Carbide Turning
The Turning Page “the Turning Revolution”
In the pursuit of doing more with what you have, this month’s article explores a unique method of “piggy-backing” with the sub spindle to produce two holes at the same time.
This method uses the time and motion of the turret as it drills in the main spindle to drill simultaneously with a part semi completed that is already in the sub spindle. This gives you two drilled holes in the time it takes to drill one hole. Since drilling is often the longest single operation in a cycle, any way to reduce it or benefit by doing something else is a bonus. (More money in your pocket) Those of us who used to work on manual turret lathes know the value of “piggy-backing” or using “trees” and “nests” to put more than one tool into the cut at one time with some good old ingenuity. The difference here is we are using the machine and it’s programming to get creative instead of a complete manual solution.
The easiest application or drilling two holes at once is where your holes are the same size and the same length. Let’s say you have a 4” long part that has a 1” hole all the way through with a 1.25 counter bore on each end. Instead of drilling the 1” hole all the way through from one side, you could drill half way with each spindle and save time and money by doing it.
When there are odd diameter holes to be drilled there are a few items to contemplate before deciding whether this method will work satisfactory.
1.Size of the holes
2.Depth of the holes
3.Type of material
If the diameter of each hole is too far off from each other, the surface footage may be too unmatched to make this work well. As an example, if the first hole in the main spindle is 1.000 inch diameter and the 2nd hole on the sub spindle side is .125 diameter, the difference between the two diameters is .875 creating a problem in most materials.
However, even with a big difference in diameter and surface speed, a situation like this could be resolved by using a carbide drill for the 1.000 diameter on the main spindle and a high speed drill for the .125 drill.
An example of this:
A carbide 1.00 diameter insert drill in 316 SS = 400 SFM at .003 IPR
Main spindle RPM = 1528
A high speed .125 diameter drill in 316 SS = 50 SFM at .002 IPR
Sub Spindle RPM = 1528
The machine I used for the article example was done on the Eurotech 735SLY, a dual spindle, single turret machine.
I hope you’ll be able to take away something of value from this month’s article and as always, keep on turning!
Oh! And by the way if you are reading this before September 14th, check out my up and coming movie star (we pray) daughter on the AMC channel at 8PM and September 15th at 3AM (if you are an insomniac). She is hosting “Dinner and a Date” during the breaks of the movie “Pretty in Pink”. Her name is Mary Greenawalt and I hope you will watch and be able to say you saw her when she was just starting out. Wishing you all great success and Mary, “break a leg”!
For any comments, questions, or additional information, email me at larryg@eurotechelite.com
About the Author
Larry Greenawalt from
EurotechElite was an
experienced engineer who
was in charged of the Eurotech’s
engineering department.
Turning with carbide turning and boring tool
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Tungsten TNMM432H KT300 Carbide Turning Inserts $220.99 |
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Valenite CNMM644HS CNMM190616-HS SV315 Carbide Turning Inserts $257.68 |
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SECO Carbide Turning Inserts LCGA 130301-0165-FG CP500 Qty 9 [406] $55.00 |
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TUNGALOY Carbide Turning Inserts TNMG-433-TM T9025 Qty 10 [407] $45.00 |
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Indexable Carbide Turning Inserts SPC-42-ZR TCN55 Qty 10 [407] $35.00 |
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Indexable Carbide Turning Inserts SPC-42-ZR TCN55 Qty 11 [406] $38.00 |
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KENNAMETAL Carbide Turning Inserts TPMT-2152-MF KC9325 Qty 5 [407] $30.00 |
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turning lathe triangle inserts 6 pcs TPG321 grade C2 carbide shop logan lathe $16.50 |
