped with a wheel guard that should remain in place at all times to protect the operator from flying sparks and waste material. The portable grinder is designed so that the face of the grinding wheel is used; never use the side of the wheel or serious injury or damage could occur (Figure 5).
The angle grinder (disk type) (Figure 6) can be electric or pneumatic, and is designed for heavy duty grinding operations. The angle grinder consists of a depressed center abrasive grinding disk with wheel guard attached to the basic portable motor assembly (Figure 7). Care must be taken to check the wheel for cracks and to ensure that the wheel guard stays in place while operating.
Fig. 1- Portable electric grinder ( chuck type ) - Amoladora eléctrica portátil ( tipo mandril )
Fig. 2 - Portable grinders ( wheel type ) - Amoladoras portátiles ( tipo disco )
Fig. 3- Operation of portable pneumatic grinder - Operación de una amoladora neumática portátil
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Amoladoras portátiles. Propósitos y tipos .
La amoladora portátil es una máquina herramienta ligera y manual. Puede ser accionada eléctricamente o neumáticamente, dependiendo del modelo seleccionado. La amoladora portátil se utiliza en campo o en el taller de mantenimiento para amolar exceso de metal de soldaduras, quitar óxido, y para las operaciones de acabado especiales alrededor del área de trabajo. Puesto que esta herramienta es manual, la calidad del trabajo depende de la capacidad y de la experiencia del operador.
Un tipo portátil de amoladora pequeña de mandril puede ser conocida como rectificadora de matrices (también amoladora recta, amoladora de troqueles, amoladora de dados, etc ). y está disponible con un número de accesorios. Estos accesorios incluyen limas rotativas, pequeñas sierras circulares, cepillos de alambre, muelas abrasivas variadas, y pequeños discos de lijar y de pulir. Estos accesorios se montan en ejes de espigas rectas que caben en el mandril de la amoladora.
Se proporcionan pinzas portapiezas de reducción especiales para poder insertar ejes de espigas o vástagos de un diámetro más pequeños en el mandril. Las operaciones realizadas con esta amoladora portátil incluyen formar y alisar moldes y bastidores intrincados, remoción de rebabas de bordes y de superficies, la limpieza y reparación de piezas roscadas, reparación de chaveteras y acanaladuras, biseles amolados, avellanando de agujeros y reparación de superficies marcadas y mutiladas.
La amoladora portátil (tipo disco) (figura 2) puede ser eléctrica o neumática y se diseña para operaciones de pulido portátiles de gran potencia. Es capaz de insertar y de rotar discos abrasivos de 6 pulgadas de diámetro y discos de cepillado de alambre y discos de pulido de 6 pulgadas. Esta amoladora se utiliza en forma manual para quitar óxido, corrosión, y rebabas agudas de piezas de trabajo (figura 3).
La mayoría de las amoladoras portátiles vienen con un soporte de amoladora (figura 4). Montada en este soporte, la amoladora se puede utilizar para afilar brocas helicoidales y sacabocados en el taller de máquinas. La mayoría de las amoladoras también vienen equipadas con un protector de disco que debe permanecer en el lugar siempre para proteger al operador contra chispas voladoras y material de desecho. La amoladora portátil se diseña de manera de utilizar la cara del disco abrasivo; nunca utilice el filo del disco o podrían ocurrir serias lesiones o daños (cuadro 5).
La amoladora de ángulo (tipo disco) (figura 6 ) puede ser eléctrica o neumática, y se diseña para operaciones de pulido de gran potencia. La amoladora de ángulo consiste en un disco de pulido abrasivo de centro deprimido con el protector de disco fijado al montaje de motor portátil básico (figura 7). Se debe tener cuidado de comprobar el estado del disco para saber si hay grietas y para asegurarse de que el protector de disco permanece en el lugar mientras funciona.
Fig. 4 - Portable electric grinder ( wheel type ) with grinder stand - Amoladora eléctrica portátil ( tipo disco ) con soporte de amoladora.
