9% chromium gives it a lot more hardness. AR400 steel is known for its exceptional mechanical properties, particularly its high tensile strength and hardness. When applying oil manually (as in the lab), scale the feed and speed back to 60%, so N = 330 rpm and f = 2. 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. 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. Mill top and discharge flanges allow easy mounting of in-feed and discharge chutes or hoppers . I am thinking we need to be much faster RPM but I don't want to go. This product is intended for applications where a good combination of abrasion. The speed and feed are just ridiculous; something like 800 to 1000 rpm and maybe 10ipm feed with lots of coolant should work. Joined Oct 31, 2007 Location Miami Fl, USA. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. 5 inches and has a 6 inch diameter target face. com. 8-0. Jun 25, 2009 #9 Follow up. I have a 4. I was thinking of starting at about 1200 RPM and . Not commercial, just for me. Forming can be done in cold forming conditions. The Calculator divides the results into 3 sections. The Speeds and Feeds Calculator uses the following formulas: RPM = (12 * Surface Speed) / (PI * Tool Diameter) [revs/min] Feed Rate = RPM * Chip Load * Number of Teeth (Flutes) [in/min] Where PI is the constant (3. No chart will. Always start with your feed at 50% or below. Speed and Feed Recommendations SPEEDS and FEEDS are suggested starting points only and may be increased or decreased depending on actual material and machining conditions. . Exclusively Distributed By Industrial Supply Co. 05 inches per tooth. 205 for that hole, gives you about 68% of thread instead of over 70%, feed rate at 2. 0. • Feed equals . Hardox® 450 is an abrasion-resistant brand with a hardness of 450 bhn. 08-30-2008, 06:56 PM. More products like this. 072mm/teeth. 700" depth and . 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. 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. Drilling & tapping 12x12 AR400. Cermets should not be used for rough copy turning. 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. The drill point should never squeal until it starts to dull. Number of Teeth = The number of edges, facets, or flutes. 0030 0. 0625" wide by half inch deep. Quick Links . 875 dia indexable drill in the Haas ST 10 Lathe. Cast iron/Ductile Iron. Important Disclaimer: The Accupro speed and feed rates are suggested by the manufacturer as a general guideline. 8 33 136 38 133 0. G-Wizard’s cutting physics engine considers nearly 60 variables. The chart includes a range of materials, cutting operations, and corresponding recommended feed rates and spindle speeds. 69 Linear feed • ((Major thread Ø - Tool Ø) / Major thread Ø) Z axis move on arc on 0. 001" on the total. The next issue would be the feedrate. (mm per tooth) Z= RPM, the speed at which the cutter revolves in the spindle. 254 RPM and 10 IPM. Machine type, horsepower, spindle speed limitations, tooldholding & workholding devices all may impactHere is a diagram showing the effective diameter for a 90 degree V-Bit with a 0. Anodized handwheels for apron and tailstock. When feed rates approach the 0. It refers to choosing the speed at which to spin the cutting tool, and how. It's on an already built unit so I can't substitute another steel. A lathe feeds and speeds chart is a handy tool that provides the necessary information regarding the appropriate feed rate and spindle RPMs to optimize machining performance. Adjust RPM & Feeds after Setup to achieve Optimum Tool Life. We are still using a Single Cutting edge tool. 16,000 (RPM) x 1 (cutting edges) x . Grind the cutting edge for the least relief possible to avoid chipping. com S3_feeds_250. Seems a bit fast. With the map. This makes TiAlN very effective in high-temperature alloys, high-speed machining, and dry milling applications. 012 ipr limit, the cutting speed should be reduced. 2mm DoC. I have a 4. 001" per revolution for every 1/16" of drill diameter, plus or minus . 004-. Start off using an RPM derived for the chip load for the material being cut (see charts). While you can use a faster RPM, you might have to increase your feed rate to prevent melting of the plastic. 0 2,7DC 130 (100─150) . It refers to choosing the speed at which to spin the cutting tool, and how. The feed rolls on each side have these worn gripper strips that need replacing. , 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. [email protected] reamer should I go 4500 RPM and 26 in/min feed rate?medium to high cutting speeds. Consult a Monitor or Manager for any/all other foam materials. 