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CERATIP CNMG-431 CARBIDE TURNING INSERTS $30.00 |
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Sandvik Carbide Turning Inserts TCMT 432-UR $58.95 |
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Carboloy 370 C-16 1″ Turning Tool with Carbide Tip $11.95 |
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new kennametal turning tool & 5 carbide inserts. $79.99 |
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45deg + 90 deg + round carbide insert cutting tools for wood lathe turning work $99.95 |
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Gunsmith Lot 15 Carboloy G6 Carbide Lathe Threading Turning Bits 3/8 Machinist $9.50 |
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10 SECO CARBIDE TURNING INSERTS CNMG120412-MR3,CP500 $31.60 |
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20 x Kennametal KENDEX TNMG 322 K21 Carbide inserts lathe turning CNC $47.41 |
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10 x CNMG 120408 (CNMG-432) CARBIDE CNC TURNING INSERTS HERTEL CP3 NEW BOXED #91 $39.50 |
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WNMG432MP KCM15 KENNAMETAL CARBIDE TURNING INSERT $30.00 |
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SUMITOMO Carbide PCD Tip Turning Insert NF-DCMX32.52 DA2200 NF-DCMT11T308 [349] $30.00 |
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Interstate Indexable Carbide Turning Inserts (10 ea) $100.00 |
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HERTEL Carbide Turning Inserts SNMA543R HC325 USA Qty 6 [479] $35.00 |
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CARBIDE TURNING TOOL HOLDER T-2R T-2-R #223-0040 IN BOX $14.99 |
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Pen Turners 12mm Round Carbide Wood Turning Tool – mini micro lathe pen making $59.99 |
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VNMG332MA-US735 MITSUBISHI TURNING CARBIDE INSERT $75.00 |
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10 Sandvik CNC Lathe Carbide Turning Inserts CNMG 12 04 12-PR – Grade 4215 $47.34 |
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SANDVIK CAPTO C6 CRDCN TURNING TOOL CARBIDE INSERT Q584 $89.99 |
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TUNGALOY Carbide Turning Inserts SNMG-433-SA AH120 Qty 10 [409] $35.00 |
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TUNGALOY Carbide Turning Inserts TNMG433-TM AH120 Qty 10 [410] $45.00 |
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SANDVIK DNMA 432 CARBIDE INSERT LATHE,TURNING,BORING $6.99 |
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HERTEL Carbide Turning Inserts TPU323 HC325 Qty 10 [479] $35.00 |
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HERTEL Carbide Turning Inserts TPU323 HC325 Qty 9 [479] $32.00 |
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STELLRAM Carbide Turning Inserts TNMG-331A-3G NL92 Qty 10 [409] $35.00 |
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HERTEL Carbide Turning Inserts RNMG43R HC325 Qty 10 [479] $35.00 |
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HERTEL Carbide Turning Inserts HCX40207C HC325 Qty 10 [479] $35.00 |
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KENNAMETAL Carbide Turning Inserts WNMG432UP KC9240 Qty 5 [479] $35.00 |
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Korloy RNMG64 330 Turning Inserts Carbide TiN Coated pack of 7 $55.20 |
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Sumitomo SCGM3T0EFM SCGT09T302N-SC T1200A Carbide Turning Inserts $99.99 |
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Mitsubishi SNMA120412 SNMA433 UE6005 Carbide Turning Inserts $130.12 |
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VALENITE Carbide Turning Inserts CNMG 432-M7 UK20 Qty 10 [273] $35.00 |
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VALENITE Carbide Turning Insert TPMT 32.51 1A VP5535 Qty 1 [273] $15.00 |
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KENNAMETAL Carbide Turning Inserts DNMG333RP KC9125 Qty 2 [356] $15.00 |
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Thinbit Groove ‘N Turn LGTF030D5 3004 Carbide Inserts $414.08 |
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VALENITE Carbide Turning Inserts DNMG543M5 VP1510 Qty 10 [480] $75.00 |