Fig. 5- Correct and incorrect methods of using the portable grinder ( wheel type ) - Métodos correcto e incorrecto de uso de una amoladora portátil ( tipo disco )
Fig. 6- Angle grinders (disk type ) - Amoladoras angulares ( tipo disco ) |
Fig. 7- Configuration of an angle grinder (disk type ) - Configuración de una amoladora angular ( tipo disco )
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Kitchener #12 Electric Meat Grinder - 1/2 HP
$99.00
Powerful Kitchener #12 meat grinder processes up to 176 lbs. of meat per hour! Converts poultry, beef, vegetables and other ingredients into tasty sausage, meatloaf, sauces and more. Powerful 1/2 HP motor has forward and reverse switch for trouble-free operation. Capacity Per Hour (lbs.): 176, HP: 1/2, Watts: 350, Neck Size: #12, Volts: 110, Motor Speed - No Load (RPM): 1,725, Hopper Size (in.): 11 1/2 x 7 1/4 at wide end and 6 1/2 at smaller end, Inlet Diameter (in.): 2 1/2 at top and 1 3/4 at bottom, Outlet Diameter (in.): 2 1/2, Plate Diameter (in.): 2 3/4, Size of Plate Holes (in.): 3/16 (medium coarse), 5/16 (coarse), 3/8 (very coarse), Stuffing Tubes Included: 3, Overall Dimensions L x W x H (in.): 16 1/2 x 7 3/8 x 14 1/4, Discharge Pan Dimensions L x W x H (in.): 9 5/8 x 6 11/16 x 1 9/16 1/2 HP 350 Watt 110V motor On/off switch Reversible Includes stainless steel fine, medium and coarse cutting plates, stainless steel knife, 3 sausage stuffing tubes, kubbe attachment, meat pusher and feeding pan Internal parts are all metal for greater durability 2-pc. carbon steel gear Carbon steel shaft Carbon steel shaft Cast aluminum corkscrew Cast aluminum corkscrew Reverse switch [Read more]
Store: Northern Tool and Equipment
Brand: Kitchener
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Kitchener Electric Meat Grinder - #8 Stainless Steel, 3/8 HP
$279.98
Heavy-duty Kitchener electric meat grinder grinds over 240 lbs. of meat per hour. Capacity Per Hour (lbs.): 240, HP: 3/8, Watts: 250, Neck Size: #8, Volts: 120, Motor Speed - No Load (RPM): 240, Hopper Size (in.): Elliptical 11 13/16 x 7 29/32 x 4 5/16, Inlet Diameter (in.): 2, Outlet Diameter (in.): 2 13/32, Plate Diameter (in.): 2 13/32, Size of Plate Holes (in.): 3/16 (medium coarse), 3/8 (very coarse), Stuffing Tubes Included: Plastic 3/8in, 3/4in, 1 1/4in, Overall Dimensions L x W x H (in.): 19 3/8 x 8 5/16 x 13 5/8, Discharge Pan Dimensions L x W x H (in.): 9 13/32 x 8 3/4 x 1 5/8 Food-grade stainless steel housing, augers, blades, grinding plates, trays and necks for durability For indoor or outdoor use Includes fine and coarse grinding plates, meat pusher and 3 stuffing tubes [Read more]
Store: Northern Tool and Equipment
Brand: Kitchener
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Makita Angle Grinder - 4.5in. 10,000 RPM, 6.4 Amp, Model# 9557PB
$99.98
Wheel Diameter (in.): 4 1/2, Amps: 6.4, Speed (RPM): 10,000, Switch Type: Paddle switch, Spindle Thread Size: 5/8in. x 11, Side Handle: Yes, Variable Speed: No, Wheel Included: Yes, Wrench Included: Yes, Case Included: No Wire cup brush 3 1/2in. Sanding disc 4 1/2in. Extra-large paddle switch for easy operation right or left handed 115 Volts Small-circumference barrel grip Labyrinth construction seals motor and bearings from contamination [Read more]
Store: Northern Tool and Equipment
Brand: Makita
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Northern Industrial Replacement Wheel for Grinder Item# 143378 - Wire Wheel
$2.99
4 1/2in. diameter wire wheel with 5/8in. arbor for use with Northern Industrial grinder #143378. Wheel Diameter (in.): 4 1/2 [Read more]
Store: Northern Tool and Equipment
Brand: Northern Industrial Tools
