009 feed/rev, I cant get any faster though as this gets to my max spindle speed. I use the same insert for 1045 and can get about 10 Cu inch/min MRR at about 945SFM. or maybe someone knows a good insert for 35-40HRC? but it seems pretty slow compared to the 1130 FPM that the insert says for low alloy steel. I read it is normal to reduce the speeds significantly when cutting harder steels. The lathe is a Colchester Clausing mastiff 1400 that I converted to a CNC Lathe with a 12.5HP spindle. insert angle to workpiece is about 87 deg. it takes me about 80 min to cut the feature. I have a few parts I make that use this material but as an example 233RPM 24 inch long 3.5 inch diameter turned down to 2.5" 29 inch OAL with a 1.5" hole in the center. I burn out the insert every 200 or so cu inches.
I get decent life from the insert but even that seem a little bit low. 012" / rev and have good chips but I can seem to move the speed up without greying out the chips. It is a strong material with high fatigue resistance, impact strength, creep resistance, and wear resistance, and it can withstand high machining stress. but the MRR is terrible at 1.43 cu inch per minute. It is good to increase the speed of the lathe to improve the machining effect by setting the feed amount to a small value The material of PEEK450CA30 is. Excellent mechanical properties PEEK is superior to other thermoplastics in terms of mechanical properties. I am getting good chip breakage and a good finish. I am using Sandvik Coromant - CCMT32.52 PM Grade 4325, I am running it at 130SFM with at. I posted something similar on another forum but am unsure it has been noticed by people expert in the field. So I would like to tap some of the knowledge around here. not the fault of the manufacturers just my interpretation of the information. I don't like it and am not going to use it. So this is really not any kind of standard formula.
514 is a material multiplier, and the other is just a number that satisfies the desired feed rate or spindle speed when multiplied by the material multiplier. When I use the recommended specs I get bad results. Found out this feed rate formula is a technique used to adapt programs to multiple materials. I have been doing research on the subject but I am not really connecting the manufacturers specs on inserts to my material. it cuts like 4140 QT but is a little harder. Specifically my material is drill stem used in deep hole oil drilling, to the best of my knowledge it is 4140 with a hardness of about 40HRC. CIRCULAR SAW: BAND SAW: MACHINING GUIDELINES FOR PEEK PRODUCTS FACE MILLING SPEED (IN/MIN.) FEED (IN/TOOTH) 500 TO 700. I have been turing a part for a little while and am dissapointed in my MRR, I see companies like Titan CNC that are doing fantastic MRRs and feel Like I should be doing better.
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