Smithy Midas 1220 LTD Bedienungsanleitung

MIDAS 1220 LTDCOMBINATION LATHE/MILL/DRILLOPERATOR’S MANUALUpdated July, 2008170 Aprill Dr., Ann Arbor, MI, USA 48103 Toll Free 1-800-476-4849www.smit

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Assembly1. Basic assembly is the reversal of the above steps.2. It is important to make sure all parts are clean and properly lubricated where needed.

Chapter 21MI-1220 LTD Full SpecificationsGeneral DimensionsLength 53-1/2”Width 20”Height 37”Shipping Weight 480 lbsMachine Weight 397 lbsCrate Size 57

Threads-Metric 0.5 to 4 mmToolpost Travel 3-1/4”Toolbit Size 1/2”X-Axis Travel (w/tailstock installed) 26”Y-Axis Travel 8-1/2”Mill SpecificationsColum

Chapter 23Machine Warranty30 Day Trial OfferTry a Smithy for 30 days. If, for any reason within that time, you decide to return yourSmithy, just call

In no event shall Smithy be liable for indirect, incidental or consequential damages for thesale or use of the product. This disclaimer applies to bot

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Inventory ChecklistivOr Visit www.smithy.com! Gear,45 TeethPart # C30156Quantity 1! Gear,48 TeethPart # C30151Quantity 1! Gear,49 TeethPart # C30152 Q

Midas 1220 LTD Operator’s ManualvFor Assistance: Call Toll Free 1-800-476-4849Missing Items?If you find that an item is missing or defective from your

Chapter 1IntroductionCongratulations on purchasing a Smithy lathe-mill-drill. We are pleased you chose Smithyto fulfill your machining needs.The pur

Chapter 2SafetyYour workshop is only as safe as you make it. Take responsibility for the safety of all whouse or visit it. This list of rules is by no

13. Use the correct tool for the job. Don’t try to make a tool into something it isn’t.14. Keep your mind on your work. Pay attention to these simple

Chapter 3Caring For Your MachineYour machine is a delicate, precision tool with hardened ways and hand-scraped bearingsurfaces under the table and car

Chapter 4Basic Parts of the MI-1220 LTDLearn the operation of your machine, you have to know the names and functions of itsbasic units.Figure 4.1 Mida

3. Compound Rest. Mounted on the cross slide, the compound rest swivels to any anglehorizontal to the lathe axis to produce bevels and tapers

14. Half-nut Lever. This lever transmits power to the carriage for threading.15. Power Longitudinal Feed. Push the lever down to engage the power of t

© 2008 Smithy Co. All rights reserved (Revision 1).170 Aprill Dr., Ann Arbor, Michigan, USA 48103 Toll Free Hotline: 1-800-476-4849 Fax: 1-800-431-889

Chapter 5Uncrating and Setting Up the MI-1220 LTDMoving the MachineMoving a machine tool can be dangerous. Improper techniques and methods may injurey

CautionThe cut edges are sharp. The bands secure the crate top to the base.After removing the straps, lift off the crate top. Tip the crate from the t

Three-Jaw Chuck1. Remove the three bolts behind the chuck that hold it to the spindle flange (Figure 5.2).The chuck will come off. Don’t let it fall o

Cleaning and Lubricating the MI-1220 LTDSmithy machines are shipped with protective grease coating called cosmoline. UseWD-40 or non-corrosi

Open the gearbox door to expose the pick-off gears. Oil the button in the casting behindthe D gear. Then put a few drops of oil on the teeth of all th

Put oil on the button at the back of the cross slide.Oiling the LeadscrewPut oil in the oil buttons on the left trestle.Put oil in the support for the

Adjusting Belt TensionThe MI-1220 LTD has two belt tensionersinstalled by the factory. One for themillhead and the other one for the pulleybox.

Reducing BacklashBacklash of 0.008-0.015” as measured on the dial is normal. If you have more backlashthan that in your crossfeed table, refer to the

4. Start the mill motor by pushing in the green start button. After a few minutes, push inthe red stop button and allow the motor to stop. Flip the ye

Setting Lathe and Mill Speeds for the MI-1220 LTDFigure 5.14 Setting Lathe Speeds (RPM)Changing belts changes lathe speeds. The lower speeds use the t

Table of ContentsInventory Check ListItems mounted to your machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iItems packed in the

Chapter 6TurningThe lathe rotates a workpiece against a cutting edge. With its versatility and numerousattachments, accessories, and cutting tools, it

The lathe spindle holding the workpiece revolves at a selected speed (revolutions perminute, or rpm) according to the type and size of the

• The means to hold the cutting point tight • The means to regulate operating speed • The means to feed the tool into or across, or into and across, t

Chapter 7Metal TheoryTool sharpnessInstead of being the all-important factor in determining tool performance, keenness ofthe cutting edge is jus