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DEWALT Heavy-Duty Bench Grinder - 8in, 3/4 HP, Model# DW758
$139.99
The DEWALT 8in. 3/4 HP Heavy-Duty Bench Grinder has the power to handle daily commercial grinding applications. Wheel Diameter (in.): 8, Amps: 4.2, Speed (RPM): 3,600, HP: 3/4, Spindle Thread Size: 5/8, Variable Speed: No, Wheel Included: Yes, 36 & 60 Grit, Case Included: No 3/4 HP induction motor provides superior power for industrial grinding applications Rugged cast iron base and motor housing provide durability and prolonged life Motor runs at 3600 RPM for high speed material removal Precision-machined aluminum tool rests allow the user to accurately position work Rear exhaust ports in wheel guards for smoother operation 12 1/2in. distance between wheels for larger and longer grinding applications Rugged cast iron base and loader housing [Read more]
Store: Northern Tool and Equipment
Brand: Dewalt
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DEWALT Small Angle Grinder - 4 1/2in, 7 Amp, Model# D28110
$69.98
The DEWALT 7.0 Amp Small Angle Grinder boasts a 11,000 RPM motor for faster material removal and higher overload protection. Easy-to-control slim, ergonomic body design is ideal for grinding or cutting projects, including cutting metal and stone (with appropriate cutting wheel). Wheel Diameter (in.): 4 1/2, Amps: 7, Speed (RPM): 11,000, Switch Type: Paddle switch, Spindle Thread Size: 5/8in. x 11, Side Handle: Yes, Wheel Included: Yes, Wrench Included: Yes, Case Included: No Quick Change wheel release Low-profile Jam-Pot gear case 2-position removable side handle 5/8in-11 spindle thread accepts a wide range of 4 1/2in. accessories [Read more]
Store: Northern Tool and Equipment
Brand: Dewalt
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Kitchener Replacement Blade for #22 Electric Meat Grinder
$9.98
Kitchener replacement grinder blade is for #22 electric meat grinder (Item# 304452, sold separately). Neck Size: #22, Diameter (in.): 3 1/4, Compatible With Item Number (s): 304452 [Read more]
Store: Northern Tool and Equipment
Brand: Kitchener
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Kitchener Deluxe Meat Saw with Built-in Grinder - 1 HP
$499.98
Dress and prepare a freezer full of game with this Kitchener deluxe meat saw with built-in grinder. Powerful 1 HP 110V meat saw boasts a cutting capacity of 7 1/2in.W x 12 13/32in.H to handle large pieces of meat. Also comes equipped with built-in meat grinder. HP: 1, Volts: 110, Watts: 550, Max. Cutting Width (in.): 7 1/2, Max. Cutting Depth (in.): 12 13/32, Blade Size (in.): 77 1/2, Stuffing Tubes Included: Yes, Table Dimensions W x L (in.): 17 5/16 x 22 13/32, Overall Dimensions L x W x H (in.): 33 x 19 x 57 7/8 Table travel distance is over 8in. Cutterhead speed of 300-400 RPM Easy-to-clean stainless steel table Cabinet type stand with upper and lower blade guides Upper and lower aluminum wheels for smooth cutting operation [Read more]
Store: Northern Tool and Equipment
Brand: Kitchener
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Northern Industrial Replacement Blades For Electric Meat Saw/Grinder
$24.98
One saw blade and two grinder blades for use with our #168650 meat saw/grinder. Compatible With Item Number (s): 168650, Overall Dimensions L x W x H (in.): 82in.L x 5/8in.W [Read more]
Store: Northern Tool and Equipment
Brand: Northern Industrial Tools
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Replacement Grinder Blade For Item# 168610
$4.00
Replacement Grinder Blade For Item# 168610 Neck Size: #12, Diameter (in.): 2 3/4, Compatible With Item Number (s): 168610 [Read more]