3. Our tests have shown the above to give the best results, but there may be a slight. The Speeds and Feeds Calculator may be employed for calculations of estimated speeds and feeds (RPM and IPM) values on the basis of the parameters you have currently set based on your tools and stock material. 14. At present, the AR material with or without the “F” is interchangeable,. 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. Its tensile strength ranges from 155,000 to 180,000 psi, while its Brinell hardness ranges from 360 to 440, depending on the thickness of the steel. Overall height of 14. I'm predrilling it using a . High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS (354) In actual use, depending on the machine environment and workpiece material, significantly higher speeds & feeds may be achievable. Joined Oct 19, 2022. It's the best one I've seen yet. Hammermill's idea of the annular cutter sounds good. If not, stop regularly to reapply oil or coolant. Spindle speed: 16,400 RPM Max pass depth: 0. Both of which are sold and stocked in dFab. 18, Chipload 0. 020″! To select a V-Bit in G-Wizard, treat it like an endmill. 4 129 128 181 128 0. 75 inches diameter. 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. I don't have any data on feeds and speeds - currently using 500 rpm ( 114 SFM ) with F. Bill3D • 6 yr. The increased deposition rates that metal-cored wires offer help increase travel speeds and decrease the number of passes required to make a weld. 5deg pressure angle. The formula for feed per tooth (fpt) is table feed (ipm)/number of flutes/spindle speed (rpm). 82/tool diameter. Abrasion resistant steel is created by quenching and tempering forged steel plates. 0015 0. 16 RPM • Feed per flute • Number of flutes Feed rate for thread milling 12. TV . The tensile strength of A514 alloy steel is specified as at least 100 ksi (689 MPa) up to a 2. The first plate I cut was fine the angle was fine, but it looks blistered. Forum - The expert community . For instance my shop neighbor’s calculator says to run a 1. 5 amps. Power Route 1/4" 2 flute at 24000 rpm (max speed) on MDF is 172. Don’t forget to lubricate while working with stainless steel. To machine 304 stainless steel, you should machine it at slower speeds. 0625" wide by half inch deep. 150” Speed 70 fpm Feed . As a result, customers can expect longer-lasting wear parts in some of the toughest applications. Then decrease speed by 10%. 2020. 005 IPT. 15 -> MRR 1. Then try RPM setting 1, 640mm/min and 0. Keep in mind that slowing feed also needs to adjust RPM to maintain chipload. For example, for drilling, it is the speed at which the drill bit travels down into the workpiece material. Gradually bring the feed rate up while monitoring chatter and spindle load. A line drawing showing some basic concepts of speeds and feeds in the context of lathe work. So for my . need a little help feeds/speeds in ar400. Re: Cutting aluminum - Share feeds and speeds. Therefore, it only covers 2 variables. *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). Sophisticated feeds and speeds software lets you master a lot more variables than you could manage. need a little help feeds/speeds in ar400. calculate from the cutting speed of the closest diameter. 15 250 0. AR400- better for impact applications, AR500- better for sliding applications. Feeds - Metric. Always feed in and feed out when reaming. The maximum cutting speed depends on the type of coating on the tool and the maximum temperature it can safely withstand. 0063 (Pitch / 8) Z axis move for full thread 0. 25/200 = 4 ipm This a starting point, I usually crank down a little from these recommended settings to see how. 1 249 128 320 124 0. (See Fig. Hey guys, I'm starting to use my newly aquired Hurco VM1 and loving it. 06 0. They are time savers, especially for larger size holes. 0020)I drilled some 1/2" AR400 plates for a teletram truck. Easy Speeds And Feeds only serves as a starting point and educational site. AR400 steel target, exceptional portability and . Carbide – Depth of Cut . I've heard the rule of thumb is twice the feed and half the RPM. Water based coolant works well; if not using coolant then max surface speed is 125 ft/min. 95. Specs are: Total Length: 50MM. In BobCAD-CAM, these feed and speed values can be found on the Tool Page of each operation, inside the feature wizard. 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. 95. These straps are 15-1/2" long. 