feed rate within the specified range. Apr 30, 2012 #1. Exclusively Distributed By Industrial Supply Co. AR400F is a through-hardened, abrasion-resistant plate with a nominal hardness of 400 HBW. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. Workpiece Material Brinell Hardness (BHN) Morse List No. 0 amps on the VFD drive. 030" radial step at 3000 rpm and 30 ipm. 0030 0. The HyPerformance ® HPR400XD ® plasma system has been designed and built for maximum performance and productivity in X-Y, bevel, and robotic cutting operations. They are often considered as a pair because of their combined effect on the cutting process. Tangential velocity on the surface of the tool or workpiece at the cutting interface. Seems a bit fast. It's the best one I've seen yet. Create a tool for side cutting HIGH or Side cutting LOW. 00125" My machine was not completely trammed at the time but I. 0 2,7DC 130 (100─150) . It is about the same hardness as Titanium Carbonitride (TiCN,) but maintains. N = number of cutting edges (flutes) T= chip load (chip per tooth) is the amount of material, which should be removed by each tooth of the cutter as it rotates and advances into the work. 0. When feed rates approach the 0. The drill point should never squeal until it starts to dull. The highest deposition rate gas-shielded flux-cored wire is E70T-1. Sooo, unless you can really slow down your spindle, it is apparent that most cuts need to be done at a fairly high feedrate. I was thinking of. It offers higher deposition rates than GMAW, handles dirtier plates, and uses lower cost 100% carbon dioxide. Speed and Feed Calculator for Drilling and Milling,easyspeedsandfeeds. For the feed rate per revolution, please set up within the recommended feed rate of the closest diameter appropriately. T-1 steel, unlike AR400, is an alloy steel covered by ASTM A514 / A514M - 05 (2009) Standard Specification for High-Yield-Strength, Quenched and Tempered Alloy. Shank Diameter：6MM (I have a 6MM collet) Cutting Angle: 15 Degree. 010" doc . 06 0. *Drilling Operations REQUIRE A DRILLING BIT AND the SPINDLE RPM VALUE is most important! Foam Settings are based on Extruded Polystyrene (XPS) and Expanded Polystyrene (EPS). Milling Speed and Feed Calculator Determine the spindle speed (RPM) and feed rate (IPM) for a milling operation, as well as the cut time for a given cut length. The "feeds". The equation for the feed rate is: \small f = N\times C_\mathrm {L}\times n_\mathrm {t} f = N × C L × nt. G-Wizard’s cutting physics engine considers nearly 60 variables. TV . 69 Linear feed • ((Major thread Ø - Tool Ø) / Major thread Ø) Z axis move on arc on 0. If you are going to use performance carbide drills in that material, 28-32 HrC use 225 as a starting SFM and the feed rate is always a percentage of the drill size. End mills coated with TiAlN have a high resistance to heat and oxidation and should be operated at speeds up to 100% higher than uncoated mills. Start conservatively and increase speed and feed until drilling cycle is optimized. 16 RPM • Feed per flute • Number of flutes Feed rate for thread milling 12. Here's a setup for your Tormach 1100 speeds and feeds in steel (with the SFM recommendations by nutzilla above): Speeds and Feeds RPM 2670, IPM 20, DOC 0. 875 dia indexable drill in the Haas ST 10 Lathe. As a DML TA, you need to understand basic calculations that will allow the tools you use to work as intended. AR400 is a very hard abrasion resistant steel used for rock truck beds and other high wear items. IC903 H01-H10 P05-P15 M10-M20 S10-S20 AL-TEC TiAIN Ultra-fine grain carbide with 12% cobalt, TiAlN PVD coated grade. 205 for that hole, gives you about 68% of thread instead of over 70%, feed rate at 2. 0625" wide by half inch deep. Any deviations from provided numbers should be verified and adjusted through recalculation in ShopBot 3 “Chip Load Calculator. TV . 