Store: Northern Tool and Equipment
Brand: Northern Tool and Equipment
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Kitchener Replacement Blade for #12 Electric Meat Grinder
$9.98
Replacement grinder blade is for #12 electric meat grinder (Item# 151342, sold separately). Neck Size: #12, Diameter (in.): 2 3/4, Compatible With Item Number (s): 151342 [Read more]
Store: Northern Tool and Equipment
Brand: Kitchener
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Kitchener Replacement Blade for #12 Electric Meat Grinder
$9.98
Replacement grinder blade is for #12 electric meat grinder (Item# 151343, sold separately). Neck Size: #12, Diameter (in.): 2 3/4, Compatible With Item Number (s): 151343 [Read more]
Store: Northern Tool and Equipment
Brand: Kitchener
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Kitchener Replacement Blade for Item# 337989, #8 Electric Meat Grinder
$9.98
This Kitchener replacement blade is designed for use with Item# 337989, Kitchener #8 Electric Meat Grinder. Neck Size: #8, Diameter (in.): 2 1/2, Blade Material: Stainless steel, Compatible With Item Number (s): 337989 [Read more]
Store: Northern Tool and Equipment
Brand: Kitchener
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Replacement Grinder Blade For Item# 168618
$4.00
Replacement Grinder Blade For Item# 168618 Neck Size: #22, Diameter (in.): 3 1/4, Compatible With Item Number (s): 168618 [Read more]
Store: Northern Tool and Equipment
Brand: Northern Tool and Equipment
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Kitchener #22 Stainless Steel Electric Meat Grinder - 3/4 HP
$579.98
Kitchener heavy-duty stainless steel electric unit grinds up to 480 lbs. of meat per hour. Powered by a robust 3/4 HP 550 Watt 110V motor. Made of food-grade polished stainless steel for durability, easy cleaning and maintenance. Includes a stainless steel meat receiving tray, feeding pan, medium and coarse grinding blades, 2 stainless steel knives, meat pusher and 3 stuffing tubes. Capacity Per Hour (lbs.): 480, HP: 3/4, Watts: 550, Neck Size: #22, Volts: 110, Outlet Diameter (in.): 3 3/16, Plate Diameter (in.): 3 1/4, Size of Plate Holes (in.): 1/4 (medium coarse), 5/16 (coarse), Stuffing Tubes Included: 3, Overall Dimensions L x W x H (in.): 20 3/8 x 9 1/2 x 17 9/16, Discharge Pan Dimensions L x W x H (in.): 12 3/8 x 9 1/8 x 1 1/2 [Read more]
Store: Northern Tool and Equipment
Brand: Kitchener
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Replacement Grinder Blade For Item# 508315
$3.00
Replacement Grinder Blade For Item# 168630 Neck Size: #32, Diameter (in.): 3 7/8, Compatible With Item Number (s): 508315, 168630 [Read more]
Store: Northern Tool and Equipment
Brand: Northern Tool and Equipment
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Northern Industrial #22 Electric Stainless Steel Meat Grinder - 3/4 HP
$449.98
This Northern Industrial #22 Electric Stainless Steel Meat Grinder grinds up to 480 lbs. per hour. Polished stainless steel for easy cleaning and maintenance. 110 Volt/550 Watts. Includes stainless steel meat receiving tray. Overall dimensions: 16 1/6in. L x 9 3/8in. W x 17 3/4in. H. Capacity Per Hour (lbs.): 480, HP: 3/4, Watts: 750, Neck Size: #22, Volts: 110, Outlet Diameter (in.): 3 3/16, Plate Diameter (in.): 3 1/4, Size of Plate Holes (in.): 3/16 (medium coarse), 1/4 (coarse), Compatible With Item Number (s): 1686180, Overall Dimensions L x W x H (in.): 16 1/6 x 9 3/8 x 17 3/4, Discharge Pan Dimensions L x W x H (in.): 12 3/8 x 9 1/8 x 1 1/2 [Read more]
Store: Northern Tool and Equipment
Brand: Northern Industrial Tools
