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There is variety of drill presses. You can get any from bench top drill press, which is also regarded as the ever-best and most effective tool for the users. Here are some notable things that you should know before you handle.
The majority of exercises acquire velocity arranged through relocating the generation belt from pulley to a different usually, the small, the pulley, and the quicker this rotates. Along with the majority of slicing procedure, reduced rates of speed tend to be much better with regard to drilling metallic whilst quicker tend to be much better with regard to hardwoods.
To suit the belts, open up the chuck, slip within the bit as well as comfortable the chuck manually round the pieces base manually, after that tightens up three jaws from the chuck using the key. Take away chuck simply because through leaving behind this generally there, it might be an unhealthy charge during the time of switching within the drill. Take notice which drilling associated with bigger gaps needs drilling of the smaller sized preliminary pit very first.
A few exercises include a turn with regard to modifying the peak from the desk while some may maneuver openly following the launch from the clamping level. Arranged the desk towards the preferred elevation in accordance with the procedure you have to carry out.
At some point, you may not need to modify the count level, particularly if you are simply drilling the pit on the bit of share. In contrast, level gauging is essential in case you tend to be coping with halted gaps associated with permanent level, slow up the bit towards the preferred elevation, after which change the pair associated with Knurled nuts in the level gauge towards the proper preventing point. Among the pair ought to quit the spindle as the some other locks in position the very first nut.
Repairing the work-piece in position is essential beginning to run the drill press. The drill bit rotator might attempt to rotate the metallic or even woodwork item, this particular calls you have to clamp the worktable, brace this from the assisting column which in the back of the device.
As soon, as you possess arranged the rates of speed, modified the desk as well as guaranteed the work piece, placing the drill press the operation is extremely simple. Make sure the drill is rotating in maximum velocity and present the bit towards the work-piece whilst decreasing the bit through moving the spinning level. Following the pit continues to be drilled, launch the force within the level to come back to this in order to the initial place featuring a Spring-loaded come back system.
Whenever drilling alloys, it is very important to arrange the drill press for lower rates of speed because of the higher thickness from the metallic materials. Drilling via a metallic in higher rates of speed will certainly burn up the drill bit. You may also use several drops associated with slicing oil prior to drilling towards the metallic being an extra preventative calculates.
To slice the group, you ought to connect the circle cutter after which clamp the work-piece in the relationship. To avoid desk problems, put the scrap bit of wooden underneath the work-piece.
The drill press is an extremely helpful as well as a useful device in case you have one main with regard to use in the home. A few cardinal rules, which, you have to follow.
Those inside point form tend to be the following:
Drill press and oscillating. sander
Here’s a great new bench-top tool from Craftsman at a terrific price. You get an 8-1/2 in. drill press and an oscillating sander for only $160.
The drill press has five speeds (620, 1,100, 1,720, 2,340 and 3,100 rpm), and the oscillating sander gives you a choice of 13, 22, 35, 47 or 62 strokes per minute. The sander spindles range in size from 1/2 x 4-1/2 in. (one is included) to 2 x 4-1/2 in. The “8-1/2 in.” designation means you can drill a hole in the center of an 8-1/2 in. wide board.
The best thing, however, is how easy it is to change from the drill press mode to oscillating sander. Simply slip the sander drive belt around the top slot in the front pulley and around the oscillating gear pulley.
Listen up, lefties! Now there’s a tape rule that keeps the numbers right side up.
The Southpaw Tape Rule lets you pull the tape from right to left (the way lefties want to use a tape) without having to read upside-down numbers.
Southpaw Tape Rules come in 16- and 25-ft. lengths and sell for under $15 and $19, respectively. There is a $5.50 shipping charge.
Southpaw Enterprises, Dept. TFH, Box 835,
Nelson, BC, V1L5S9; (800) 818-9610 (in
What’s this? An easier way to clean the outside glass of your windows?
Armor All’s new E-Z Spray Exterior Window Wash makes this job as easy as it can get, short of getting someone else to do it. Attach the solution-containing spray bottle to your garden hose, spray the windows, let it work for about a minute and then hose it off.
A 22-oz. bottle sells for around $8 and will clean approximately 20 average-size windows.
Armor All Home Care Products Dept.
TFH, 385 Meeting St., Charleston, SC
29403; (800) 398-3892.
Gel wallpaper stripper
Two things are wrong with most wallpaper strippers: They run down the wall the instant you spray them on, and they stink! The Zinsser Co. has solved both of these problems.
DIF Gel Wallpaper Remover can be applied with either a paint brush or roller, and once it’s on, it stays put. And best of all, there’s no smell.
DIF Gel Wallpaper Remover comes in quarts and gallons and is sold at paint and wallpaper stores and home centers.
William Zinsser & Co. Inc., Dept. TFH 173 Belmont
Drive, Somerset NJ 08876: (908) 469-8100.