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. High torque, slow speed, geared magnet drills, like the VersaDrive series from Holemaker Technology, and ample Biocut blue lubricant are essential. Liberal amounts of a good coolant are essential. A2 is a nice material. Questions? Contact Cleveland technical support at 888-434-8665. 077 5/8 Edge Start 13 146 16. 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. 020" radial on a necked version hanging out 3" overall from. 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). 054 10 GA 0. Easily weldable with an E7018 rod. 6) Do an internet search for a chipload calculator to calculate chipload FREE 7) Adjust your speed and feed to best suit YOUR. 25 = 1600 Your feedrate should be: Feed Rate = 1600 x 2 x . Category overview ; List of all discussion forums ; The 100 latest forum topics ; IndustryArena. The next issue would be the feedrate. When milling steel, the feeds and speeds will be all over the place since it depends on the grade of steel, the material of the tool, the depth and breadth of the cuts, the number of flutes, and so on. See the gitbook link in Will’s post for explanations of those. . Throw away those old speeds and feeds charts and pdfs. It takes multiple charts to cover maybe 3 or 4 dimensions. We have found that the optimal cutting RPM for acrylic with the recommended O-Flute bit above is 18,000 RPM. These values correspond to a cutting speed of ~6m/min, which is a ~1/15 of the cutting speed needed for steel. 012 ipr should be avoided, because thicker chips may damage the cutting edges. 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. com is the easiest speeds and feed cacuator to use. 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 . The slowest the Makita will turn is 10,000 rpm. But running work at proper feeds and speeds is the best way to cut clean holes and tap stainless steel most efficiently. 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. 005 IPR. 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. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. . Due to its extreme hardness, AlgoTuf 500 is rarely machined. Therefore, it only covers 2 variables. 3. I have a 4. 3MM Tip. The formula for cutting speed (sfm) is tool diameter 5 0. AR400 steel has a variety of benefits that makes it an ideal substitute for almost any application where excessive. 061 3/8 0. It's a variable speed motorized carriage with a torch mount and a guide rail. 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. G-Wizard's Feeds and Speeds for V-Bits assume a rigid holder, but you can double the feedrate if you have a spring-loaded holder. steel, hard alloys and carbon steel at medium to high cutting speeds. The "speeds" part of the speeds and feeds calculator is the rotation speed of either the tool (e. Adjust RPM & Feeds after Setup to achieve Optimum Tool Life. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. Material: Feed Rate (mm/ min) Plunge Rate (mm/ min) Step Over:For deep hole drilling reduce speeds by 10% for 3xDiameter, 20% for 4xDiameter, 30% for 5xDiameter and 40% for over 6xDiameter. It offers higher deposition rates than GMAW, handles dirtier plates, and uses lower cost 100% carbon dioxide. BHN signifies the hardness level of the material: AR400: 360-440 BHN Typically. #5. Using a ⅛” (. need a little help feeds/speeds in ar400. Imperial: RPM =12 x cutting speed (feet per minute) / pi x D (inches) D is your tool’s diameter in inches. I was thinking of. This has been helpful to get an idea. Adjusting feed rate to about 3. This would be in the range of a typical cnc router. 1. The Wiki feeds and speeds are either a specific example from someone’s project or copied from an older set of feeds and speeds: docs. Speed and Feed Recommendations SPEEDS and FEEDS are suggested starting points only and may be increased or decreased depending on actual material and machining conditions. Section 1 – Main parameters: Cutting speed, feedrate, Feed per Tooth, spindle speed, and table feed. Quenching occurs by bringing the steel to a high temperate, between 1,500 and 1,650F, then is. Throw away those old speeds and feeds charts and pdfs. Carve King: 1/4" 2 flute at 27000 (max speed) on MDF is 140. Tool: 1/64" flat end mill Feed rate: 59 in/min (1500 mm/min) Plunge rate: 15 in/min (381 mm/min) Spindle speed: 16,400 RPM Max pass depth: 0. find the calculated feed rate. They give you ranges that are tough to interpret when you just want the answer. I have a 4. Given the surface speed, you can calculate the spindle. Spade Drill Speeds and Feeds and Ultimate Guide. 