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Northern Industrial Air Mini Angle Die Grinder - 1/4in. Inlet, 4 CFM, 20,000 RPM
$34.99
This grinder allows easy handling in confined areas. Can use carbide burrs and other attachments for polishing, porting and removing light metal. Features a power/speed regulator for easy RPM adjustment and a twin-bearing spindle to reduce vibration. Durable, lightweight composite housing design also helps reduce vibration. Disc Diameter (in.): 2, Air Consumption (CFM): 4, Speed (RPM): 20,000, Air Inlet Size (in. NPT): 1/4, Min. Hose Size (in.): 3/8, Collet Size (in.): 1/4, Variable Speed: Yes, Side Handle: No, Tool Length (in.): 6 Ergonomic cushion grip Adjustable rear exhaust Includes spanner wrenches [Read more]
Store: Northern Tool and Equipment
Brand: Northern Industrial Tools
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Northern Industrial Air Mini Die Grinder - 1/4in. Inlet, 4 CFM, 25,000 RPM
$27.98
This 6in. air die grinder is ideal for light weld, grinder, porting and polishing applications. Features a spindle concentricity of less than .05mm, a power/speed regulator for easy RPM adjustment and a twin-bearing spindle to reduce vibration. Durable, lightweight composite housing design also helps reduce vibration. Disc Diameter (in.): 6, Air Consumption (CFM): 4, Speed (RPM): 25,000, Air Inlet Size (in. NPT): 1/4, Min. Hose Size (in.): 3/8, Collet Size (in.): 1/4, Variable Speed: Yes, Side Handle: No Ergonomic cushion grip Adjustable rear exhaust Includes spanner wrenches [Read more]
Store: Northern Tool and Equipment
Brand: Northern Industrial Tools
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Wilton Square Wheel Belt Grinder, Model# 4103
$2,999.98
The Wilton multipurpose Square Wheel Belt Grinder provides fast, efficient grinding and finishing all in one machine: Flat and angular stock, shaping, roughing and contouring. U.S.A. Product image is representational only; stand shown is sold separately (Item# 144548) Application: Provides fast, efficient grinding and finishing all in one machine, Compatible With Item Number (s): 144549, Belt Size (in. x in.): 72 x 2, Belt Speed (ft./min.): 4,600 SFPM, Motor Phase(s): 115/230V single-phase motor, Wheel Size (in.): 8, Wheel Included: Yes, Includes: 1 Grinder Flat & Angular Stock: Platen setting is the perfect angle for high speed, precision flat and level grinding Shaping: For grinding and refinishing cylindrical shapes The yoke surface conforms to the shape of the surface to produce an even, smooth finish Roughing: Serrated contact wheel for removing heavy stock, cleaning a weld or snagging casting Contouring: Grind difficult-to-reach areas with the 3in. x 2in. or 1 1/2in. x 2in. dia. contact wheels Puts a satin finish on steel, iron or aluminum and performs intricate contouring or internal finishing on uniquely shaped parts Contact wheel durometer: 70 Stand (Item# 144548) sold separately [Read more]
Store: Northern Tool and Equipment
Brand: Wilton
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Northern Industrial Air Die Grinder - 1/4in. Inlet, 3 CFM, 22,000 RPM, 90 PSI
$34.99
Ideal for many automotive and industrial high-speed grinding applications. It can be used to clean dies, rotors, backing plates and brake pad mounts, or to grind valve seats, dress welds and enlarge holes. Features a spindle concentricity of less than .05mm, a power/speed regulator for easy RPM adjustment and a twin-bearing spindle to reduce vibration. Durable, lightweight composite housing design also helps reduce vibration. Can be used with 1/4in. grinding accessories. Disc Diameter (in.): 1/2, Air Consumption (CFM): 3, CFM at Load: 3, Speed (RPM): 22,000, Air Inlet Size (in. NPT): 1/4, Min. Hose Size (in.): 3/8, Collet Size (in.): 1/4, Side Handle: No, Tool Length (in.): 7 Ergonomic cushion grip Adjustable rear exhaust Includes spanner wrenches [Read more]