2. RECOMMENDED CUTTING CONDITIONS (inch) DC L/D. The formula for cutting speed (sfm) is tool diameter 5 0. Milling operations remove material by feeding a workpiece into a rotating cutting tool with sharp teeth, such as an end mill or face mill. Will take about 5 hours overall. In carbon steel, the carbon content is King. AR400F has a minimum Brinnel hardness of 360. Altering the Chip Load or RPM settings in any way without prior written approval from an authorized agent of CGC/Gorilla Mill will void any guarantee or warranty nor will CGC/Gorilla Mill or its agents be liable for any. I’ve done some reading here and elsewhere online about feeds and speeds and getting myself up to speed. *The RPM and Chip Load that automatically populates in this calculator are the factory suggested parameters for running the desired tool. Feed Rate = RPM x Chip Load x Number of Teeth. I would not generally try to make the cut and finish in one pass, I do the rough cutting first at whatever feed rate and depth I can get away. The carbon content provides strength and hardness, while the manganese. 125”) diameter cutter instead of a ¼” (. I’m wondering how hard i can push the Onefinity and what it may be able to handle. Milling operations. I have some 5/8" solid carbide endmills that i would like to try a trochodial tool path with, basically just for practice and to test this kind of tool path. 001″–a thousandth of an inch. 3. Hello, I bought the Amana AMS-119 starter kit with my Shapeoko 4. The biggest thing is having the right tooling to do the job which is the hardest/most expensive part. 020″! To select a V-Bit in G-Wizard, treat it like an endmill. 2 225 128 320 125 0. This product is intended for applications where a good combination of abrasion. Both of which are sold and stocked in dFab. And, depending on the machining application and workpiece material, feed rates in excess of 0. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. Optimizing feed rates and speeds: 1. AR400, also known at Ford Steel as Wearalloy 400, is a high-carbon steel with a nominal hardness of 400 and a minimum hardness on the Brinell scale of 360 to 440. However it seems the Speeds and Feeds I'm using are not doing too well in tool longevity/noise/smell. Jun 25, 2009 #9 Follow up. milling speeds & feeds carbide tipped class of materials material application - mills and saws brinell surface feet per minute (sfpm) inches per tooth (ipt) non-ferrous (soft) aluminum alloy - wrought 30-150* (500kg) 1000-2000 . 0063 (Pitch / 8) Z axis move for full thread 0. It looks like metal slats sticking out, and they are skip welded with (probably 7018). 002 - . (3. at 20 IPM with a . 5deg pressure angle. Speeds To determine optimum speed, start at the lower end of the speed range, and then increase speeds until performance is maximized. 0625" wide by half inch deep. Then we use the cutting speed from the table to calculate RPM with one of the following formulas: Metric: RPM =1000 x cutting speed / pi x D (mm) where D is your tool’s diameter in mm. 70: Thickness: 2-4 microns: Surface Roughness (R a mm):. Due to its extreme hardness, AlgoTuf 500 is rarely machined. 27. Use strong flood coolant, speed around 10-12 SFM, as much feed as your machine & drill point can stand - . I’d like to cut some hardwoods like mahogony with. 005 IPR. 0008─. Grind the cutting edge for the least relief possible to avoid chipping. 4-3. GoodCalculators. . If you're not taking a lot of material out then the number of flutes isn't a concern, I've used 4 flute cutters when finish milling pocket walls. A chart is only 2 dimensional. See the gitbook link in Will’s post for explanations of those. AR400F is quenched and tempered through hardened wear resistant grades of abrasion resistant steel plate used for high impact and abrasion resistance. I have a 4. Complicating. 2. Thin the web to reduce drilling pressure. This makes TiAlN very effective in high-temperature alloys, high-speed machining, and dry milling applications. Use Higher Feed Rates in Soft Materials. Used for up to 62 HRc hardened steel, titanium, nickel-based alloys and stainless steel at high speeds and medium feeds. I have a 4. 059 1/4 0. This lesson covers how to determine the proper Feeds and Speeds for your material and save that to the Cutting Data section of the tool, in the Fusion 360 tool library. ( guessing AR400). The machinability rating attempts to quantify the ease of machining of a range of metals. MMPM = RPM X number of teeth X CLF X MMPT. AR400 steel is known for its exceptional mechanical properties, particularly its high tensile strength and hardness. 