Milwaukee 4270-21 Electromagnetic Drill Press, 450 RPM

Magnetic Drill Help

There are a few attributes of magnetic drills to consider before purchasing one.

Hole Size: what diameter hole will you be cutting today and in the future. Most customers are drilling 1" diameter holes and smaller which will put you into a smaller and lighter drill. Some drills in this category are Jancy Holemaker, Jm101 and Magforce, Milwaukee offers their 4270-21.

Larger diameters or depths of cuts will need more powerful drills. Be careful when choosing larger drills the weights of these machines increase sharply. Some drills in this area are the Jancy USA5, 2x2, 4x4 or the Fein KBM-52U and Milwaukee 4208-1 and 4209-1.

Chuck Adapter: if you already have twist drill bits, are making holes smaller than 7/16" or need to drill a blind hole then you need a chuck adapter, these are accessories on these drills. Most of our drills will accept chucks except the Jancy Magforce.

Cutting Fluid: Buy cutting fluid, either locally or through Toolfetch it will extend the life of your cutters. If you are drilling horizontally or upside-down we carry a special paste called Tapmatic Edge Cream which will stick to the area being cut and melt with friction.

Pilot Pins: Pins are not mandatory but they help with centering your cut and ejecting a solid slug after cutting through material, there are different pins for different sized cutters

Annular Cutters: Cutters come in a variety of sizes and styles. The most common cutters purchased are the high speed cutters. These cutters can be resharpened 5-6 times depending on wear. Carbide tipped cutters are a less expensive cutter to purchase but can only be resharpened once (or in some cases not at all). Depending on your application we offer special cutters for unique situations ie: cutting pipe requires a PG cutter or cutting pipe through both sides need a PGID cutter. If your cutting through 2 separate plates at once you need an ID cutter.

Below is a list of the different style cutters offered, if you need help or need to order a special cutter call our toll free number at 800-508-4735 and a sales representative will assist you.

Annular Cutter Definitions

High Speed Steel (HSS) Cutters (M2)

High Speed Steel is the standard material used to manufacture Slugger cutters. Unless otherwise specified on the order, cutters are packaged as HSS.

Titanium Nitride (TINI) Cutters

TINI coatings improve tool life by increasing surface hardness of the tool and providing greater lubricity. TINI coated cutters are generally used in applications where the material being cut is difficult to machine, or when extended tool life is desired. To order, add the suffix "TN" after part number or set number.

Titanium Carbonitride (TICN) Cutters

TICN coated cutters are practical when drilling highly abrasive or gummy materials such as brass and aluminum alloys. To order, add the suffix "TC" after part number or set number.

M42 Cobalt Steel Cutters

Cobalt cutters are effective when drilling material with inconsistent composition. They are also valuable when increased feed rates are necessary and extending tool life between sharpening is desirable. To order, add the suffix "C" after part number or set number.

ID Sharpened Cutters

For Stack Drilling ID-style cutters are convenient when drilling through multiple layers. To order, add the suffix "ID" after part number or set number.

Pipe-Style Geometry Cutters

For Pipe and Tube Drilling Applications Cutters with pipe-style geometry are advantageous when drilling holes on curved or uneven surfaces. When ordering cutters 1-1/4" and larger, add the suffix "PG" after part number or set number. (Cutters smaller than this are manufactured standard with pipe-style geometry

Truck Frame Cutters

Cutters for Truck Frame Drilling Truck frames are manufactured to retain extraordinary strength and durability. Consequently, frame materials are more difficult to drill. An effective way to combat this problem is to use an ID-style cutter that is also TINI coated. Combined, the resulting cutter simultaneously permits continuous drilling through layers while enhancing cutting performance and extending tool life. To order, add the suffix "IDTN" after part number or set number.

Rail Cutters

Specifically designed for rail drilling. Its unique design and specially developed coating allow for faster drilling and longer life, even in the toughest rail.

