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powerful for the Energy technology
Taps for ISO metric threads, M16 - M39
Guhring no.

778

Standard

DIN 2184-1

Standard

DIN 376

Tool material

HSS-E

Surface finish

CTypeH

Form

C

d1

d2

SW

l2

dk

l1
d1

M16
M20
M24
M27
M30
M33
M36
M39

P

d2mm

mm

2.00
2.50
3.00
3.00
3.50
3.50
4.00
4.00

12.00016.00018.00020.00022.00025.00028.00032.000

SW

9.00
12.00
14.50
16.00
18.00
20.00
22.00
24.00

Diameter tolerance

6HX

Cutting direction

right-handDiscount group

103dk

l1

l2mm

mm

mm

14.00017.50021.00024.00026.50029.50032.00035.000110.00140.00160.00160.00180.00180.00200.00200.00

20.00
25.00
30.00
30.00
35.00
35.00
40.00
40.00

large threads to DIN Standard
For the production of large threads from M16 to M39 we have a tap to DIN 376,
Guhring no. 778, in the range. Its geometry is not only adapted to meet the special
demands for the production of large threads, it is also suitable for the machining ofmaterials typically applied in energy technology. This tap can be used for a variety ofapplications in high-tensile steels, aluminium and AlSi-alloys up to a 6% Si-content
as well as in cast iron. Last but not least it can be applied for machining throughholes as well as blind holes. A genuine all-rounder for demanding applications!

selected machining results
Guhring no.

778

Workpiece

Gear ring

Material

42CrMo4

Thread44xM36

Thread depth

60 mm

Thread type

Blind holes

Machine type

Machining centre
compensation chuck

Lubricantsoluble oil 8%

Cutting rates

15 m/minTool life

300 threads

M16 M39

Price per tool in €llllllll

powerful for the Energy technology
Taps for ISO metric threads, M16 - M39
Guhring no.

779

Standard~DIN 2184-1

Standard~DIN 376

Tool material

HSS-E

Surface finish

CType

H

Form

C

d1

d2

SW

l2

dk

l1
d1

M16
M20
M24
M27
M30
M33
M36
M39

P

d2mm

mm

2.00
2.50
3.00
3.00
3.50
3.50
4.00
4.00

12.00016.00018.00020.00022.00025.00028.00032.000

SW

9.00
12.00
14.50
16.00
18.00
20.00
22.00
24.00

Diameter tolerance

6HX

Cutting direction

right-handDiscount group

103

dk

l1

l2mmmmmm

14.00017.50021.00024.00026.50029.50032.00035.000160.00180.00200.00225.00250.00275.00300.00325.00

25.00
30.00
36.00
36.00
42.00
42.00
48.00
48.00

Large threads with long reach
For the production of large threads in deep holes we have a tap, Guhring no. 779,
in the range. For this task it possesses a longer thread length and an elongatedneck, providing it with more reach. It is also suitable for the machining of materials
typically applied in energy technology such as high-tensile steels, aluminium andAlSi-alloys up to 6% Si-content as well as cast iron - and of course also for throughas well as blind holes.

selected machining results
Guhring no.

779

Workpiece

Spur gear

Material

17 CrNiMo 6 (ca. 58 HRC)

Thread12xM36

Thread depth

36 mm

Thread type

Blind hole

Machine type

Machining centre
quick-change chuck

LubricantSoluble oil 8%

Cutting rates

8 m/minTool life

240 thread

M16 M39

Price per tool in €llllllll

powerful for the Energy technology
Fluteless taps for ISO metric threads, M16 - M39

d1dkl2
l1d1M16M20
M24M27
M30
M33M36
M39923Standard

DIN 2184-1

Standard~DIN 376

Tool material

HSS-E

Surface finish

STypeN

FormC

P

d2

SW

Guhrinh no.

P

d2

mm

mm

2.00
2.50
3.00
3.00
3.50
3.50
4.00
4.00

12.00016.00018.00020.00022.00025.00028.00032.000

SW

9.00
12.00
14.50
16.00
18.00
20.00
22.00
24.00

Diameter tolerance

6HX

Cutting direction

right-handDiscount group

103

dk

l1

l2mm

mm

mm

15.10018.90022.70025.70028.50031.50034.30037.300110.00140.00160.00160.00180.00180.00200.00200.0020.0025.00
30.00
30.00
35.00
35.00
40.00
40.00

large threads perfectly formed
Benefit from the advantages of formed large threads with our fluteless tap, Guhring
no. 923. Above all you profit from the high process reliability with large, expensive
components! Because cross-cutting of the thread is out of the question, the same
applies to thread pitch and flank angle errors. In addition, formed threads possess
an exceptionally high tensile strength in the load bearing thread flanks. The universal
application of this fluteless tap in through and blind holes as well as in a wide rangeof materials round off the advantages.

selected machining results
Guhring no.

923

Workpiece

Round frame

Material

42CrMo4Thread

200xM30 (x3.5)

Thread depth

60 mm

Thread type

Blind hole

Machine type

Machining centre

LubricantNeat oil

Cutting rates

18 m/minTool life

1050 threads

M16 M39

Price per tool in €llllllll

powerful for the Energy technology
Industrial sectors such as transmission, turbine and energy plant manufacturers require exceptionally large threads. For exactly suchapplications we have the taps, Guhring nos. 778 and 779 as well as the fluteless tap, Guhring no. 923 in the range for thread sizes M16to M39.
As part of our special solutions we also provide taps and fluteless taps within the scope of our semi-standard range with short delivery
times and at a favourable cost. Based on our ex-stock blanks of our standard range we manufacture taps up to a length of 400 mm for thethread sizes M16 to M39 to customer specifications with application oriented coatings for your special application task.

PerfeCt Partners: large taps and the HT 800 WPdrilling system
The HT 800 WP interchangeable insert drilling system is the ideal
solution for the production of large holes. Six holders for drilling depths
up to 10xD and five interchangeable inserts with special geometries andcoatings for various materials ensure the production of accurate holes inthe diameter range from 11.00 to 40.00 mm.

Special thread milling cuttersThread milling cutters are also ideal tools for the production of large
threads. As part of our special tool production we produce thread milling
cutters according to your requirements up to a cutting edge diameterof 32 mm and a thread pitch of 6 mm with variable thread length andapplication oriented coating.
The advantages of thread milling are obvious: With a thread milling cutter
one can produce different diameter (or tolerances) threads with the same
pitch. In addition, the same tool can produce right- and left-hand threads.
As thread milling only produces very short chips, their evacuation does
not cause any problems.
The package of advantages is rounded off thanks to the universal
application of thread milling cutters in different materials and the highprocess reliability.

special
solutionstapping/thread milling/thread forming

countersinking

milling

Modular Systems

reaming

PcD

services

146 988/1256-III-15 • Printed in Germany • 2012drilling

Gühring oHG
Post-box 100247 • 72423 Albstadt
Herderstraße 50-54 • 72458 Albstadt
Tel. (0 74 31) 17-0
Fax (0 74 31) 17-21279
info@guehring.de
www.guehring.de

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