grinding machine hp push button

high speed hydrostatic centerless grinding machine | topking technology co., ltd

high speed hydrostatic centerless grinding machine | topking technology co., ltd

Hydrostaticbearingsupports GW & RWspindles and Hydrostaticguide-way is incorporatedinto Regulating wheellower slide in order to gethigh reliability.Push-button operation for size control is standard accessories.Hydrostatic bearing offer advantages as follow:-No abrasion-Extremely low friction and low temperature rise-High oil film stiffness independent on the number of rotation-Open side support is applied forprecise and constant rotating accuracy.SPECIFICATIONSH-4515-NCGrinding CapacityStandard grinding range (Dia.)1~75 mmMax Infeed Length150 mmGrinding WheelGrinding wheel size (O.D. x width x I.D.)455 x 150 x 228.6Grinding wheel speed45 m/secRegulating WheelRegulating wheel size (O.D. x width x I.D.)255 x 150 x 127Regulating wheel speed10 ~ 300 R.P.M. (Variable)Regulating wheel tilt angle+5 ~-3Regulating wheel swivel angle5Handwheel GraduationUpper slide feed graduation0.4 mm//rev. 0.02mm/graduationLower slide feed graduation6 mm//rev. 0.01mm/graduationTrimming device graduation2 mm//rev. 0.01mm/graduationX-axis Min. Input Increment0.0005 mmDrive MotorsGrinding Wheel Motor7.5 HP x 4PRegulating Spindle Lubricant Motor3.5 kw Servo MotorWheel Spindle Lubricant Motor0.75 kwSlide Lubricant Motor0.75 kwCoolant pump motor0.375 kwMachine Dimension & WeightDimension2460 x 1340 x 1650 mmNet weight3600 kgsGross weight38500 kgs

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grinder safety - the do's and don'ts - rockford systems, llc

grinder safety - the do's and don'ts - rockford systems, llc

Because grinders are everyday equipment in workplaces nationwide, many workers become complacent about their hazards. However, grinders are one of the most frequently cited machines during OSHA safety inspections. Rockford Systems, LLC, a premier provider of machine safeguarding products and services, offers this primer on grinder safety regulations to help prevent accidents and fatalities.

First off, it is important to be fully versed in the regulations that outline safe grinder installation, maintenance and operation. The workplace regulations that apply to grinders are OSHA 29 CFR SubPart O 1910.215, a machine specific (vertical) regulation with a number of requirements, which if left unchecked, are often cited by OSHA as violations. ANSI B11.9-2010 (Grinders) and ANSI B7.1 2000 (Abrasive Wheels) also apply. Carefully review these sets of regulations before operating any grinding machinery.

OSHA specifies that work-rests be kept adjusted to within 1/8-inch of the wheel to prevent the workpiece from being jammed between the wheel and the rest, resulting in potential wheel breakage. Because grinders run at such high RPM, wheels actually explode when they break, causing very serious injuries, blindness and even death. In addition, the distance between the grinding wheel and the adjustable tongue-guard also known as a spark arrestor must never exceed 1/4-inch. Because the wheel wears down during use, both these dimensions must be regularly checked and adjusted.

Grinder safety gauges can be used during the installation, maintenance, and inspection of bench/pedestal grinders to ensure work-rests and tongue-guards comply with OSHAs 1910.215 regulation and ANSI standards. To do so, wait until the wheel has completely stopped and the grinder is properly locked out before using a grinder safety gauge. Grinder coast-down time takes several minutes, which may tempt an impatient employee to use the gauge while the wheel is still rotating. This practice is very dangerous because it can cause wheel breakage.

Other advice: where grinders are concerned, personal protective equipment (PPE) usually means a full face-shield, not just safety glasses. The fact is, an employee cannot be too careful with a machine that operates at several thousand RPM. Remember to document any safety requirements set forth by OSHA as that is the best evidence that safety procedures are being followed.

OSHA requires that grinding wheels be ring tested before mounting them. This simple step prevents the inadvertent mounting of a cracked grinding wheel. Ring-Testing involves suspending the grinding wheel by its center hole, then tapping the side of the wheel with a non-metallic object. This should produce a bell tone if the wheel is intact. A thud, or a cracked-plate sound, indicates a cracked wheel. For larger grinders, grinding wheels are laid flat on a vibration-table with sand evenly spread over the wheel. If the wheel is cracked, the sand moves away from the crack.