9% chromium gives it a lot more hardness. Tool Library Cutting Data. These straps are 15-1/2" long. T - Number of Teeth. The AR400 is a true dual circuit (R-12 and R-134a) Refrigerant Handling machine. A tough and highly wear resistant grade. 15% and below creates ductile steel with unbreakable chips. And, depending on the machining application and workpiece material, feed rates in excess of 0. It seems that very few people take advantage of the variations of the surface speeds. 4 flute mill. 03-. Joined Oct 31, 2007 Location Miami Fl, USA. 5mm DoC (320mm/min per tooth). I have some 5/8" solid carbide endmills that i would like to try a trochodial tool path with, basically just for practice and to test this kind of tool path. 010″ depth of cut is only 0. I'm using an older Hurco KMB-1 that's in. Cermets should not be used for rough copy turning. If it seems to jerk around too much, set your max high speed to a slower value like maybe 100 ipm as this affects how fast the machine loops around when the tool is out of the cut. 75 inches diameter. 15 250 0. #5. Feed Rate = 25000 * 2 flutes * . RPM = Of the tool or workpiece. Use Higher Feed Rates in Soft Materials. 0. All I had for my mill at the time was a 1/2" chuck. Speeds and feeds, mfg charts are there for a reason. 004-. 0020)I drilled some 1/2" AR400 plates for a teletram truck. find the calculated feed rate. Therefore, it only covers 2 variables. 350 mm 3/8 in. From a reference, 'Machining Stainless Steels' here are some feed and speed suggestions; Carbide Turning doc . We have found that the optimal cutting RPM for acrylic with the recommended O-Flute bit above is 18,000 RPM. 001" (0. By referring to the chart, you can select. To calculate the speed of rotation from the recommended cutting speed : Example for drill diameter D = 15 mm and cutting speed v c = 80 m/min. Material Aluminum/Aluminum Alloys Aluminum Alloyed > 10% Brass Bronze Cast Iron (Soft) Cast Iron (Medium) 570 Series # 5510 Series # 5511 Material group Hardness SFM Feed Rate - IPR HRC BHN 1/16 in. COM presents the material machinability chart shows the machinability of metals and plastics. MMPM = mm per minute MMPT = mm / tooth. 9km/h Speed High: 1. Cermet Evolution Linear feed 54. 052 drill bit (#55). Increased production levels at higher feeds and speeds and longer tool life in high heat applications are the primary benefits. Algoma recommends the following milling speeds, feed rates, etc. 4 - 62kW (83Hp) Stage V and Tier 4: Caterpillar C2. 0012 (. It's a variable speed motorized carriage with a torch mount and a guide rail. 005 inch/revolution Adjusting feed rate to about 3. 5 Same as above. As you may note, cutting speed is shown in range terms. 2 - 55kW (74Hp) Determine the spindle speed (RPM) and feed rate (IPM) for a milling operation, as well as the cut time for a given cut length. Wow 1200 rpm sounds painfull slow for a diameter of 1/16". The feed rolls on each side have these worn gripper strips that need replacing. $69. 1 249 128 320 124 0. Alro Industrial Supply specializes in cutting tools, abrasives, coolant and MRO supplies. They are 1/4 " thick, and stick out 5/8". 0025 in 1018 CRS. Using an RPM of 15,280 would give a feedrate of 122 in/min. pdf. Drilling Speed and Feed Calculator. I have a 4. According to Accupro End Mill, the optimal feed rates range from 0. 1416 x Part Diameter, Divided by 12 x RPM HORIZON CARBIDE TOOL, INC. High Speed – Depth of Cut . 001 to 0. 0625" wide by half inch deep. Easily weldable with an E7018 rod. Section 1 – Main parameters: Cutting speed, feedrate, Feed per Tooth, spindle speed, and table feed. AR400 steel has a variety of benefits that makes it an ideal substitute for almost any application where excessive wear is a problem and ease of fabrication is needed. I've been working with AW36 steel and 304 Stainless. 4 mm per inch so 25. I have some 5/8" solid carbide endmills that i would like to try a trochodial tool path with, basically just for practice and to test this kind of tool path. Hardness (Vickers): 2800 (85 Rc) Oxidation Temperature: 800°C (1450°F) Friction Coefficient:. Abrasion resistant steel is created by quenching and tempering forged steel plates. SFM: Tool Diameter: RPM: = Surface Feet per Minute: RPM : Tool Diameter: SFM: = Revolutions Per Minute: IPM (Drilling) IPR:A basic Feeds and Speeds Chart like what’s in your tooling catalog is a 2 dimensional entity. With the map. 05 inches per tooth. 