Start with conservative speeds and feeds while analyizing the rigidity of the process. Then cautiously progress incrementally to achieve optimum performance.
Center Drills | Speeds and Feeds | Resources | Carbide Plus
Drill Diameter: Workpiece Material Group: ISO: Hardness: SFM: IPR : 1/32: 1/16: 1/8: ¼: 3/8: ½: Free Machining & Low Carbon Steels 1006, 1008, 1015, 1018, 1020 ...
Adjust the cutting speed and/or feed rate based on your cutting conditions. NOTE: All speed conditions are for stable conditions. For unstable conditions, it is suggested to reduce starting speeds by 10%. For interrupted cuts, reduce by 20%. For 4 X D, it is highly recommended to start with feed and speed values reduced by 10% less than above data.
SPEEDS and FEEDS are suggested starting points only and may be increased or decreased depending on actual material and machining conditions. Start conservatively and increase speed and feed until drilling cycle is optimized.
Speed and Feed Recommendations NOTE: The speeds and feeds shown are suggested starting points only and may be increased or decreased depending on actual material and machining conditions. Start conservatively and increase speed and feed until drilling cycle is optimized. WORKPIECE MATERIAL BRINELL HARDNESS BHN SURFACE SPEED SFM FEED PER ...
Speeds & feeds are starting recommendations only. Factors such as machine, fixture and tooling rigidity, horsepower available, coolant application and others will affect the performance significantly.
FEED PER REVOLUTION BY DRILL DIAMETER (IPR)
1) Select your material in the ISO colored chart with respect to material description. 2) Start with a middle/average value for cutting speed, V c (ft/min) and feed, f n (in/rev). Adjust the cutting speed and/or feed based on your cutting conditions. Material Recommended Cutting Values Group Material Description HB HRC SFM (ft/min) Drill ...
Carbon steel drills may be started with a peripheral speed of 30 feet per minute in soft tool steel. For cast iron they may be started at 35 to 50 feet per minute, and for brass from 60 to 120 feet per minute. The starting "feed" should vary per rotation of drills according to size.
SPEEDS and FEEDS are suggested starting points only and may be increased or decreased depending on actual material and machining conditions. Start conservatively and increase speed and feed until drilling cycle is optimized.
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