To prevent cracking a wheel during the mounting procedure, employees must be very carefully trained in those procedures. This starts with making sure the wheel is properly matched to that particular grinder, using proper blotters and spacers, and knowing exactly how much pressure to exert with a torque-wrench, just to mention a few things.

This OSHA-compliant Wheel-Cover allows no more than a total of 90 degrees of the wheel left exposed. (65 degrees from horizontal plane to the top of wheel-cover). Never exceed these wheel-cover maximum opening dimensions. Larger wheel-cover openings create a wider pattern of flying debris should the wheel explode.

A well-recognized safety precaution on bench/pedestal grinders is to stand well off to the side of the wheel for the first full minute before using the machine. Accidents have shown that grinding wheels are most likely to shatter/explode during that first minute. OSHA Instruction Standard #STD 1-12.8 October 30, 1978 addresses the conditional and temporary removal of the Work Rest for use only with larger piece parts based on the condition that Side Guards are provided.

This single-phase unit is designed for motors that have built-in over-loads. Typical applications for these combinations include smaller crimping machines, grinders, drill presses, and all types of saws. The 115-V, 15-A disconnect switch and non-reversing magnetic motor starter are housed in a NEMA-12 enclosure. Enclosure size is It includes a self-latching red emergency-stop palm button and a green motor control start push button. It can be used on machines with 115-V and is rated up to 1/2 HP maximum. The disconnect switch has a rotary operating handle which is lockable in the off position only. This meets OSHA and ANSI standards. For machines with 230-V AC single-phase motors, a transformer is required to reduce the control circuit voltage to 115-V AC in order to comply with NFPA 79.

Double-wheel bench grinder shields provide protection for both wheels of the grinder with one continuous shield. The durable shield is made of clear, -inch-thick polycarbonate and measures 18-inch x 6-inch. A special shield bracket adds stability to the top of the shield. The single-wheel bench grinder shield is made of clear, -inch-thick polycarbonate and measures 6-inch x 6-inch. This sturdy, impact-resistant shield is designed for use when a single wheel needs safeguarding. These shields have a direct-mount base that attaches directly to the grinder table or pedestal.

PROTECTOR Series Shields can include color-changing LED lighting nested into the frame of the shield to illuminate the work area during machine operation. The LED light strip is integrated into the shield frame and each strip packs 262 Lumens of light per linear foot. For example, the PROTECTOR 28 octagonal or circular shield provides 2180 Lumens, compared to a typical clip-on work lamp that provides only 800 Lumens. Operators will appreciate the non-reflective, true-color rendering white light illuminating their work area. When the shield is moved out of the safe work position, white LEDs switch off and red LEDs switch on, thereby providing visual indication that the shield is in the open position. All LED lighting has been manufactured to exacting IEC IP65 outdoor/wet location standards to withstand coolant and lubricant splashes.

PROTECTOR Series Shields can be upgraded with a safety-rated interlock switch or switches, dependent upon application. Interlocking shields exceed OSHA CFR 1910 regulations and ANSI B11 Series standards, and are considered a best safety practice. Shield interlocks shut off or disengage power and prevent machine start-up when guard is not closed, thereby increasing operator safety and preventing bypassing. All safety interlock switches are mounted in a tamper-resistant NEMA 4 housing, comply with the IEC/EN 60947 safety standard and carry IEC IP66/67 device ratings. Additional motor starter or anti-restart devices may be required when incorporating interlocking devices into the Protector Series Shields in order to ensure safe and compliant operation.

jhc-nc centerless grinder - jainnher machine co., ltd

jhc-nc centerless grinder - jainnher machine co., ltd

They are cast of high grade FC-30 iron, melted by advanced induction furnace, then cast in resin cores. In order to ensure stability and rigidity, they are heat-treated with normalizing procedure prior to machining.

Precision ground hydrostatic bearing: Substantial decrease in heat deformation associated with hydrodynamic bearing. Minimal friction, lateral displacement, and pressure.Extended tool life under heavy cut loads. The grinding wheel spindle runs on hydrostatic bearing with high pressure oil film for added precision under heavy loads. Substantially reduces wear while prolonging spindle trueness. SNCM-210H carbon steel hardened beyond HRC60, Yielding high torsion resistance.