Store: Northern Tool and Equipment
Brand: Northern Industrial Tools
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Makita Angle Grinder - 5in. 11,000 RPM, 10.5 Amp, Model# GA5020
$157.99
This grinder sports the Super Joint System to prevent kickback and gear damage from accidental wheel binding. Grinder head rotates 90 left or right for your convenience. Wheel Diameter (in.): 5, Amps: 10.5, Speed (RPM): 11,000, Switch Type: Trigger with lock-on switch, Spindle Lock: Yes, Side Handle: Yes, Variable Speed: No, Wheel Included: Yes, Wrench Included: Yes, Case Included: No Electric brake Can run on both AC and DC power Dustproof ball bearing construction Externally accessible brushes Spiral gears for efficiency Max Wheel Size: Grinding Wheel 5in. Wire Cup Brush 3-1/2in. Sanding Disc 5in. [Read more]
Store: Northern Tool and Equipment
Brand: Makita
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Makita Angle Grinder - 7in. Dia, 6000 RPM, 15 Amp, Model# GA7001L
$229.99
Wheel Diameter (in.): 7, Amps: 15, Speed (RPM): 6,000, Spindle Thread Size: 5/8, Spindle Lock: Yes, Side Handle: Yes, Variable Speed: No, Wheel Included: Yes, Case Included: No AC/DC switch for use with alternative power source All ball-and-needle bearings for long life [Read more]
Store: Northern Tool and Equipment
Brand: Makita
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Operations with portable grinders.
Before operating any portable grinder, check the grinding wheel for cracks and check that the arbor hole is the proper size for the grinder to be used. When operating these grinders, keep a light pressure on the work to avoid damaging the wheel or overheating the workpiece.
Both the small and the larger portable grinders operate at a high speed, so avoid letting the wheel rest on one spot for too long. This could cause the work to burn or the wheel to crack and explode. Always check the manufacturer’s instruction manual before operation to ensure the grinding wheel’s maximum rated speed is rated higher than the maximum speed of the grinder.
When grinding, buffing, or polishing with any portable grinder, always keep a firm grip on the tool to avoid injury or damage to equipment.
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Operaciones con amoladoras portátiles.
Antes de hacer funcionar cualquier amoladora portátil, compruebe el estado del disco abrasivo para saber si hay grietas y compruebe que el agujero de las pinzas portapiezas o agujero del eje es del tamaño apropiado para que la amoladora sea utilizada. Al hacer funcionar estas amoladoras, mantenga una presión ligera sobre el objeto de trabajo para evitar dañar el disco o recalentar dicho objeto.
Tanto las amoladoras portátiles pequeñas y como las más grandes funcionan a alta velocidad, así que evite dejar la rueda apoyarse sobre un punto durante demasiado tiempo. Esto podría hacer que el objeto de trabajo se queme o que el disco se agriete y estalle. Compruebe siempre el manual de instrucciones del fabricante antes de que la operación, para asegurarse que la velocidad máxima permitida del disco abrasivo se encuentre por encima que la velocidad máxima de la amoladora.
Cuando realice el amolado, lustre, o pulido con cualquier amoladora portátil, mantenga siempre una presión firme en la herramienta para evitar cualquier lesión o daño al equipo. |
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