Table 7.1 Cutting Speeds and Feeds for High-Speed-Steel ToolsIn everyday lathe operations like thread cutting and knurling, always use cutting oil oro

rpm = 1200 or next slower speed. For high-carbon steel, also 1" in diameter, rpm = 50 sfm x 4 / 1 rpm = 200 / 1 rpm = 200 or next slower speed. T

Chapter 8Grinding Cutter Bits for Lathe ToolsHigh Speed Steel Cutters The advantage of HSS cutter bits is you can shape them to exact specifications t

Front clearance must always be sufficient to clear the work. If it is too great, however,the edge weakens and breaks off (Figure 8.2). Side and back-r

Figure 8.4 When honing, draw the cutter away from the cutting edge across the oilstone.Materials Other Than Steel As pointed out earlier, when grindin

gain greater angle keenness only in increased side and end rakes. It is often advisable tohone the cutting edges of cutters used to machine brass. Not

Lathe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-7Adjusting Gibs . . . . . . . . . . . .

Acme or Other Special Threads Thread gauges are available for all standard threads. Before grinding such cutters,ascertain the correct pitc

Chapter 9Setting Up Lathe ToolsAfter selecting a cutter, insert it in the toolholder. Allow the cutter bit to project justenough to pro

Figure 9.2 The harder the steel (left),the less above center you set the cutter point.For soft brass and aluminum (right), set the cutter on dead cent

Cutoff, Thread Cutting and Facing ToolsFor cutoff, thread cutting, and facing, feed the cutter to the work on dead center (Figure9.5). For the beginne

Chapter 10Setting Up with Centers, Collets, and ChucksBefore setting work up on centers, make sure the spindle and tailstock centers alig

instruments (Figure 10.3). Centering square or rectangular stock is done by scribing linesfrom opposite corners. The intersection of these lines is th

If a combination drill is not available, you can drill centers with a small drill andcountersink them with a drill of sufficient diamet

Figure 10.8 Bolt the faceplate to the spindle flangeUsing a Clamp Dog Standard lathe dogs drive round, or near-round, shapes. Rectangular or near-rect

Note: Before starting to machine work set up on centers, check to see the lathe dog tailis free in the faceplate slot so it won't lift stock off

mandrel. When removing a mandrel, drive it back out of, instead of through, the hole.You can purchase hardened steel mandrels, which have a slight (0

Setting Up Work in a Chuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-7Mounting Work in a Four-Jaw IndependentLathe Chuck . . .

Figure 10.14 Steady rests mount on the lathe bed and provide three bearing surfacesFollow RestsLong or slender shafts that are apt to spring

Figure 10.16 Four-jaw independent lathe chucks hold round, square, eccentric, or odd shaped workpieces. and Figure 10.17 Three-jaw universal geared s

Figuere 10.18 For short, small-diameter workpieces, insert the jaws with high ends to the center.Figure 10.19 For large-diameter workpiecesinsert the

• When installing the chuck jaws on a three-jaw chuck, install them in numerical orderand counterclockwise rotation.Each jaw is stamped with a serial

Figure 10.22 Collet attachments are best for small-diameter work.• They are housed within the spindle nose for maximum tool clearance, maki

Chapter 11Lathe TurningRough TurningIn turning a shaft to size and shape where you have to cut away a lot of stock, take heavy,rough cuts to get the w

For a screw to move, there must be some play in the thread. When backing the cuttingtool away from the cut, move the feedscrew enough to tak

Figure 11.2 You can do other turning cuts with different cutter bits and cutting tools.Machining Square Corners To machine an accurate corner, follow

stroke. Use a clean, dry file and keep the workpiece clean, as well. Wipe the workpiecedry and clean if you've used coolant or cutting oil. Never

To offset the tailstock, loosen the two base-locking bolts (Figure 4.8). To offset to theright, loosen the right adjusting bolt and tighten the

Chapter 17: MillingMilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17-1Holding Milling Cut

length of the portion to be tapered. Then multiply the resulting quotient by half thedifference between the extreme diameters of the fin

Chapter 12Lathe Facing and KnurlingBefore removing your work from the centers, face or square up the ends. On accuratework, especially where shoulders

move the crossfeed lever down. Pull the lever up at the end of the cut to stop the cuttertravel.CautionRemember caution must be taken to not run the p

Use plenty of oil, lubricating both knurl and workpiece. Then start the lathe and engagethe automatic feed, moving the knurls across the portion to be

Chapter 13Cutting off or Parting with a LatheYou can cut off in a lathe only when holding one end of the work rigidly, as in a chuck.It is not practic

Chapter 14Lathe Drilling and BoringYou can lathe drill on the MI-1220 LTD in two ways, holding the drill stationary andrevolving the

Boring Boring is internal turning, or turning from within. The diameter of the opening to be boredis often much smaller than its depth. Boring tools

