Who makes Harig surface grinders?
STK Rebuilders, Inc.
Over the past 30 years, Harig/Mitsui Surface Grinder Rebuilders, a Division STK Rebuilders, Inc. has rebuilt well over 1,200 surface grinders, ranging from Harig, Mitsui, Okamoto, Boyar-Schultz, Brown & Sharpe, and many other surface grinders.
What are the four types of surface grinders?
Four types of surface grinders are commonly used in industry: the horizontal spindle/reciprocating table; the horizontal spindle/rotary table; the vertical spindle/reciprocating table; and the vertical spindle/rotary table.
What are the three basic types of surface grinders?
There are three basic types of surface grinders: horizontal-spindle, vertical-spindle, single disc grinders and double-disc grinders. Each machine is best suited to certain items. The essential difference is in how the grinding wheel makes contact with the workpiece.
What is the difference between surface grinding and cylindrical grinding?
The easiest way to describe the difference between these two methods is the result. The shape of the material. When you use a surface grinding machine the cut is in a flat shape. On the other hand, when you use a cylindrical grinding machine the cut is round.
How accurate are surface grinders?
A surface grinder is a machine tool used to provide precision ground surfaces, either to a critical size or for the surface finish. The typical precision of a surface grinder depends on the type and usage, however ±0.002 mm (±0.0001 in) should be achievable on most surface grinders.
How do you increase surface finish in grinding?
5 Grinding Considerations for Improving Surface Finish
- Grinding Operational Parameters. Adjusting the grinding parameters can be the easiest and fastest solution to improve a part’s surface finish.
- Grinding Wheel Dressing.
- Grinding Wheel Composition: Grit Size.
- Coolant Delivery.
- Machine Condition.
What are the five kinds of surface grinders?
Types of Surface Grinding Machine
- Horizontal-Spindle Surface Grinder.
- Vertical-Spindle Surface Grinder.
- Disc Grinders and Double-Disc Grinder.
- Grinding Wheel for Surface Grinder.
- Base.
- Hand Traversing Wheel.
- Cross Slide Hand wheel.
- Work Table.
What is green grinding?
Green grinding involves high speeds and heavy stock removal to grind parts, such as this crankshaft, in the as-cast condition without prior machining.
What is the most common method for grinding holes within a workpiece?
Surface grinding
The workpiece is fixed on a table and the wheel is rotated at high speed to perform grinding. The double-ended type is equipped with wheels above and below to perform grinding the workpiece in between. Surface grinding is the most common grinding method and is used in a wide range of fields.
How much can you take off with a surface grinder?
GRINDING ALLOWANCE:
the amount of metal to be removed should be based on the capabilities of the grinding machine. If the grinding machine is modern and in good condition, leave as much as l/32-inch or even more on large machine steel parts, but generally not more than l/64-inch on small machine parts.
What are the 3 factors for successful grinding?
Here are some key factors that can affect the results of surface grinding.
- Grinding Wheel Material. One main factor that can affect the results of surface grinding is the material used for the grinding wheel.
- Hardness and Dressing.
- Feed and Speed.
- Workpiece Material.
Which process gives best surface finish?
Explanation: Honing is a surface finishing operation used to give better surface finish and have very small material removal rate.
What does Z mean on an abrasive wheel?
Wheel grade
From A (soft) to Z (hard), determines how tightly the bond holds the abrasive. A to H for softer structure, I to P for moderately hard structure and Q to Z for hard structure.
What is a pink grinding wheel used for?
The 80 Grit Pink Wheel is specifically designed for the high stainless steel blades used on hockey player skates. These grinding wheels come standard on all new machines, and are recommended for sharpening hockey player skates. All Wissota grinding wheels are hand balanced and side finished to remove any wobble.
How do you dress a surface grinder wheel?
How to Dress and Balance a Surface Grinder Wheel – YouTube
How accurate is a surface grinder?
What is spark out time in grinding?
Spark-out produces parts with high flatness and smooth surfaces in grinding. Elastic deformation on wheels and workpieces diminishes during spark-out, and this increases dimensional accuracy. Despite its potential for high-quality productions, spark-out is time-consuming.
How do you smooth metal after grinding?
Fixing Grind Marks on Steel – YouTube
What does a 125 surface finish mean?
A 125 finish means 125 millionths of an inch or 0.000125″.
Do abrasive wheels have a shelf life?
Storage conditions will also have an affect. However, many types of wheel will last much longer than 3 years if stored according to manufacturers guidance. Some indefinitely. You need to be sure that the wheel compostition has an expiry, not all do.
What does the letter D mean on an abrasive wheel?
Diamond
First letter = abrasive material. A= Aluminum Oxide (usually metal) S- Silicone Carbine (usually masonry) C- Ceramic. D- Diamond.
What does dressing a grinding wheel do?
If you have noticed your grinding wheel is producing parts with inconsistencies then it may be time to dress your wheel. Dressing is used to remove grains, clogs, and excess bonding material from the wheel in order to return to its original surface finish and sharpness.
How often should a grinding wheel be dressed?
Dull dressing tools glaze the wheel face to produce a dull wheel. To maintain a well-defined and sharp diamond point, rotate the single-point or cone-point tool 1/8 turn at regular intervals. The frequency of these rotations will depend on how often you dress, but a minimum of once per day is a good rule of thumb.
How do you polish steel after grinding?
Sand the part with progressively finer sandpaper, working from 40-grit down to 320-grit. Once finished with 320-grit sandpaper, the grind marks should be completely removed. If a polished surface is desired use 600-grit sandpaper and water to remove the very fine scratches left by the 320-grit.
What does C mean on surface finish?
roughness sampling length
The letter c provides the roughness sampling length in millimeters or inches, while d gives the direction of the surface lay. The value of e indicates a minimum material removal requirement in millimeters.