Question

Items 12-15 pertain to the following data: SAE 8617 R.29 and 4.500 inches in diameter is turned using hard coated carbide in TPU322 insert (use Opt. values) 12. What is the correct rpm for this tool/workpiece combination 13. What is the correct feed-rate for this tool/workpiece combination? 14. What is the correct cutting speed for this tool/workpiece combination? 15. What is the correct cutting speed for this tool/workpiece combination? 16. 7/8 drill is used to drill a hole to have 1.5625" thread. What should be the actual hole depth? 17. A S" sine bar is to be set for an angle of 42° 19". The value for H is: 18. A 10" sine bar is to be set for an angle of 9° 11'. The value for H is: 19. The major diameter of a 12-24UNC thread is:

Answer 1

SAE-AISI 8617 (G86170) Ni-Cr-Mo Steel SAE-AISI 8617 steel is an alloy steel formulated for primary forming into wrought products. Cited properties are appropriate for the annealed condition. 8617 is the designation in both the SAE and AISI systems for this material. G86170 is the UNS number. It has a moderately low tensile strength among the SAE-AISI wrought steels in the database. The graph bars on the material properties cards below compare SAE-AISI 8617 steel to: SAE-AISI wrought steels (top), all iron alloys (middle), and the entire database (bottom A full bar means this Is the highest value in the relevant set. A half-full bar means its 50% of the highest, and so on. Pao-Yue Powder Metallurgy- www.paoyue.com.tw Specialized in Lock Parts, Aerospace Parts, Gear Parts paoyue.com.tw OPEN Mechanical Properties Brinell Hardness Elastic (Young's, Tensile) Modulus 140 190 GPa 27 x 106 psi

Cutting Speed, fpm Material Hardness, Bhn Plain Carbon Steels AISI-1019, 1020, 1030, 1040, 1050, 1060, 1070 1080, 1090 120-150 150-170 170-190 190-220 220-280 280-350 350-425 80-120 70-90 60-80 50-70 40-50 30-40 15-30 Alloy Steels AISI-1320, 2317, 2515 3120, 3316, 4012, 4020 4120, 4128, 4320. 4620 4720, 4820, 5020, 5120 6120, 6325, 6415, 8620 8720, 9315 125-175 175-225 225-275 275-325 325-375 375-425 60-80 50-70 45-60 35-55 30-40 15-30

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