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Mitsubishi DCMT150408 DCMT432 U610 Carbide Turning Inserts $209.99 |
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KENNAMETAL Carbide Turning Inserts CCMT 433 KC9110 C3 C7 LF Qty 3 [BN12] $20.00 |
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3 Carbide Tipped Midsize Turning Tools and a Set of 5 Calipers $279.00 |
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NEW 50 TAEGUTEC TCMT 110204 CARBIDE INSERTS FACING MILLING TURNING TIP $52.16 |
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Sandvik Solid Carbide Turning Inserts CNMG 543-KM 20 pcs. #234 $40.00 |
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10 PC INDEXABLE TURNING INSERTS TURNING INSERTS INEXABLE CARBIDE INSERTS CUTTING $95.00 |
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Mitsubishi SNMG120408-MS SNMG432-MS UC6010 Carbide Turning Inserts $136.28 |
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Sandvik Solid Carbide Turning Inserts TNMG 432-PM 26 pcs. #238 $56.50 |
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Sandvik Solid Carbide Turning Inserts CNMM 542-QR 19 pcs. #217 $20.00 |
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ISCAR Carbide Turning Inserts CNMG 543-GN IC9350 Qty 10 [348] $45.00 |
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Pen Turners 55° Diamond Carbide Wood Turning Tool – mini micro spindle turn $59.99 |
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Brand new TaeguTec Turning holder with 10 carbide inserts 3/4″ shank $65.00 |
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USED KENNAMETAL Carbide Insert TURNING TOOL HOLDER DDJNR 205D 1.25″-SHK DNMG-543 $14.99 |
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USED KENNAMETAL Carbide Insert TURNING TOOL HOLDER DDJNL-164C 1″-SHANK(DNMG-432) $19.99 |
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USED TUNGALOY Carbide Insert TURNING TOOL HOLDER MVJNR 16-4 (VNMG-432) 1″-SHANK $34.99 |
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NEW UNOPENED Komet Unisix Drilling / Turning Carbide Inserts $39.99 |
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Lot 14 Super Duty Tungsten Carbide Lathe Bits 5/8″ Machinist Gunsmith Tools USA $19.50 |
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NEW 10pc Metal Lathe Mill Carbide-Tipped 1/4″ C2 Tool Tooling Turning Bits Set $17.99 |
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Carbide wood lathe turning hollowing tool gouge chisel $49.99 |
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5 Pc Indexable Carbide Insert Turning Tool Bit Set 1/4″ $20.95 |
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5 Pc Indexable Carbide Insert Turning Tool Bit Set 1/2″ $25.95 |
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PLANSEE TIZIT Carbide inserts / tips SNMG 120412EN – TM HC P20K20 Lathe turning $31.60 |
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2 x CCMT 120408 (CCMT432) US735 CNC MITSUBISHI CARBIDE TURNING INSERTS NEW #86 $9.47 |
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9.2mm SOLID CARBIDE 3 FLUTED DRILL SGS CNC SER 103M 9.2MM MILL TURN NEW #84 $26.86 |
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New 16MM Parting off Turning Tool + 10pcs MGMN200-M NC3020 Carbide insert lathe $69.99 |
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2.125mm SOLID CARBIDE STRAIGHT FLUTED DRILL MILL CNC TURN MENLO NEW BOXED #84 $7.89 |
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Sandvik Carbide Turning Inserts TCMT 432-UR, Grade 235 $65.95 |
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Sandvik Carbide Turning Inserts, DNMG 432-PM, Grade 4215 $112.95 |
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12 BRAZED CARBIDE 1/2″ LEAD ANGLE TURNING LATHE TOOL BITS $4.49 |
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NEW TELEDYNE Carbide Insert TURNING TOOL HOLDER MSSNR 164-B (1″ SHANK) $53.45 |
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Kennametal SNMG433P SNMG120412P KC910 Carbide Turning Inserts $127.81 |
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Interstate TPU432 ICP22 Carbide Turning Inserts $119.99 |
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Interstate SNMG433B ICP-55 Carbide Turning Inserts $110.87 |