9. Jan 3, 2023 #1 Hi guys, Whenever I try to do my finishing cut on a hardened steel (63HRC) using a cnc lathe machine, my tool inserts always break. These values correspond to a cutting speed of ~6m/min, which is a ~1/15 of the cutting speed needed for steel. 0625" wide by half inch deep. 2 225 128 320 125 0. 1 – Feeds and Speeds options on the Tool Page for a Profile Rough Operation. Learn about our quality system and how we can deliver next day! A basic Feeds and Speeds Chart like what’s in your tooling catalog is a 2 dimensional entity. A bunch of 1-1/8" holes. need a little help feeds/speeds in ar400. I'm predrilling it using a . 82) / Diameter of the Tool. 250 sfm 175 feed . Problem is, unlike most manufacturers. So cobalt drill bits better absorb stresses to higher absolute temperatures. 6. Carbide – Depth of Cut . 568. I'm guessing the material is some type of AR plate ( guessing AR400). Exclusively Distributed By Industrial Supply Co. 1. The "speeds" part of the speeds and feeds calculator is the rotation speed of either the tool (e. 350 mm 3/8 in. 057 3/16 0. I'm needing to machine several stepped pockets in some AR400 steel plate. 80 IPM / (16,000 RPM x 1 Edge) = . I don't do much machining on anything but aluminum, delrin, and the occasional mild steel or brass so I'm not too up on hard machining. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. Formulas for external thread milling Calculated. Feeds and speeds and calculators are a good starting point but it all depends on what the machine can actually handle. Technical Data Kromite® #3 and Mirraloy® TGP Machining Guidelines GENERAL MACHINING GUIDELINES. For a 0. 6) Do an internet search for a chipload calculator to calculate chipload FREE 7) Adjust your speed and feed to best suit YOUR. Important Disclaimer: The Accupro speed and feed rates are suggested by the manufacturer as a general guideline. The tensile strength of A514 alloy steel is specified as at least 100 ksi (689 MPa) up to a 2. I have a 4. Calculations use the desired tool diameter, number of teeth, cutting speed, and. Material Aluminum/Aluminum Alloys Aluminum Alloyed > 10% Brass Bronze Cast Iron (Soft) Cast Iron (Medium) Cast Iron (Ductile) Cast Iron (Malleable)570 Series # 5510 Series # 5511 Material group Hardness SFM Feed Rate - IPR HRC BHN 1/16 in. This velocity is called the "feed" by machinists. The main cylinder has a mid-trunnion mount for superior strength, balance and longevity. T-1 steel, unlike AR400, is an alloy steel covered by ASTM A514 / A514M - 05 (2009) Standard Specification for High-Yield-Strength, Quenched and Tempered Alloy Steel Plate, Suitable for Welding. Power Route 1/4" 2 flute at 24000 rpm (max speed) on MDF is 172. Depending on the material, variations of the feed rate may be necessary in order to secure desirable results. Quite brittle, need to be more careful about cutting (use small chipload [0. 5 85 129 122 127 0. We have a beefy drill press that would be up to the job but the lowest speed is 300rpm. with a 18/" 2F. Chip loads can vary quite a bit. 18, Chipload 0. com is the easiest speeds and feed cacuator to use. 059 1/4 0. Adjust RPM & Feeds after Setup to achieve Optimum Tool Life. 2mm DoC. Alpharetta (Atlanta Plate Processing) 2005 Grassland Pkwy. A chart is only 2 dimensional. 006 Recommended Feed Rate: . Joined Aug 9, 2010. 010-0. pak Cast Iron. The HyPerformance ® HPR400XD ® plasma system has been designed and built for maximum performance and productivity in X-Y, bevel, and robotic cutting operations. I have a 4. They give you ranges that are tough to interpret when you just want the answer. It’s easy to compute Feeds and Speeds to compare these two face milling solutions using our G-Wizard Calculator software (click the link for a free 30-day trial if you’ve never played with G-Wizard). Originally posted by Sonora Iron View Post. Drilling can be done with any high-speed drill. x or even . 