CAT-SET

DRILLING | GEN3SYS® XT Pro and XT High PenetraƟon Replaceable Insert Drilling System

Technical Formulas

Formulas 1. RPM

Formulas 1. RPM

= (318.47 • m/min) / DIA

= (3.82 • SFM) / DIA

where: RPM

where: RPM

= revoluƟons per minute (rev/min)

= revoluƟons per minute (rev/min)

m/min = speed (m/min) DIA

SFM DIA

= speed (Ō/min)

= diameter of drill (mm)

= diameter of drill (inch)

A20

2. mm/min = RPM • mm/rev where: mm/min = mm per minute (mm/min) RPM

2. IPM

= RPM • IPR

where: IPM = inches per minute (in/min) RPM

= revoluƟons per minute (rev/min)

= revoluƟons per minute (rev/min)

mm/rev = feed rate (mm/rev)

IPR

= feed rate (in/rev) = RPM • 0.262 • DIA

3. m/min

= RPM • 0.003 • DIA

3. SFM

where: m/min = speed (m/min) RPM

where: SFM

= speed (Ō/min)

= revoluƟons per minute (rev/min)

RPM

= revoluƟons per minute (rev/min)

DIA

= diameter of drill (mm)

DIA

= diameter of drill (inch) = 153,700 • IPR • DIA • K m

4. Thrust

= 154 • (mm/rev) • DIA • K m

4. Thrust

where: Thrust

where: Thrust

= axial thrust (N) mm/rev = feed rate (mm/rev) DIA = diameter of drill (mm) K m = specific cuƫng energy (kPa) 5. Tool Power = ((mm/rev) • RPM • K m • DIA

= axial thrust (lbs) = feed rate (in/rev)

IPR DIA

= diameter of drill (inch)

K m = specific cuƫng energy (lbs/in 2 ) 5. Tool Power = .6991 • IPR • RPM • K m • DIA 2 where: Tool Power = tool power (HP) IPR = feed rate (in/rev) RPM = revoluƟons per minute (rev/min) K m = specific cuƫng energy (lbs/in 2 ) DIA = diameter of drill (inch)

2 )/218604.8

where: Tool Power = tool power (HP) mm/rev = feed rate (mm/rev) RPM

= revoluƟons per minute (rev/min) = specific cuƫng energy (kPa)

K m DIA

= diameter of drill (mm)

Material Constants

Material Constants

K m (kPa)

K m (lbs/in 2 )

Type of Material

Hardness

Type of Material

Hardness

85 - 200 BHN 5.45 200 - 275 BHN 6.48 275 - 375 BHN 6.89 375 - 425 BHN 7.93 135 - 275 BHN 6.48 30 - 45 RC 7.45 100 - 200 BHN 3.45 200 - 300 BHN 7.45 2.96 80 - 100 RB 4.96 20 - 80 RB

85 - 200 BHN 0.79 200 - 275 BHN 0.94 275 - 375 BHN 1.00 375 - 425 BHN 1.15 135 - 275 BHN 0.94 30 - 45 RC 1.08 100 - 200 BHN 0.50 200 - 300 BHN 1.08 0.43 80 - 100 RB 0.72 20 - 80 RB

Plain Carbon and Alloy Steel

Plain Carbon and Alloy Steel

Stainless Steels

Stainless Steels

Cast Iron

Cast Iron

Copper Alloy

Copper Alloy

Aluminum Alloy

Aluminum Alloy

-

1.52

-

0.22

Magnesium Alloy

Magnesium Alloy

-

1.10

-

0.16

High-Temperature Alloys

High-Temperature Alloys

-

9.93

-

1.44

Titanium Alloy

Titanium Alloy

-

4.96

-

0.72

The table and equaƟons on this page are found in the “Machinery’s Handbook.” Permission to simplify and print the equaƟons is granted by the Editor of the “Machinery’s Handbook.”

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