SGS-Speeds-Feeds-7

Product catalog summary

Overview: This document provides speed and feed recommendations for end mills, specifically for Series 7 and 7B, across various materials including carbon steels, alloy steels, tool steels, cast irons, stainless steels, super alloys, and titanium alloys. The recommendations are based on material hardness and are presented in terms of surface feet per minute (SFM), revolutions per minute (RPM), feed per tooth (Fz), and inches per minute (IPM).

Specifications:

Carbon Steels: For materials like 1018, 1040, and 1090 with hardness ≤ 275 Brinell, recommended RPM ranges from 14669 for 1/8 inch diameter to 1834 for 1 inch diameter. Feed rates (IPM) vary from 23.5 to 25.7.
Alloy Steels: For steels like 4140 and 5150 with hardness ≤ 375 Brinell, RPM ranges from 8404 to 1051, with feed rates from 10.1 to 10.9 IPM.
Tool Steels: For steels such as A2 and D2 with hardness ≤ 375 Brinell, RPM ranges from 7029 to 879, with feed rates from 5.6 to 7.7 IPM.
Cast Irons: Low and medium alloy cast irons with hardness ≤ 220 Brinell have RPM from 18489 to 2311, with feed rates from 44.4 to 47.1 IPM. High alloy cast irons with hardness > 220 and ≤ 260 have RPM from 14210 to 1776, with feed rates from 22.7 to 27.7 IPM.
Stainless Steels: Free machining types like 303 and 416 with hardness ≤ 275 Brinell have RPM from 12835 to 1604, with feed rates from 20.5 to 22.5 IPM. Difficult types like 304 and 316 have RPM from 8862 to 1108, with feed rates from 10.6 to 11.5 IPM.
Super Alloys: Nickel, cobalt, and iron-based alloys like Inconel 601 and Monel 400 with hardness ≤ 300 have RPM from 2445 to 306, with feed rates from 2.9 to 3.2 IPM. More difficult alloys like Inconel 718 have RPM from 1986 to 248, with feed rates from 1.6 to 1.9 IPM.
Titanium Alloys: Pure titanium and Ti6Al4V with hardness ≤ 350 have RPM from 9168 to 1146, with feed rates from 14.7 to 17.9 IPM. More difficult alloys like Ti10Al2Fe3Al have RPM from 3209 to 401, with feed rates from 5.1 to 6.3 IPM.

Procedures and Recommendations:

RPM is calculated using the formula: RPM = SFM x 3.82 / D1.
IPM is calculated as: IPM = (inch / flute) x 4 x RPM.
It is recommended to reduce speed and feed for materials harder than those listed.
For complete technical information, refer to the SGS Tool Wizard at www.sgstool.com.

Catalog excerpts

Speed & Feed Recommendations Hardness BRINELL rpm = sfm x 3.82 / Di ipm = (inch / flute) x 4 x rpm reduce speed and feed for materials harder than listed refer to the SGS Tool Wizard for complete technical information (www.sgstool.com)

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