001" on the total. The formula for spindle speed (rpm) is cutting speed (sfm) 5 3. Drilling operations are those in which a cutting tool with sharp teeth, such as a twist drill, rotates and feeds into the workpiece axially, forming a hole with a diameter equal to. 6km/h OPTIONS • 6mm AR400 steel wear feedboot liners • 20mm rubber wear feedboot liners • Feedboot extension c/w steel wear linersI am using a Techniks Nexus . See full list on associatedsteel. Determine the spindle speed (RPM) and feed rate (IPM) for a milling operation, as well as the cut time for a given cut length. 0625" wide. TV . 8 33 136 38 133 0. 5 inch (63. Questions? Contact Cleveland technical support at 888-434-8665. 125 = 15,280rpm. Surface Speed (SFM) FEED PER REVOLUTION BY DRILL DIAMETER (IPR) 1/16" 1/8" 1/4" 1/2" Low Carbon Steel 1018, 12L12, 1108, 1213 ≤ 120 5374 250 0. A bunch of 1-1/8" holes. zip (792 Bytes) Here is a version which has the Amana feeds and speeds copied into it — breaking this up and naming it appropriately by appropriate materials. ” Soft wood Name SB# Onsrud Series Cut Chip Load per leading edge Flutes Feed Rate (ips) Feed rate (ipm) RPM Max Cut 1” 60 degree Carbide V cutter 13648 37-82 1 x D . For End Mills with Overall Lengths over 4” decrease the Feeds and Speeds. Cobalt alloys are widely used because of such reasons: Cobalt alloys have high hot corrosion resistance. com. We are still using a Single Cutting edge tool. Forum - The expert community . AR400 steel has a variety of benefits that makes it an ideal substitute for almost any application where excessive wear is a problem and ease of fabrication is needed. 012 ipr limit, the cutting speed should be reduced. 30% but the addition of 0. Machining Advisor Pro quickly, seamlessly, and accurately calculates recommended speeds and feeds for running your Harvey Tool and Helical Solutions end mills. 053 14 GA 0. Remember that when you increase the depth of cut you need to reduce either the width of cut or the feed speed to keep the same cutter load. There is some info on the box, but it doesn’t have the same terminology as in Carbide Create, so I’m a little lost. 5 amps. Here’s a typical cut set up for 90 degree Face Mills / Shell Mills: G-Wizard set up for a 90 degree face mill…Guideline 4 – Set The Correct RPM. Optimizing feed rates and speeds: 1. Always use the correct drill size when drilling the hole before you ream it. The angular velocity of the workpiece (rev/min) is called the "spindle speed" by machinists. 015 inch/revolution Tooling M1, M2, T15, M33, M41, M47. AR400 is a very hard abrasion resistant steel used for rock truck beds and other high wear items. These versatile tools can save time and effort while providing clean, precise holes in various materials. The CoroPlus®. Note that these speed and feed values are guidelines assuming adequate (flooded) lubrication and workpiece stiffness. , for its heat-treated plate grades, depending Grade 316 is more prone to work hardening, so you need to invest more effort into preventing that. Cobalt alloys have good thermal weldability and fatigue resistance. If process temperatures get too high hardess drops significantly. 85 KBAR 400 plate. Feed Rate f (mm/rev) H Type L Type G Type ACP300ACP300 ACM300 ACK300 DL1500DL1500 M Stainless Steel Steel P (High-speed Drilling) Cast Iron K (High-speed Drilling) Cast Iron K (General Drilling) Non-Ferrous N Metals Grade Work Material P Steel (General Drilling) ACP100ACP100 L Type P K G Type P K H Type P K H P G P M L Type P M Type L Type P K. 0040 0. More products like this. Here is a . JMG Aluminum. 2-0. If it seems to jerk around too much, set your max high speed to a slower value like maybe 100 ipm as this affects how fast the machine loops around when the tool is out of the cut. g. AR500: 460-544 BHN Typically. The term "feeds" refers to the feed rate or the relative linear speed between the tool and the workpiece. Solid Carbide Drills Speed & Feed Recommendations TECHNICAL INFORMATION . Worked fine. need a little help feeds/speeds in ar400. Recommended feeds and speeds for turning a hardened steel (63 HRC) Thread starter OVO345; Start date Jan 3, 2023; Replies 18 Views 1,125 O. 053 14 GA 0. Just for an. 5 85 129 122 127 0. I have a 4. They are time savers, especially for larger size holes. Quick Links . 5 amps. 254 RPM = 12. I have a 4. 16,000 (RPM) x 1 (cutting edges) x . 