Tungsten Carbide Burrs
TC Burrs for Tough Applications
The 3R and 3RS cuts represent a new PFERD
■Their extremely high impact resistance
product line designed especially for tough
means that they are perfectly suited for use
operating conditions in dockyards, foundries
as long shank variants. Available as special
and on steel constructions.
products with 150 or 200 mm shaft length.
■Developed specifically for applications
Advantages
involving high impact loads, the new 3R and
3RS cuts are the latest addition to the exist-
■Innovative, special cuts providing excep-
ing PFERD range.
tional impact resistance.
■These extremely robust, high-performance
Application examples
cut patterns minimise tooth chipping/break-
age, splintering and burr head failures.
■High-impact applications due to long shank
■The 3R and 3RS cuts can be used on materi-
design.
als up to 55 HRC.
■Heavy-duty applications, due to angled
■These products can also be used at low
working.
speeds.
■High angle of surface contact.
■Milling of narrow contours.
Cut 3R
Cut 3RS
■Coarse, aggressive machining,
■Coarse machining,
with high stock removal.
with smooth milling performance.
Recommended rotational speed range
To determine the recommended cutting speed
➌ Select the cut.
➎ Select the required burr diameter.
[m/min], please proceed as follows:
➍ Establish the cutting speed range.
➏ The cutting speed range and the burr
➊ Select the material group that is to be
diameter determine the recommended
machined.
To determine the recommended rotational
rotational speed range [RPM].
➋ Determine the type of application.
speed [RPM], please proceed as follows:
➊ Material groups
➋ Application
➌ Cut
➍ Cutting speed
Non-hardened,
Construction steels, carbon
3R
non-heat treated
steels, tool steels, non-alloyed
steels up to
250 - 600 m/min
steels, case-hardened steels,
1200 N/mm²
Coarse machining =
3RS
Steel,
(< 38 HRC)
cast steels
high stock removal
cast steel
Hardened, heat-
with impact load
3R
treated steels
Tool steels, tempering steels,
exceeding
250 - 350 m/min
alloyed steels, cast steels
1200 N/mm²
3RS
(> 38 HRC)
Nickel based alloys, cobalt
Coarse machining =
3R
Non-ferrous
High-temperature
based alloys (aircraft engine and
high stock removal
250 - 450 m/min
metals
resistant materials
turbine construction)
with impact load
3RS
Cast iron with flake graphite
3R
EN-GJL (GG), with nodular
Coarse machining =
Grey cast iron,
graphite cast iron EN-GJS
Cast iron
high stock removal
250 - 600 m/min
white cast iron
(GGG), white annealed cast iron
with impact load
EN-GJMW (GTW), black cast
3RS
iron EN-GJMB (GTS)
Example
➏ Cutting speed [m/min]
Tungsten carbide burr, cut 3R,
250
350
450
600
Diameter 12 mm.
➎
Coarse machining of non-hardened, non-heat
Dia. [mm]
RPM
treated steels.
8
10.000
14.000
18.000
24.000
Cutting speed: 250 - 600 m/min
10
8.000
11.000
14.000
19.000
Rotational speed: 7.000 - 16.000 RPM
12
7.000
9.000
12.000
16.000
16
5.000
7.000
9.000
12.000
30
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