HR 500 GUSS
The specialist for optimal surface
quality in GG and GGG
NEW! Gor GG
Also fMade by GuhringHR 500 CAST – standard tools for GG

Proven standard – HR 500 CAST for GG
Standard range HR 500 CAST high-performance reamers offer
completely new possibilities for highly efficient reaming of grey
cast iron with solid carbide:• optimal surface quality below Ra 1.6• maximum cutting speeds from 200 to 300 m/min• high feed rates up to 0.25 mm per cutting edge
• maximum tool life
• no built-up edges• no premature cylindrical land wear
• favourable tooling and production costs

Practical example of optimal surface quality –GG 30 petrol engine
Demanding a surface quality of Rz 10 is a high hurdle
to overcome in GG 30. An 8-fluted HR 500 CAST
high-performance reamer is applied for machining tappet
bores Ø 20.2 H7 with a feed rate of 6300 mm/min.
The tool life exceeds 80 m.

A surface quality of Ra 0.8 is no problem with the new HR 500 CAST. Prerequisite, however, is a minimum average castquality with homogenous structure and an even distribution of casting cavities.
P-geometry alignment Lc/Ls = OFFP-geometry alignment Lc/Ls = OFF

2.0

2.0

0.0

0.0(µm)-2.0(µm)-2.0
Probe TKU300 Lt = 4.80 mm Vt = 0.50 mm/s Lr = 0.800 mm

Probe TKU300 Lt = 4.80 mm Vt = 0.50 mm/s Lr = 0.800 mm

Cluster of large cavitiesl-----l
100 µmmagnification = 100 x
high voltage = 15.00 kV
working distance = 15 mm 		detektor = SE1

Guhring F&E

Homogenous cast structure with even distribution of castingcavities. HR 500 CAST continues to achieve a surface qualityof Ra 0.46 after a tool life of approximately 60 m.

2HR 500l-----l
100 µmmagnification = 100 x
high voltage = 15.00 kV
working distance = 16 mm 		detektor = SE1

Guhring F&E

Extreme cavity size and distribution:
With this structure a compromise on surface quality must
be taken into consideration.

HR 500 Cast – as special tool for GGG

NEW! Gor GG
foslA

HR 500 Cast – as special tool now also for an optimal surface finish in GGG!
The new version of the HR 500 CAST reamer with Signumcoating specially for the machining of GGG offers highperformance with• surface quality: Ra < 1.2• cutting speed: vc = 120 – 220 m/min• process reliability

Practical example – GGG 40 shift fork:
The GGG version of HR 500 CAST achieves exceptional values
thanks to its optimised geometry and the high-strength
Guhring Signum-coating. The combination prevents built-up
edges and premature cylindrical land wear, typical wear factors
when machining cast materials. The new HR 500 CAST formachining GGG is, initially, exclusively available as a special
tool. When applying the dimensions according to the Guhring
HR 500 ACTIVE program we can produce the customer’s
special tool at short notice. Please contact us!

HR 500 Active
HR 500 Active – short-term production ofHR 500 high-performance reamers
With the HR 500 Active program, special solutions of theHR 500 reamer can be supplied at short notice. TheActive program guarantees the proven HR 500 technology
for cylindrical and stepped holes. The customer can arrange
a suitable HR 500 high-performance reamer to meet hisrequirements:• available as long and short version• all interim dimensions from 3 mm to 20 mm possible• usual high quality in the shortest time

Please contact us for further information.

HR 5003Gühring oHG

Made by Guhring

147 950/1360-VII-15 • Printed in Germany • 2013

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