Milling Cutter Corner Rounding Milling Cutters, Radius Cutters ID 1004-

Part Number: 1004-

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Milling Cutter Corner Rounding Milling Cutters, Radius Cutters

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Milling Cutter Corner Rounding Milling Cutters, Radius Cutters ID 1004-

Corner rounding milling cutters (radius cutters) are designed for radius million on arbor type milling machines.
They may be used individually or in pairs. These cutters have side and radial clearance and
can be sharpened by grinding the face without changing their forms. When ordering,
specify whether right hand or left hand cutters are wanted.

Catalog EDI-Number	Radius	Dia.	Width	Hole Size
12401-C303R 12402-C303L 12403-C304R 12404-C304L 12405-C306R 12406-C306L	1/8 1/8 1/8 1/8 3/16 3/16	2 2 2 1/2 2 1/2 2 1/2 2 1/2	1/4 1/4 1/4 1/4 5/16 5/16	7/8 7/8 1 1 1 1
12407-C307R 12408-C307L 12409-C308R 12410-C308L 12411-C310R 12412-C310L	1/4 1/4 1/4 1/4 5/16 5/16	2 1/4 2 1/4 3 3 3 3	13/32 13/32 13/32 13/32 7/16 7/16	7/8 7/8 1 1 1 1
12413-C311R 12414-C311L 12415-C312R 12416-C312L 12417-C313R 12418-C313L	3/8 3/8 3/8 3/8 7/16 7/16	3 3 3 3/4 3 3/4 3 1/4 3 1/4	9/16 9/16 9/16 9/16 5/8 5/8	1 1 1 1/4 1 1/4 1 1
12419-C317R 12420-C317L 12421-C318R 12422-C318L 12423-C320R 12424-C320L	1/2 1/2 1/2 1/2 9/16 9/16	3 1/4 3 1/4 4 1/4 4 1/4 4 1/4 4 1/4	3/4 3/4 3/4 3/4 13/16 13/16	1 1 1 1/4 1 1/4 1 1/4 1 1/4
12425-C327R 12426-C327L 12427-C328R 12428-C328L 12429-C332R 12430-C332L	5/8 5/8 5/8 5/8 3/4 3/4	3 1/2 3 1/2 4 1/4 4 1/4 4 1/4 4 1/4	15/16 15/16 15/16 15/16 1 1/8 1 1/8	1 1 1 1/4 1 1/4 1 1/4 1 1/4
12431-C336R 12432-C336L 12433-C340R 12434-C340L	7/8 7/8 1 1	4 1/2 4 1/2 4 1/2 4 1/2	1 5/16 1 5/16 1 9/16 1 9/16	1 1/4 1 1/4 1 1/4 1 1/4

SPEEDS & FEEDS

FEEDS & SPEEDS FOR MILLING CUTTERS

The proper selection of feeds and speeds is the most important factor in the economical application of any cutting tool.

Speed is generally known as the rate of peripheral speed in terms of surface feet per minute (SFM). SFM is usually converted to revolutions per minute as shown in formula Table 1

Feed is generally shown as feed in inches per revolution or as feed per tooth in inches (FPT).

The initial choice of feeds or speeds will be at the lower of high values of the ranges listed depending upon the following variables.

FEED
Use lower feed range for: Saws, End Mills, and Form Cutters Fine tooth cutters Frail and small cutters Light and finishing cuts Deep slots Hard to machine materials Frail set-ups	Use higher feed range for: Face and Slab milling Coarse tooth cutters Rugged cutters Heavy roughing cuts Abrasive materials East to machine materials Rigid set-ups

SPEED
Use lower feed range for: Heavy cuts Hard materials Tough materials Abrasive materials Maximum cutter life Minimum tool wear	Use higher feed range for: Light cuts Softer materials Non-metallics Frail work piece or set-up Maximum production rates Better finishes Hand feed operations Higher rakes (HSS cutters)

FEED, SPEED, AND HORSEPOWER CALCULATIONS

Modern milling cutters capable of operation at higher feeds and speeds, and removing more cubic inches of metal per minute, require greater machine rigidity and more power. Therefore it is important to ascertain that sufficient power is available to handle the desired depth and width of cut at the higher feeds and speeds.

The following formulas are suggested for the calculation on feeds and speeds plus horsepower requirements.

T = Number of teeth in cutter
D = Cutter Diameter in inches
RPM = Revolutions pet minute
SFM = Surface feet per minute
F = Feed in inches per minute

f = Feed per tooth in inches
W = Width of cut
d = Depth of cut
HP = Motor Horsepower
C = Machinability constant*

*Machinability constant values for various materials are based on removing one cubic inch of metal per minute per horsepower with 60% power efficiency at the spindle nose and a 25% allowance for cutter dulling.

Aluming, Magnesium, Dural
Brass
Soft Bronze, Copper
Cast Iron
Steel up to 150 Brinell, Malleable Iron
Steel, 300 Brinell, Hard Bronze
Steel, 400 Brinell

4.0 plus
2.5
2.0
1.5
.75
.6
.5

TABLE 1

.	SPEED		FEED
TYPE OF MATERIAL	HSS	CARBIDE	HSS	CARBIDE
Aluminum, Magnesium Brass & Bronze - Soft Brass & Bronze - Hard Copper Cast Iron - Soft Cast Iron - Hard	600 & Up 250 - 300 150 - 200 150 - 200 75 - 100 50 - 75	1000 & Up 1000 & Up 400 1000 & Up 250 - 350 200 - 250	.005-.025 .005-.020 .003-.010 .005-.015 .005-.015 .003-.008	.005-.030 .010-.020 .005-.010 .005-.015 .010-.022 .005-.010
Steel
100 Brinell 200 Brinell 300 Brinell	125 - 175 70 - 90 40 - 50	450 - 600 350 - 450 200 - 250	.004-.010 .004-.010 .003-.005	.005-.020 .005-.010 .005-.010
Stainless Steel
Hard Others	35 - 70 70 - 105	250 - 400 250 - 400	.003-.005 .003-.005	.003-.012 .003-.012
Titanium
Under 100,000 PSI 100,000 to 135,000 PSI 1,350 PSI & Over	35 - 55 25 - 35 15 - 25	150 - 180 120 - 150 80 - 120	.003-.005 .002-.005 .001-.005	.004-.008 .003-.008 .002-.008
High Temperature Alloys
Ferritic Low Alloys Austenitic Alloys Nickel Base Alloys Cobalt Base Alloys	40 - 60 20 - 30 5 - 20 5 - 10	150 - 300 100 - 235 50 - 150 50 - 100	.002-.005 .001-.004 .001-.003 .001-.003	.003-.008 .002-.006 .002-.006 .002-.006
High Temperature Alloys
180,000 - 220,000 PSI 220,000 - 260,000 PSI 260,000 - 300,000 PSI	25 - 40 10 - 25 6 - 10	120 - 150 80 - 120 50 - 100	.002-.005 .001-.005 .001-.003	.003-.008 .002-.008 .002-.006

The selction of initial feed within each range will vary with the type of operation. The following is an example of the starting feed for HSS Cutters in mild steel.

Type of Cut	Starting Feed per Tooth
Face Milling Straddle Milling Channel or Slot Milling Slab Milling Sawing	.008 .008 .008 .007 .002

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Milling Cutter Corner Rounding Milling Cutters, Radius Cutters ID 1004-

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