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12 BRAZED CARBIDE 1/2″ THREADING TURNING TOOL BITS $4.49 |
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24 BRAZED CARBIDE 3/8″ SQUARE NOSE TURNING LATHE TOOL BITS $4.74 |
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Two Carbide Tipped Turning Tools, and a 3Pc. Caliper Set $125.00 |
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Interstate ICC-26280-D SNMG323 C7/P10 Carbide Turning Inserts, 1 Box of 9 $138.99 |
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12 BRAZED CARBIDE 5/16″NEUTRAL THREADING TURNING LATHE TOOL BITS $4.74 |
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NEW 10pc Metal Lathe Mill Carbide 3/8″ C6 Tool Tooling Turning Quality Bits Set $21.50 |
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12 BRAZED CARBIDE 5/8″ THREADING TURNING LATHE TOOL BITS $4.49 |
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12 BRAZED CARBIDE 3/8″ LEAD ANGLE TURNING LATHE TOOL BITS, $4.74 |
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12 BRAZED CARBIDE 5/8″ SQUARE NOSE TURNING LATHE TOOL BITS $10.50 |
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10 Sandvik CNC Lathe Carbide Turning Inserts DNMG 15 06 12-PR – Grade 4225 $39.44 |
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10 Sandvik CNC Lathe Carbide Turning Inserts DNMG 15 06 12-PF – Grade 4015 $39.44 |
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1/4 INDEXABLE CARBIDE TURNING THREADING TOOL INSERT SET $57.15 |
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CARBOLOY SPG 322 CARBIDE INSERT LATHE TURNING,MILLING $13.00 |
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Sandvik CNMG120408-KR CNMG432-KR 3215 Indexable Carbide Turning Inserts $198.99 |
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Valenite TNMG544M5 VP5515 Carbide Turning Inserts Box of 10 $175.99 |
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5/8 INDEXABLE CARBIDE TURNING THREADING TOOL INSERT SET $89.00 |
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DEWALT DW872 14-Inch Multi-Cutter Saw $892.58 Nicely versatile with the ability to cut a wide variety of materials including ferrous and non-ferrous metals, the DEWALT DW872 14-inch multi-cutter saw has enough capacity to cut everything from 5-inch black pipe to 2-9/16-inch solid bar stock. It sports a powerful 15 amp, 5.3-horsepower motor and is designed to stand up to rugged work on a regular basis. Cuts everything from 5-inch black pip… |
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Anytime Tools 9 pc SMALL MINI LATHE 1/4 C5 CARBIDE BIT SET $29.99 Brand New Quality bits 1/4” shank, C5 Carbide tipped lathe cutting bits for general machining operations such as turning, boring and chamfering. Includes: 2 pc AR4 2 pc AL4 1 pc BR4 1 pc C4 1 pc DD4 1 pc E4 1 pc RI4 Features: 2-1/2” long Brazed on tips Made in USA … |
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38 Piece 1/4 Lathe Carbide Tipped Tool Bit Set $21.99 Top quality 38 pc lathe tool bit set: 8 PC STYLE AL 4 PC STYLE C 8 PC STYLE AR 4 PC STYLE D 4 PC STYLE BL 6 PC STYLE E 4 PC STYLE BR C6 carbide tipped. 1/4″ shanks…. |
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Specialty Products Company CARBIDE INSERTS-PRO-CUT 06910 $99.30 For Pro-Cut Model 610 On-The-Car Lathe—- Pro-Cut Part # 50-701—- 3 cut edges —- positive rake for Fords… |
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Turning Wood with Carbide Tools: Techniques and Projects for Every Skill Level $14.93 Everything a woodturner needs to know about using and implementing the exciting new technology of replaceable carbide cutting tips is included in this guide. Woodturning tools have taken a quantum leap since the recent introduction of these tips that have greatly simplified the task of turning in dry stock. Carbide-tipped woodturning tools are safer, faster, easier, and more efficient than tradit… |
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ISO 514:1975, Turning tools with carbide tips – Internal tools $41.00 This International Standard specifies the types and dimensions of turning tools with carbide tips; it deals only with internal tools.External tools and the definition of right-hand and left-hand tools are the subject of ISO 243; designation and marking are the subject of ISO 504.The shank sections and the inserts used are selected respectively from those defined in ISO 241 and ISO 242. This title … |