77 PROMAX Premium FEEDS & SPEEDS PROMAX PREMIUM Series 109 - Aluminum Alloys & Non-Ferrous Materials (Continued)In the long run it makes more sense than using an external reference to determine speeds and feeds. Worked fine. Machining Advisor Pro quickly, seamlessly, and accurately calculates recommended speeds and feeds for running your Harvey Tool and Helical Solutions end mills. 125”) diameter cutter instead of a ¼” (. 007 chipload per tooth = 350 IPM. 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. According to the accompanying table, the maximum cutting speed is 280mm/min and the chip load is 0. Calculate the Speeds and Feeds of Carbide End Mills, Diamond End Mills, and Plastic Cutting Carbide End Mills with these General Machining Guidelines. 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. 27. 0025 in 1018 CRS. I do not machine plastic often. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. Used for up to 62 HRc hardened steel, titanium, nickel-based alloys and stainless steel at high speeds and medium feeds. 2-0. Speeds and feeds, mfg charts are there for a reason. The formula for spindle speed (rpm) is cutting speed (sfm) 5 3. at 20 IPM with a . 001 to 0. AR400F has a minimum Brinnel hardness of 360. 0625" wide by half inch deep. 5425 N Whitaker Road. com is the easiest speeds and feed cacuator to use. 005" per tooth or probably about 50 ipm on your machine. Cobalt alloys have good thermal weldability and fatigue resistance. 0625" wide by half inch deep. 2020. Now, a typical 1/8″ carbide endmill might have a total chipload allowance of 0. The versatile 400-amp rated system combines fast cutting speeds, rapid process cycling, quick changeovers and high reliability, and delivers the ultimate in HyPerformance mild steel. I have a 4. 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. G-Wizard's cutting physics engine considers nearly 60 variables. slotting depth of . 0. xx feeds. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. 06 0. 008 magnesium alloy 50-90* 750-1500 . They are often considered as a pair because of their combined effect on the cutting process. AR450: 430-480 BHN Typically. 82 / . 008 non-metal and plastic – 1500. A bunch of 1-1/8" holes. Here CNCLATHING. 015 inch/revolution Tooling M1, M2, T15, M33, M41, M47. The HyPerformance ® HPR400XD ® plasma system has been designed and built for maximum performance and productivity in X-Y, bevel, and robotic cutting operations. AR400F has a minimum Brinnel hardness of 360. More products like this. A chart is only 2 dimensional. com Cut about 20% stepover amount in your toolpath settings. Optimizing feed rates and speeds: 1. The machinability rating attempts to quantify the ease of machining of a range of metals. RPM = Of the tool or workpiece. $69. As a DML TA, you need to understand basic calculations that will allow the tools you use to work as intended. AR400F is produced through austentizing, water quenching, and tempering. 0054 in/tooth. The Tensalloy ™ AR400 wear-resistant steel plate is a steel that provides greater impact strength than our other common heat treated alloys. g. RPM and FEED can be adjusted to maintain chipload, and feed can be slowed to account for a less than rigid machine. IPM = Inches Per Minute (Feed) D - Cutter Diameter. 5% gives you . 95. 5 inch (63. 15 250 0. 001" (0. Using an RPM of 15,280 would give a feedrate of 122 in/min. 9. 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. 9. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. 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. 077 5/8 Edge Start 13 146 16. 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. 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. 4, WOC 0. 0256 (Major thread diameter - Tool diameter) / 4 Full rotation value. Does anyone know what the proper speed and feed and depth of cut should be for a gear cutter with the following specs: #3 cutter. I have a 4. with a 18/" 2F. 059 1/4 0. Investigators think a deadly crash Wednesday morning at the Rainbow Bridge, which links the US and Canada, involved a man who was traveling with his wife. Speeds To determine optimum speed, start at the lower end of the speed range, and then increase speeds until performance is maximized. 1416 x Part Diameter, Divided by 12 x RPM HORIZON CARBIDE TOOL, INC. 006 MT7 MT7 ISO Materials Cutting Speed ft/min MT7 PGeneral feeds and speeds using a 1/8″ single flute flat aluminum cutting end mill. Horizon Carbide Grades are Designed to provide Long Tool Life at Higher Speeds and Light Feed Rates. 0027 in/tooth chip load. Optimizing feed rates and speeds: 1. 3. 015 inch/revolution Tooling C6 (Cutting Fluid: Soluble. 