The precision grinders used in a tool and die shop or injection mold making shop are some of the most important machine tools of all. These silent workhorses include the manual surface grinder, CNC surface grinder, and jig grinder.
With the extensive use of wire EDM the need for precision grinding has diminished in volume, but not in importance. There just is not as much work in the grinding department, but the grinding operation is absolutely essential to the overall process of toolmaking.
4 Angle Grinder
Some of the typical work done on precision grinders include the basic squaring up of core and cavity blocks, die blocks, finishing core pins and punches, finishing parting lines and shut offs and fitting slide lock angles.
Just imagine not having the capacity to do these few tasks and the entire process comes to a halt. You may be able to hard mill a lot of the details, and the sinker EDM can do a great deal, but surface grinding is still an essential part of toolmaking.
One of the old school precision grinders is the jig grinder. It is a very precise grinder, capable of many different operations, yet it is often overlooked as a viable machine tool. Besides the round holes, such as ejector pin holes or die openings, there are many unusual things this tool can do.
One good use is the adding of radii on components. This is often done by hand, with sometimes questionable results that tend to take a long time to achieve. Think of ejector blades, for example. The top area needs to have a radius in order to fit in the opening it will work in. If you only have a few to do, it is not hard to do them by hand. However, if you have 50 blades and all of them require 4 corners to be fitted, the jig grinder can do this accurately and quickly.
Both the jig grinder and surface grinder need good accessories in order to perform as they should. The sine plates, precision vises, angle plates and wheel dressers need to be of the highest quality. These need to be so trustworthy that they repeat 100% of the time and do not wear out.
A typical grinding area should include a granite surface plate, surface gage and test indicator, drop indicator and stand, height gage for scribing lines, squaring block and indicator, angle plates, magnetic squaring blocks, magnetic and non-magnetic sine plates, and spin fixtures.
You also need gage pins, gage blocks, and much, much more. It is wise to get the best you can afford, so that the toolmaker can work quickly and confidently.
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DEWALT D28110 4-1/2-Inch Small Angle Grinder Feature
- 7.0 Amp ac/DC, 11,000 rpm motor designed for faster material removal and higher overload protection
- Quick-Change Wheel Release allows tool free wheel removal without need for a wrench
- Low profile, jam-pot gear case increases durability and allows tool to fit into tight spaces
- Oversized, protected spindle lock button provides easier and quicker wheel changes
- 2-position removable side handle provides increased comfort and control; Slim, ergonomic body design provides increased comfort in extended use applications
DEWALT D28110 4-1/2-Inch Small Angle Grinder Overview
The powerful DEWALT D28110 4 1/2-Inch Small Angle Grinder is compact enough to fit in tight places for a wide variety of grinding and cutting applications. Its ergonomic body is easy to manipulate, and its durable components make this small angle grinder an easy all-around pick.
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 Powerful 7 amp motor delivers 11,000 rpm to satisfy both cutting and grinding needs. View larger. |
 This small angle grinder features a two-position side handle for maximum control in tight spaces. View larger. |
Versatile and aggressive, this small angle grinder features a 1.1-horsepower, 7 amp motor that's designed to deliver 11,000 rpm for efficient material removal. Its jam-pot design provides precise gear alignment and allows the grinder's transmission to be smooth and quiet. Also, the low-profile gear case allows the tool to fit easily into tight spaces, so you waste less time hand-finishing hard-to-reach areas.
Designed for Comfort and Convenience
Getting the job done quickly and effectively is all about maneuverability. This paddle-switch tool weighs 4.1 pounds and features a switch lock-on and multiposition side handle for multiple grip options. The oversized spindle-lock button and Quick-Change Wheel Release keep allow for tool-free wheel removal. In addition, the grinder's matching wheel flanges allow it to be used with a wide range of common accessories.
The D28110 4-1/2-Inch Small Angle Grinder comes with a DEWALT warranty package that includes a three-year limited warranty, a one-year free service contract, and a 90-day money-back guarantee.
What's in the Box
D28110 DEWALT 4 1/2-Inch Small Angle Grinder, two-position side handle, depressed center wheel, adjustable guard, and wrench.
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Available In Stock. |