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Cutting Tool Technology and Their Applications (Turning, Boring Carbide, Ceramics, Cermets) … |
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14mm (9/16) 90° Diamond Scraper That Features a Solid Carbide Insert $39.99 All Harrison Specialties wood turning accessories are proudly Made in America by American crasftsman! Tired of sharpening your turning tools? Carbide tools are the answer, and they are a joy to use. This 14mm (9/16″) 90° diamond scraper features a solid carbide insert that stays sharp much longer then any other tool. Just rotate the insert to expose a new cutting surface. Measures 14″ long overa… |
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Turning On $8.99 Turning On |
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The Turning $6 The Turning – Oasis |
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Engine Turning Kit Standard Engine Turning Kit $57.99 Two money saving kits that have everything needed to produce an attractive jeweled finish on hammers triggers rifle bolts etc. Select the kit that best meets your needs and save the time and cost of buying individual pieces. The Standard Kit contains two of our E/T Brush sets and a container of 120 grit silicon carbide abrasive; the Deluxe Kit adds our E/T Brush Holder Assembly that gives just the right amount of brush pressure against the work piece. Use the Standard Kit if you primarily work on flat surfaces. The Deluxe Kit produces a great finish on flat or curved surfaces. To get the best results the kits should be used in a drill press. Mfg: Brownells SPECS: Each kit contains twelve E/T brushes 24 O-rings two 4" lengths of heat shrink tubing one 4 oz. container 120 grit Silicon Carbide Abrasive a 1 oz. bottle of Do-Drill and complete instructions. The deluxe Kit adds the E/T Brush Holder. |
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Engine Turning Kit Deluxe Engine Turning Kit $82.99 Two money saving kits that have everything needed to produce an attractive jeweled finish on hammers triggers rifle bolts etc. Select the kit that best meets your needs and save the time and cost of buying individual pieces. The Standard Kit contains two of our E/T Brush sets and a container of 120 grit silicon carbide abrasive; the Deluxe Kit adds our E/T Brush Holder Assembly that gives just the right amount of brush pressure against the work piece. Use the Standard Kit if you primarily work on flat surfaces. The Deluxe Kit produces a great finish on flat or curved surfaces. To get the best results the kits should be used in a drill press. Mfg: Brownells SPECS: Each kit contains twelve E/T brushes 24 O-rings two 4" lengths of heat shrink tubing one 4 oz. container 120 grit Silicon Carbide Abrasive a 1 oz. bottle of Do-Drill and complete instructions. The deluxe Kit adds the E/T Brush Holder. |
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Turning $15.99 Seventh Wave Productions:7006 |
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JET 660210 23-Piece Turning Tool Kit for ZX Lathes $329 23-Piece Turning Tool Kit for ZX Lathes – 660210. 3 double ended boring bars. Parting tool holder and adjustable turning tool holder. Revolving knurling tool with three pairs of knurls. Half dead center. Carbide tipped dead center. Heavy-duty live center. Cut-off tool. 8 HSS tool bits. 4 hex key wrenches |
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JET 660200 22-Piece Turning Tool Kit for 13 & 14-in Lathes $259 22-Piece Turning Tool Kit for 13 & 14″ Lathes – 660200. 3 double ended boring bars. Parting tool holder and adjustable turning tool holder. Revolving knurling tool with three pairs of knurls. Half dead center. Carbide tipped dead center. Heavy-duty live center. Cut-off tool. 8 HSS tool bits. 4 hex key wrenches |
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the Turning $5.59 This book is in New – Excellent condition |
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As If in Turning $9.75 No Synopsis Available |