Every MILWAUKEE product is warranted to the original purchaser only to be free from defects in material and workmanship. Subject to certain exceptions, MILWAUKEE will repair or replace any part on a product which, after examination, is determined by MILWAUKEE to be defective in material or workmanship for a period of five (5) years* after the date of purchase. Return the product and a copy of proof of purchase to a MILWAUKEE factory Service Center location or MILWAUKEE Authorized Service Station, freight prepaid and insured. This warranty does not apply to damage that MILWAUKEE determines to be from repairs made or attempted by anyone other than MILWAUKEE authorized personnel, misuse, alterations, abuse, normal wear and tear, lack of maintenance, or accidents.

*Every MILWAUKEE V™-technology LITHIUM-ION Battery Pack and XC LITHIUM-ION Battery Pack is warranted for five (5) years / 2000 charges from the date of purchase, whichever first occurs. The first 1000 charges or 2 years of the warranty, whichever first occurs, are covered through free replacement of the defective battery. This means that for the earlier of the first 1000 charges or two (2) years from the date of purchase/first charge, a replacement battery will be provided to the customer for any defective battery free of charge. Thereafter, the remaining charges up to a total of 2000 or the remainder of the five (5) year period from the date of purchase, whichever first occurs, will be covered on a pro rata basis. This means that every customer gets an additional 1000 charges or three (3) years of pro rata warranty on the V™-technology LITHIUM-ION Battery Pack and XC LITHIUM-ION Battery Pack depending upon the amount of use.

*The warranty period for ALL non V™-technology and non XC LITHIUM-ION battery packs is two (2) years from the date of purchase.

*The warranty period for Portable Generators is two (2) years from the date of purchase.

*The warranty period for all Ni-CD Battery Packs, Work Lights (cordless flashlights), Job Site Radios, Trade Titan™ Industrial Work Carts and Hoists (lever, hand chain, & electric chain hoists) is one (1) year from the date of purchase.

Warranty Registration is not necessary to obtain the applicable warranty on a MILWAUKEE product. The manufacturing date of the product will be used to determine the warranty period if no proof of purchase is provided at the time warranty service is requested.

Normal Wear: air nailers – staplers, like all power tools, these products need periodic parts replacement and service to achieve best performance. This warranty does not cover repair when normal use has exhausted the life of a part including, but not limited to, o-rings, seals, bumpers and driver blades.

MILWAUKEE does not cover freight or labor charges associated with the inspection and testing of portable generators or hoists (lever, hand chain & electric chain hoists) that are found by MILWAUKEE not to be a valid warranty claim. A valid warranty claim must be substantiated by the discovery of defective material or workmanship by MILWAUKEE.

*Gasoline Engine - Warranty: The gasoline engine on a portable generator is separately warranted by the engine manufacturer and is serviced through the engine manufacturer’s authorized service center network. MILWAUKEE is not authorized and has no responsibility for warranty service of any nature whatsoever for a gasoline engine. If requested, MILWAUKEE will help you locate your nearest service facility for a gasoline engine.

ACCEPTANCE OF THE EXCLUSIVE REPAIR AND REPLACEMENT REMEDIES DESCRIBED HEREIN IS A CONDITION OF THE CONTRACT FOR THE PURCHASE OF EVERY MILWAUKEE PRODUCT. IF YOU DO NOT AGREE TO THIS CONDITION, YOU SHOULD NOT PURCHASE THE PRODUCT. IN NO EVENT SHALL MILWAUKEE BE LIABLE FOR ANY INCIDENTAL, SPECIAL, CONSEQUENTIAL OR PUNITIVE DAMAGES, OR FOR ANY COSTS, ATTORNEY FEES, EXPENSES, LOSSES OR DELAYS ALLEGED TO BE AS A CONSEQUENCE OF ANY DAMAGE TO, FAILURE OF, OR DEFECT IN ANY PRODUCT INCLUDING, BUT NOT LIMITED TO, ANY CLAIMS FOR LOSS OF PROFITS. THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES OR CONDITIONS, WRITTEN OR ORAL, EXPRESSED OR IMPLIED. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, MILWAUKEE DISCLAIMS ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE OR PURPOSE, AND ALL OTHER WARRANTIES.

This warranty applies to product sold in the U.S.A., Canada and Mexico only.

Please consult the "Service Center Search" in the Parts & Service section of MILWAUKEE’s website www.milwaukeetool.com or call 1.800.SAWDUST (1.800.729.3878) to locate your nearest service facility for warranty and non-warranty service on a Milwaukee product.