Figure 14.4 The cutting edge engages the work piece along a linein the mounted plane of the lathe centersFor straight longitudinal cuts, you can hold

cutter approaches the workpiece. As with external thread cutting, the internal threadingtool must engage the work on dead center and be held so the cu

Figure 14.8 Use different clearances between nut and screw for different thread types.14: Lathe Drilling and Boring14-5Or Visit www.smithy.com

Chapter 15Changing Gears on Your MI-1220 LTDTo change gears on the MI-1220 LTD follow these steps. Tools required: 10-mm wrench 6-mm Allen wrench Scre

Figure 15.2 Slide the B and C gear shaft until the C gear meshes with the D gear8. Place the selected A gear, flange side in, on the A gear shaft and

Chapter 16 Cutting Threads on Your MI-1220 LTDThreading TermsBefore beginning to cut threads, it's useful to learn the major terms us

After turning the work to be threaded to the outside diameter of the thread and settingthe gears for the desired thread, put a threading tool in the t

Figure 16.3 Using a center gauge, set the threading tool perpendicular to the work piece.Cutting Right-hand Threads Place the leadscrew selector in po

Figure 16.5 When cutting multiple threads, increase the lead to make room for succeeding threads.Continue this process until the tool is within

Table 16.1 Indicator ScaleCutting Multiple ThreadsCut multiple threads one at a time exactly as you cut single threads, except increase thelead to mak

Figure 16.7 When cutting a thread on a taper, set the threading tool at (missing text)Table 16.2 Threading Chart for the MI-1220 LTD30 1570 X 4032

Table 16.3 Feed Rates for the MI-1220 LTD27 X 2770 600.0011 0.0022 0.001 0.000370 X 4032 450.0126 0.0252 0.0015 0.003070 X 4032 420.0135 0.02

Chapter 17MillingIn milling, one or more rotating cutters shape a workpiece held by a vise or otherholding device. The cutters mount

Inventory Check ListIt is a good idea to take inventory of the parts of your machine soon after it is unpacked.By doing so, you can quickly determine

Push the mil head in the desired direction. Lock the main and centering locks to hold thehead into position To recenter the mill head, push the head i

Figure 17.3 Spring collets, which fit into the mill spindle, hold straight-shanked end mills.AdaptersAdapters mount various types and sizes of cutters

5. Holding the adapter with one hand, use a non-marring hammer (rubber, dead-blow, orbrass) to drive the drift into the slot. The taper on the tool wi

• Geometry forming end mills form particular geometries. They include ball end mills,roughing end mills, dovetail end mills, T-slot cutters,

Plain Milling CuttersPlain milling cutters have teeth only on their periphery. Used to mill plain, flat surfaces,they may combine with other cutters t

• Plain slitting saws are thin, plain milling cutters with only peripheral teeth. The teethare fine, and the sides taper slightly toward the hole, giv

Figure 17.9 Flycutters take light face cuts from large surface areas.Using Cutting FluidCutting fluids get rid of heat generated by the friction of th

milling is the distance the cutting edge of a tooth travels in one minute. If cutting speedis too high, the cutter overheats and dulls. If it's

Down milling Down milling usually produces good surface finishes because chips do not sweep backinto the cut. Setups are more rigid, an advantage when

Table 17.1 Recommended Cutting Speeds for Milling (fpm)MaterialBrinellHardnessHigh-Speed-SteelCuttersCarbideCuttersFree-machining low carbon 1111steel

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Common Milling Operations Milling Flat SurfacesOne way to mill a flat surface is by plane milling. Adjust the milling cutter vertically togive the nee

To cut bevels and chamfers, either move the workpiece into an angular cutter or hold theworkpiece at the desired angle while moving it into a plain cu

Chapter 18WorkholdingThe most common ways to hold a workpiece during milling are to secure it directly to thetable via clamps or hold it in a vise (Fi

Using special fixtures. Clamp both workpiece and fixture securely in place. Be sure theyare clean. Watch them carefully during machining; a loose fixt

Chapter 19TroubleshootingPowerfeed and Thread CuttingPowerfeed does not move carriageCause Solution• Carriage locked • Unlock carriage• Speed selector

Carriage/Milling TablePowerfeed doesn't move tableCause Solution• Carriage • Unlock Carriage• Speed Selector not engaged • Select Speed I or 11•

• Too much space between bearing and dial • Add shim washersLathe TurningCut is roughCause Solution• Tool dull • Sharpen or replace tool• Tool not gr

Too much backlash in compound Cause Solution• Loose spanner nuts • Tighten Spanner Nuts• Worn nut • Replace nutMachine slings oil from behind the chuc

• Bit bent • Replace bit• Chuck loose in spindle • Remount chuck on arbor• Drawbar not secured • Tighten drawbar• Debris on spindle • Clean debris and

Chapter 20Removing the Quill and Quill Feed AssemblyCautionHave the owner’s manual available when doing any machine maintenance. The itemsreferenced i