Now you can get the good performance of solvent-based Plastic Wood without the messy cleanup.
Bondex’s new Latex Plastic Wood can be cut, drilled, planed, stained, varnished and painted, just like the solvent-based stuff. It also holds screws and nails without splitting, just like the original.
Latex Plastic Wood comes in half-pint and pint sizes. It’s sold at home centers and hardware stores.
Bondex International, Dept. TFH, 3616 Scarlet Oak Blvd.,
St. Louis MO 63122; (800) 231-6781
(in MO, 314-225-5001).
Deck stain and finish remover
Flood’s PowerLift Deck Stain and Finish Remover is a fast and easy way to get rid of old deck finishes. It gets under clear and semi-transparent stains and into the wood to lift the old finish away.
Just spray on PowerLift, let it work for 10 to 15 minutes, scrub any sough spots with a stiff-bristled brush and then hose it off. If your deck has mildew, the manufacturer recommends cleaning it off first with a bleach and water solution. PowerLift is not a mildew remover.
PowerLift comes in 1- and 2-1/2 gal. sizes and sells for about $18 and $45, respectively. One gallon cleans 100 to 250 sq. ft. Look for it at paint stores and home centers.Read More
Hertel AG has introduced a new drill touted to be even better than the firm’s sophisticated ‘sculptured edge‘ (SE) drill. The new BF drill is built upon the SE drill, but it is actually composed of three tools: the center drill, the drill and the countersink. Hertel’s new product is reported to be several times faster than both the high-speed steel drill and the standard carbide drill. The new drill features a unique point and a wider and stronger web, which help improve the quality of holes and the efficiency of machining. Hertel cautions that the BF drill should not be used in hand tools or ordinary drill presses because such tools lack the rigidity needed by the new drill.
Back in the February, 1988 issue (p. 14) we told you about the SE drill from Hertel Cutting Technologies Inc. (Oak Ridge, Tennessee). As it is unlikely that you have that issue at hand (perhaps you have it stored in your multi-year file of PRODUCTION issues you’ve known and loved), here’s a refresher:
“Fire the Plant Manager” was the headline, which was a quote from the Hertel spokesman – actually Karl Hertel, president of the parent company, Hertel AG. He maintained that the SE drill – the letters of which stand for “sculptured edge” – is so good in terms of performance, that any plant manager who allowed high-speed steel (HSS) drills to be used on machining centers now that the SE had arrived ought to find new work, given the producitivity advantage of the new tool.
Well, that was then and this is, of course, later. And Hertel has come out with a new drill, the BF drill. But, at he risk of making a bad pun, there’s a new twist to this one. It’s three, yes three, three tools in one: center drill, drill, and countersink.
At the center of the whole thing is the SE drill, Jules Berkowicz, product manager for BF, says that the new drill “won’t walk” even though there’s no center drilling performed. The SE edge, apparently, takes care of that problem.
And yes, it is still claimed to be fast: penetration is said to be 7.5 times faster than a HSS drill and five times faster than a standard carbide drill. It seems that the SE drill, in addition to having the unusual point, also has a web that’s thicker and stronger than that found on most drills. That wider web, combined with the point, results in the production of small – on the order of 1/4 in. or so – chips, not a spiraling nest. Berkowicz likens this to the sort of chips produced by turning tools instead of conventional drills. Which helps in terms of hole quality and machining efficiency.
Or, not to put too fine a point on this, the drill performs in a manner not so much like laboriously twisting and turning its way through the workpiece materials (and the BF is suited for steel, cast iron, and aluminum) as it is like “punching” its way through. Wham! There’s a hole.
Now, because of this capability, there is an equipment factor that should be taken into account: this is not a tool that can be used in most ordinary drill presses. These pieces of equipment are not rigid enough to permit the tool to do its job.
Berkowicz says that while an SE drill can put about 3,000 holes in a 4140 before it needs resharpening, a comparable HSS drill would need to be pulled out after about 500 holes.
(It must be pointed out, however, that due to the specialty of the SE point, which necessitates special resharpening fixtures, the drill can be resharpened only at the factory or one of the grinding centers Hertel has setup across the country.)
Although this has thus far been about the SE portion, there is still more being held in the toolholder than that. There are one or two finished and ground inserts flanking the SE for 45 deg. chamfering or Hertel can supply 90 deg. blanks that can be ground by the user for one’s particular form. (One insert is needed for drill diameters up to 0.354 in.)
Specification-wise: the drill is available in diameters ranging from 0.134 in. to 0.709 in. The counter-boring or facing range runs from 0.200 in. to 1.600 in. Berkowicz stresses that the BF is a standard product. “Anytime you can buy a standard tool to do something, you’ll save money.”
The BF drill also allows users to save a couple of other things. One is space. The other is time. No, we’re not being cosmic here.
