RT 100 T ALU
Solid carbide spiral-flute
deep hole drills for
wet machining of aluminiumwith Si content 3% and moreiontidE
1302EMO

Made by Guhring

RT 100 T ALU –Technic and advantages
Guhring has developed the spiralflute deep hole drill RT 100 T ALU
especially for the production of deepholes in aluminium materials. The drill
is available as a special tool withimmediate effect.
In addition to the correct choice of
carbide suitable for the machining ofaluminium. Guhring has paid special
attention to the cutting edge geometryand the flute form when developing theRT 100 T ALU. They offer the following
special features:

Optimised cutting edge geometry forthe machining of aluminium
The cutting edge geometry of the
spiral-flute deep hole drill RT 100 T
ALU is optimised to produce chips thatcan be evacuated from deep holes as
easily as possible.

Spiral flutes with 15° rake angle
and improved surface quality

The flute design with a rake angle of
15° ensures a considerably shorter chiptravel. In addition. the high surface
quality of the flute offers the chips lowfriction resistance. The RT 100 T ALU
evacuates the optimally formed chips
efficiently from deep holes without
problem.

Application example cylinderhead
A typical field of application foraluminium materials is the automotive
industry and especially engine
manufacture. When machining acylinderhead the spiral-flute deephole drill RT 100 T ALU‘s level ofperformance is impressive:•drilling the main oil gallery•Ø 6.95 mm. drilling depth 2 x 210mm•drilling from both sides•
vc = 110 m/min.
•Vf = 1500 mm/min.
•p = 50 bar (soluble oil)•tool life: 500 m

The special design of cutting edge geometry...

... provides optimally formed chips...

The procedure for machining
aluminium
To achieve optimal machining resultsin the production of deep holes with
the RT 100 T Alu particularly whenpiloting on radii and/or unevensurface, we recommend the following
machining steps:
1. Milling of flat, i. e. with Guhring
Ratio end mill RF 100 U incl. centre
cutting. The flat must be at rightangles to the entry of the drilling
operation.
2. Producing a cylindrical pilot hole(tolerance F9) with a minimumdrilling depth of 1xD (up to 3xD). We
recommend our Ratio drill RT 100 U.
Thanks to its point angle of 140° andits Ø-tolerance m7 it is ideally suitedfor this machining step.
3. Entering the spiral-flute deep hole
drill RT 100 T Alu in the pilot holewith a speed of appr. 300 rev./minand a feed rate of appr. 500 mm/min.
4. Setting the cooling lubricant
pressure and speed.
5. Due to the relatively high cutting
speeds we recommend, especiallyfor the machining of aluminium, toincrease the cutting speed in several
steps to the end value, i.e. with theprogram specification fLin, until
reaching a drilling depth of 5xD.
6. Continuous drilling to full drilling
depth without pecking cycle.
7. For through holes with oblique exit
reduce the feed rate vf appr. 1 mm
prior to break-through by 40% .
8. Upon reaching the drilling depth
switch off speed and cooling lubricant,withdraw with rapid feed rate.

... and quick chip evacuation.

All deep hole drills must be guided
during pilot drilling. Deep hole drills
must never operate at full speedunsupported.

2

RT 100 T

RT 100 T ALU –special tools for the wet machining of aluminium
RT 100 T ❏ Inquiry
Guhring oHG
P.O. Box 10 02 47 . D-72423 Albstadt
Herderstr.
50-54 . D-72458 Albstadt		

❏ Order by fax: +49 74 31 17-21 279

Customer number

New cust.

RFQ/P.O. Number

Telephone: +49 74 31 17-0
Fax:		
+49 74 31 17-21 279
www.guehring.de		Company		Contact

Contact
name		Street		Postcode		Telephone		Fax		Date		Signature❏ repeat order: ______________________❏ first order❏ to attached drawing
Attention: pilot hole required!

Ø nom. 3.0 up to 14.0 mm
max. drilling depth 30 x D, max. length 370 mm

d2d1

15°

l3l2l1Tool

Please enter data or dimensions. Required for either tool or workpiece.
Ø nom. d1 (mm) h7

3.0…14.0 mm

Total length l1 (mm)max. 370 mm

Flute length l2 (mm)Shank length l3 (mm)Ø shank d2 (mm) h6

Workpiece

Clamping (HA shank recommended)
Aluminium with 3% Si content
Description
Tolerance on Ø
Drilling depth
Surface finishMachine

Conv. machine tools / deep hole drilling machines
Vertical / horizontal
Soluble oil / neat oil
Pressure in bar (min. 40 bar)
Pilot hole

RT 100 T

3Gühring KG

Made by Guhring

148 814/1365-VII-15 • Printed in Germany • 2013

P.O.Box 10 02 47 . D-72423 Albstadt
Herderstr. 50 - 54 . D-72458 Albstadt
Telephone: +49743117-0 · www.guehring.de