4x10 RPM = 1. A tough and highly wear resistant grade. Drilling can be done with any high-speed drill. IC903 H01-H10 P05-P15 M10-M20 S10-S20 AL-TEC TiAIN Ultra-fine grain carbide with 12% cobalt, TiAlN PVD coated grade. That is a chipload of 0. 0 amps on the VFD drive. 141592654). As with other abrasion resistant steels, it does not have a defined chemistry, but rather, grade is determined based on. Machining AR400 steel plate. AR400 steel is a high-carbon alloy steel that is specifically designed for abrasion and wear resistant applications. Cermet EvolutionLinear feed 54. Shank Diameter：6MM (I have a 6MM collet) Cutting Angle: 15 Degree. Thread starter JMG; Start date Apr 30, 2012; Replies 0 Views 1,681 J. I have a customer that has a large wood chipper. Used for up to 62 HRc hardened steel, titanium, nickel-based alloys and stainless steel at high speeds and medium feeds. Start off using an RPM derived for the chip load for the material being cut (see charts). I drilled a 1/4" pilot, and then drilled to 1-1/8" with a 118 deg 1/2" shank S&D bit. 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. My question is what starting feeds and speeds would you recommend? I have carbide mills and the machine is a 7HP maintained Fryer toolroom mill. Alro Industrial Supply specializes in cutting tools, abrasives, coolant and MRO supplies. I need to turn AR400 Plate with a 5° angle on the edge. Abrasion resistant. New and popular video trendsAR400 Steel Plate AR400 Steel Plate – Hardness 360-444 Brinell. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. I only have a few to make and no time restraints, so this is a. Speed and Feed Calculator. It looks like metal slats sticking out, and they are skip welded with (probably 7018). Questions? Contact Cleveland technical support at 888-434-8665. As a result, customers can expect longer-lasting wear parts in some of the toughest applications. 5 85 129 122 127 0. Take time to go through the “Setup the Machine Profile Tour” and the “Feeds and Speeds Real World Examples” at the very least. I'm gonna disagree with machinability, we've been able to mill, drill etc 400, 500 and 600 there's not a great deal of difference between machining them. Extremely loud; no doubt of hits and misses. 0256 (Major thread diameter - Tool diameter) / 4 Full rotation value. Hey guys, I've had to build alot of aggergate discharge shoots over the last 20 or so years and most of them were built. For the feed rate per revolution, please set up within the recommended feed rate of the closest diameter appropriately. AR400 is a quench and tempered steel and may be difficult to weld due its high strength and hardenability. Exclusively Distributed By Industrial Supply Co. The "feeds". AR400F is produced through austentizing, water quenching, and tempering. Forum - The expert community . They use multiple charts, add columns and rules of thumb to cover a few more variables–maybe 4 to 6. 2. 004-. 2. These straps are 15-1/2" long. . Hardox® 450 is an abrasion-resistant brand with a hardness of 450 bhn. For general profiling I like Maritool variable flute endmills and his speed feed chart is pretty well spot on. They are 1/4 " thick, and stick out 5/8". #1 Drilling AR400 Steel 10-30-2006, 02:36 PM Anyone know whether AR400 (abrasion resistent, BH 400) can be drilled easily with HSS or cobalt drills? Got some. 150” Speed 70 fpm Feed . 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. 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. , for drilling) or the workpiece (e. While narrow-diameter drill bits must maintain a minimum speed to be effective, wider bits, especially when used to bore deeper holes, must be dialed back to lessen the risk of breakage. Workpiece Material Brinell Hardness (BHN) Morse List No. If you’ve ever looked into CNC cutting tools, you’ve probably heard the term “feeds and speeds”. 350 mm 3/8 in. The formula for cutting speed (sfm) is tool diameter 5 0. pdf. Determine the spindle speed (RPM) and feed rate (IPM) for a drilling operation, as well as the cut time for a given cut length. How do you calculate speed and feed? Speed (RPM) = (Surface Feet per Minute x 3. Then go play with G-Wizard a bit. The main cylinder has a mid-trunnion mount for superior strength, balance and longevity. Cutting speeds greater than Algoma’s recommendations can cause rapid tool deterioration. I wonder what people use 30k spindles for when any speed I've come up with are less than 3000rpm. I'm using an older Hurco KMB-1 that's in. MMPM = mm per minute MMPT = mm / tooth. Questions? Contact Cleveland technical support at 888-434-8665.