Because it is a combination tool, when used in a tool magazine it takes up one pocket, not two or three as would be needed if a center drill, drill and countersink were employed. That’s the space portion. As for time, it’s based on the same thing: there isn’t any tool change time involved. Even very speedy machining center tool-changers take at least a couple of seconds to change tools, so do a little multiplication and the seconds can become minutes.
As all good product managers tend to do, Berkowicz says that the BF drill is for “any company that drills holes.” Which seems a bit all-embracing. Given the efficiencies designed into the product, it is probably for any company that drills lots of holes.
Hertel is a German company. And so it is not surprising that the BF drill debuted there before it was brought to the U.S. And the debut was, indeed, grand. In 1991, the company shipped some 30,000 BF drills. Lots of drills. Lots of holes. – GSV
To find out more, circle 290 on the reader service card.Read More
If you need to make a lot of holes of moderate depth (up to about 4 times the diameter of the drill) indexable insert drills are your first choice. Indexable drills combine the high speed capacity and accuracy of carbide cutting edges with the ability to index the inserts and reuse the drill body without regrinding. Indexable drills make efficient use of the machine tool’s horsepower and permit higher penetration rates and concurrent reductions in cycle times. A few application tips can help you gain maximum benefit from the use of indexable insert drills.
An indexable insert drill employs at least two inserts (Fig. 1). The inside insert cuts the inner portion of the hole, and the outside insert creates the final hole diameter. Because the cutting speed at the centerline of any drill is zero, the cutting edge at the point must be durable enough to withstand the compressive force of machine feed without breaking. The outside insert, on the other hand, must combat higher speeds and needs to be more wear resistant. For general use, the same insert grade and geometry in both inner and outer insert pockets will do the job well. In some cases, however, the use of different grades for the inner and outer inserts will provide optimum productivity.
Users can select the appropriate carbide grades, insert radii and chip breakers to optimize the drilling process for a particular workpiece. The drills can offer increases in drilling efficiency from 300 to 500 percent, and the low cost per part they provide is most beneficial in high-production situations. Indexable drills can also drill surfaces that aren’t flat or are inclined up to 45 degrees.
The basic principals of indexable insert drill design are similar, but manufacturers offer their own variations. For example, Drill-Fix indexable insert drills from Kennametal can drill from solid, bore, face, and chamfer, and also have the capability to be offset in the +X direction. This enables the drills to produce hole sizes larger than the nominal drill diameter, permits fewer drills to cover a wide application range, and often eliminates the need for costly special-diameter drills.
As with any tool, correct application is the key to gaining maximum productivity from indexable drills. The first consideration is sufficient rigidity and power in the machine tool on which the drill will be used.
Cracking and chipping of insert edges (Fig. 2) usually is a result of insufficient rigidity in the machine tool or inadequate fixturing of the workpiece. Check the machine alignment and tool clamping accuracy. Too much overhang of the drill may also reduce rigidity of the setup. If tool clamping can’t be improved, machine rigidity is questionable, or both, a reduction in feed rate can help reduce insert chipping. A tougher carbide grade–with higher transverse rupture strength–can also withstand the impacts resulting from unwanted drill and workpiece movement relative to each other.
Excessive insert wear (Fig. 3) may be a result of excessive cutting speed. Reducing speeds is one way to reduce wear, or it often can be minimized by increasing coolant pressure and volume. Another alternative is substitution of a more wear-resistant (harder) carbide grade, especially for the outer insert.
Uncontrolled, the factors above can result in poor hole quality. In addition, rough cutting action and unacceptable surface finish can result from feed rates that are too high. Lowering feed rates, or sometimes increasing speed, can overcome rough and rumbling cutting.
Another cause of poor hole quality is trapped chips (Fig. 4). Good coolant pressure and volume can help dissipate heat and evacuate chips. Increased coolant pressure and volume can also result in a cooler part and longer tool life.
One of the major advantages of indexable insert drills is the availability of chip control geometries. Your manufacturer’s representative or literature can help you choose the geometry best suited to your workpiece material. But if long, stringy chips remain a problem, try increasing cutting speed while maintaining the feed rate. However, if the chips turn dark blue, a symptom of excessive heat, either reduce the cutting speed or increase the supply of coolant. If chip formation is still unsatisfactory after increasing cutting speed, try increasing the feed rate until chips break adequately.
On the other hand, if chips are short, thick, and flat, the feed rate may be too high in relation to the cutting speed. You should try lowering the feed, increasing cutting speed, or both. Increasing coolant pressure and volume, and careful inspection of tool clamping, machine rigidity, and workholding setup can also contribute to better chip control and improved hole quality.
Any application guidelines for indexable insert drills should be accompanied by a safety note regarding through-hole operations. As the drill breaks through the workpiece a slug is formed (Fig. 5). Because the drill is stationary and the workpiece is rotating, centrifugal force may hurl the slug from the chuck with great force. Provide adequate shielding to protect all bystanders.Read More