82 / . If you play with the formulas enough you will notice that you can get the same Chip Load with different Feed or RPM numbers. Compared to E70T-4, they offer slightly lower deposition rates of up to 30 pounds per hour, but they offer a smoother welding arc and Charpy impact toughness properties. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. 004-. Work at a slower speed and higher feed than if you were machining 304. Cut Speed Voltage Cut Speed Voltage inches inches inches % seconds in/min volts in/min volts inches 16 GA 0. • Speed equals 80 surface feet per minute in 100 Brinell hardness material and the speed should be reduced 10 surface feet per minute for each additional 50 points Brinell hardness. Drilling & tapping 12x12 AR400. The first plate I cut was fine the angle was fine, but it looks blistered. Norm right from Lincoln. Easy Speeds And Feeds only serves as a starting point and educational site. 1. Alpharetta, Georgia 30004. In addition, the correct cutting tools are also required, and HMT have. (See Fig. Give us a call at 800-348-2529 or leave us a message. 150” Speed 260 brazed, 330 throw-away Feed . com website, you can access this tool online and open it in your browser. Mastering the use of spade drill bits is essential for any CNC Machinist. Cut dry, air blast or MQL with your TiAlN carbide mills. Hey guys, I'm starting to use my newly aquired Hurco VM1 and loving it. Handwheels: 90 mm OD, 8 mm bore. Anodized handwheels for apron and tailstock. I have some 5/8" solid carbide endmills that i would like to try a trochodial tool path with, basically just for practice and to test this kind of tool path. 1/0. Hardox® 450 is an abrasion-resistant brand with a hardness of 450 bhn. Every metal cutting operation requires selection of proper cutting parameters for success. 0625" wide by half inch deep. 5 inches and has a 6 inch diameter target face. IPM = Inches Per Minute (Feed) D - Cutter Diameter. . I have a 4. 002 - . RPM - Revolutions per Minute (Speed) IPT - Inches Per Tooth (Chip Load) IPR - Inches Per Revolution. Specs are: Total Length: 50MM. 005" per tooth or probably about 50 ipm on your machine. Or just double both to 508 RPM and 15 IPM. Feeds - Metric. This is how fast your tool is spinning, but not how fast the flutes are moving. 0625" wide by half inch deep. Acron Nuts: M8 threading. 25/200 = 4 ipm This a starting point, I usually crank down a little from these recommended settings to see how. Consult a Monitor or Manager for any/all other foam materials. 015 inch/revolution Tooling C6 (Cutting Fluid: Soluble. For hard metals reduce cutting speed. Now I usually trust FSWizard for flat end mill and twist drill feeds/speeds. IC903 H01-H10 P05-P15 M10-M20 S10-S20 AL-TEC TiAIN Ultra-fine grain carbide with 12% cobalt, TiAlN PVD coated grade. 2-3% of the diameter. Surface Speed (SFM) cutting tools, speeds and feed rates. Increase the cutting speed (feed rate) until the quality of the part’s finish starts to decrease or the part is starting to move from hold downs. Compared to E70T-4, they offer slightly lower deposition rates of up to 30 pounds per hour, but they offer a smoother welding arc and Charpy impact toughness properties. 25mm pitch tap. Spade Drill Speeds and Feeds and Ultimate Guide. Liberal amounts of a good coolant are essential. IPM = inches per minute IPT = inches / tooth. For Milling, Turning, Drilling, Grooving, and Parting off. I also do a peck of Q. As a result, customers can expect longer-lasting wear parts in some of the toughest applications. Annular Cutter Speeds and Feeds Calculations (Manual Machine) [RETURN TO QUICK LINKS] The highest deposition rate gas-shielded flux-cored wire is E70T-1. SpeTool Fusion 360, SpeTool tools database, SpeTool tools file, SpeTool database, SpeTool library, SpeTool feeds and speeds. I only have a few to make and no time restraints, so this is a. Extremely loud; no doubt of hits and misses. Vbit feeds and speeds are weird, there is basically no great universal formula or at least I was not able to crowdsource one from the collective brain on this forum, the best guideline. Exclusively Distributed By Industrial Supply Co. Start off using an RPM derived for the chip load for the material being cut (see charts). 125 = 15,280rpm.