KENNAMETAL Turning Calculator - MACHINING CALCULATOR

Kennametal Turning Calculator - MACHINING CALCULATOR

Plastic in Plastic sleeve

Kennametal Turning Calculator

How to use your new Kennemetal calculator

SETUP DATA

workpiece material: - AISI 4140 STEEL, 230 BHN

workpiece diameter:- 5 inches

workpiece length:- 4 inches

depth to cut:- .150

insert: - CNMG 432

machine:- 40 horsepower, good condition

speed:- 500sfm

feed:- .015

1. DETERMINE FEED AND SPEED:- To determine suggested speed and feed, consult the technical information section of the most recent Kennametal catalog
2. DETERMINE THE RPM:- On the front side, MACHINE RPM, find 5 to WORK DIAMETER r scale and set this mark under the arrow. Opposite 500 on the SURFACE SPEED scale, read 380 on the RPM scale. The RPM is 380.
3. DETERMINE THE METAL REMOVAL RATE:- On the front side, REMOVAL RATE, locate 500 on the URFACE SPEED scale. Under this mark, set .150 on the DEPTH OF CUT scale. Without moving the slide, locate .015 on the FEED RAYE scale and read 13.5 opposite it on the REMOVAL RATE scale. The metal removal rate is 13.5 cubic inches per minute.
4.   DETERMINE THE HORSEPOWER:- On the flip side, HORSEPOWER, locate 230 BHN on the WORK MATERIAL scale. Under it set 13.5 on the REOVAL RATE scale. Without moving the slide, fin .015 on the FEED RATE scale, and above it read 15 on the HORSEPOWER REQUIRED scale. The horsepower required is 15.
5. DETERMINE CURRING TIME:- Also on the flipside, CUTTING TIME, locate 380 on the RPM scale. Under it, set .015 on the FEED RATE scale. Without moving the slide, find 4 on the LENGTH OF CUT scale, and read .7 under it on the TIME scale. The proposed cut will require .7 minutes.