They are made of SNCM-220H Ni-Cr-Mo alloy steel and case-hardened, carbonize, then computerized sub-zero degree treated, to surface hardness over HRC62 at 1.0mm depth. Core hardness is kept at about HRC25-30 to ensure consistency of high precision grinding operation. Spindle withstand high torsion and have a long and lasting life. They are made of KJ-4 alloy bushing metal with a three point hydraulic cycle system. The semi-hydraulic float spindle is protected by an oil membrane which results in minimal contact friction. This device is specially designed for high speed and heavy load operation.

A Japanese servo motor provides control of speeds from 10 to 250 RPM., and is used for the regulating wheel which can be adjusted to ideal linear speeds. When the diameter of the regulating wheel changes the same linear speed can still be maintained so as grind the best quality products. The motor is driven by a timing-belt to reduce vibration and noise. Since the motor housing and spindle housing are joined together as an integrated body, when the regulating wheel tilts the motor also follows. This completely overcomes problems caused by unparallelism and torsion of belt pulleys and the belts.

There is a variable vane type oil pump for the hydraulic dressing and enforced spindle oil circulation. The oil tank is located outside of the machine for easy maintenance. Two layers of filter plus a pressure regulator ensure the cleanliness of spindle oil and the consistency of oil film thickness, thus extending the service life of the wheel spindle and the steadiness of accuracy.

Hydraulic pump for grinding wheel head and spindle motor driver with sensing function.When press wheel start button, before oil reach alloy bearing will through pressure detect switch, if pressure is not enough, it cannot push the switch, the spindle will not start. Therefore, when pressure is not enough or oil pipe blocked, pressure switch will stop the wheel spindle automatically. It will protect the wheel spindle and alloy bearing. (Hydraulic pump motor 12model is 2HP, 18, 20 and 24 models are 3HP).

The lower slide consists of two internally mounted V-shaped slides and cuneiform protector to ensure smooth movement, stable operation and prevent the entering of debris or liquid from the working environment. The swivel slides on a dovetail flute and swivels 5 degrees. There is a fine tuning hand wheel for precise adjustment. The accuracy per calibration is 0.001mm in diameter for high precision and easy operation.

The device is made of FC-30 cast iron and normalized then precisely ground. It is driven by a hydraulic system with a step-less speed regulator for easy and steady dressing. There is a safety handle for emergency purposes. In order to upgrade the straightness and the surface finish on through-feed grinding of long work pieces, please adjust the angle of the dressing device (swivels 5 degrees). The regulating wheel should be adjusted to resemble a concave barrel to increase contact length while grinding.

grinding - di-coat corporation

grinding - di-coat corporation

The DCC-J250 Bullnose Grinder is a heavy-duty machine ideal for grinding a bullnose or chamfer on any corners of a concrete block from solid. This machine can also be easily adapted for grinding scores on either the long or short face. Its compact design takes up very little floor space and requires only one operator.

The DCC-J275 End Grinder is a heavy-duty machine designed to efficiently grind ends or the face of concrete masonry units, including L shaped blocks, using a single layer Di-Coated diamond drum. Its compact design takes up very little floor space and requires only one (1) operator. The standard machine is set up for wet grinding, but it can be offered as an optional dry grinding system.

The DCC-J300 Bond Beam Saw is a heavy duty machine designed to efficiently cut web sections in CMUs. Blocks move continuously in a single row on a variable speed conveyor. The basic machine is setup for wet sawing two slots at the appropriate depth in a single pass utilizing single layer diamond coated or metal bond segmented diamond blades.

Production Rate/Operation Guidelines: (Approximate) 4 blocks/min. at 6 ft./min. conveyor speed (6 depth of cut) 6 blocks/min. at 8 ft./min. conveyor speed (4 depth of cut) 8 blocks/min. at 10 ft./min. conveyor speed (2 depth of cut)

The DCC-Z500 Masonry Block Grinder is a heavy- duty machine designed for high production face grinding of CMUs using Di-Coated Diamond Drums and / or vertical spindle wheels. The modular grinding station setup offers the rapid stock removal of diamond drums and the excellent finish of a vertical spindle diamond disc. Sequential power-up of motors helps cut power cost and prevents power surge.

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