PROCESS RELIABILITY
RATHER THAN NERVE TINGLINGBY G ÜHRING

GM 300CH ECK A N D M E ASU R I NG
I NST RU M EN TS FO R O P T I M A L TOO L CL A M PI NG
A N D lubrication

Check- and Measuring
instruments
Optimal tool clamping
and lubrication
Pre-requisite for perfect machining results is not only the right choice of machine, tool
holder, chuck and tool. Just as important is a constant check of tool clamping andlubrication. Optimal tool clamping and lubrication ensures long tool life, highest cutting
performance as well as excellent quality and prevents tool breakage, chip congestion orinferior machining quality.
As a full-range supplier of tools, tool holders and chucks for all matters
machining, Guhring has also developed a comprehensive program of
instruments for measuring and checking the tool clamping and lubricationthat are available as special solutions in the GM 300 program.
All measuring and inspection instruments are suitable for measuring
or checking the tool clamping and the coolant supply directly onsite on the machine in production. This allows a quick, simple
and accurate measurement or inspection under actual machining
conditions at any time.

Clamping force measuring
instrument HSK + ISO taper

clamping force for clamping systems

The accuracy of the HSK connection does not only dependon the geometry but also on the drawing force of the HSK
clamping system which plays an important part in ensuring
a powerful and dimensionally accurate connection.
To ensure operational safety, a regular clamping force checkof the HSK interface is recommended. An entirely mechanicalclamping force measuring instrument is now available from
Guhring. Its operation is based on components, which arelinear adjustable in length and positioned proportional to theforce. A force is associated with the alteration in length which
is displayed via an analogue dial gauge.
Specifications::- few components, therefore cost-efficient- robust design- battery or mains connection not required- patented operating principle which is also adaptable toother spindle designs

Min. required pull forces for clamping systems
taper size HSK25
taper size HSK32
taper size HSK40
taper size HSK50
taper size HSK63
taper size HSK80
taper size HSK100
taper size SK/BT30
taper size SK/BT40
taper size SK/BT50

2.8 kN5 kN
6.8 kN
11 kN
18 kN
28 kN
45 kN
6 kN
12 kN
25 kN

HSK proofing bar

dial gauge

drawbar

Clamping force measuring instrument
Product information• mechanical clamping force inspection instrument for
HSK / ISO taper / BT* clamping systems in machine tool
spindles• calibration on request
Scope of delivery• supplied in wooden case with inspection protocol,
calibrated, with measuring instructions• for ISO taper order pull studs Guhring no. 4925, 4926
separately• for BT* order shortened special pull studs separately

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From the holder to the tool, Guhring supplies measuring and inspection instruments forclamping and lubrication including minimal quantity lubrication.

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The Guhring check- and measuring instruments:
Clamping force measuring instrument HSK/SK for accurate measuring of
HSK/SK clamping systems (page 3)
SENSO 3000 for accurate measuring of the clamping force for hydraulic chucks (page 4)

HSK-A/C/E
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ISO taper/
BT*

25
32
40
50
63
80
100

30
40
50
-

SENSO-SHRINK for accurate measuring of the clamping force for shrink fit chucks (page 6)
PQ 3000 for checking of pressure and volume of coolant flow with conventional lubrication (page 8)
CC 3000 for checking of the filtering efficiency of the coolant system (page 9)
MQL-CHECK 3000 for measuring of the coolant volume and the reaction time withthe minimal quantity lubrication MQL (page 10)

2

Check and measuring instruments

d2
mm
32
44
69
19
24
30
38
48
60
75

Guhring no.

4973

4974

Discount group

114

114

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mm
216
248
285
187
192
196
203
235
250
260

Code no.

Availability

30,00040,00050,000lllCode no.

Availability

19,00024,00030,00038,00048,00060,00075,000

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Check and measuring instruments

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SENSO 3000

GUHRING REPAIR SERVICE

clamping force for hydraulic chucks
The hydraulic clamping technology is a well-known, provenand reliable method for the clamping of tools. Thanks to
its completely closed design the system is sealed andimpervious, requires extremely low maintenance andguarantees longevity. Following many years of general use,
however, thermal and mechanical influences can lead to a
reduction in clamping force. The result can be a poor tool
life and a diminished surface quality including expensive tool
breakages during machining operations.
Determining the loss of clamping force was until now
extremely costly and inaccurate. It involved either
determining the number of clamping screw rotations or thetorque with the assistance of a proofing bar and a torque keyor the expansion rate applying an accurate internal measuring
instrument.
The new Guhring SENSO 3000 measuring instrument offersa precise, quick and simple as well as consistent method of
measuring the clamping force. An added advantage is themobility of the system, i.e. for measuring within machines
and fixtures.
SENSO 3000 determines the clamping force of the hydraulicchuck via a pressure sensitive plug gauge. The entire lengthof the plug gauge is clamped in the hydraulic chuck so thatwhen tightening the clamping screw the clamping pressure of
the chuck is optimally applied. The clamping force measuring
instrument displays the clamping force as an absolutemeasurement value on the one hand and as a percentage
clamping force in relation to a reference value that can be

set individually on the other. This way, SENSO 3000 canbe adapted to customer specific application conditions andrequirements.
The clamping force measuring instrument is supplied with aplug gauge for the respective clamping diameter as well as a
carbide proofing bar for calibration purposes and a CR 2430
type battery – all in a sturdy and handy case.

Save through maintenance!
Costings prove: inspection and repair is profitable!
Insufficient clamping force of hydraulic chucks can havedisastrous consequences: poor cutting rates and tool life of
the clamped tools, reduced surface quality of the machined
workpiece and breakage of tool, holder and workpiece. Our
test measurements show: one in 10 chucks displays a loss inclamping force!
Regular hydraulic chuck clamping force inspections canprotect against such unwelcome and expensive consequences.
Therefore, we provide a new service to ensure optimum
performance of you hydraulic chucks - from any
manufacturer:

2. Our repair service
If the existing clamping force is insufficient, we check thecause of the loss in clamping force, replace the necessarycomponents, re-fill the hydraulic system and carry out a final
inspection.
3. New hydraulic chucks
If the hydraulic chuck is irreparable, we will offer you a new
hydraulic chuck from our current Guhring GM 300-program!

1. Professional clamping force inspection
The measurement is taken quickly, without exertion of force
and in the machine or equipment at your premises for yourproduction with Guhring‘s SENSO 3000 clamping force
measuring instrument.

Senso 3000
Scope of delivery• supplied respectively with measuring arbor,
carbide proofing arbor, battery and case

Guhring no.

4038

Discount group4

Net priceclamping diametermm

Code no.

Availability

6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
25.0
32.0

6,000
8,000
10,00012,00014,00016,00018,00020,00025,00032,000

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Check and measuring instruments

For further information regarding Guhring‘s hydraulicchuck repair service please contact your regional Guhring
representative.

Check and measuring instruments

5Senso-shrink 3000
clamping force for shrink fit chucks

SENSO-SHRINK 3000 offers the user thefollowing benefits:

With SENSO-SHRINK 3000 Guhring offers a clamping force measuring instrument
for shrink fit chucks. SENSO-SHRINK 3000 simply, quickly and accurately determines the clamping force of the shrink fit chuck by measuring the bore volume on
your premises. The measuring result displayed by SENSO SHRINK 3000 is the deviation percentage from the nominal value of a reference chuck. Measuring results ina range between 95 % and 105 % indicate optimal clamping of the tool.

simple, quick and accurate measuring of the shrink fit chuck clamping
force directly on your premises
early recognition of wear and incorrect handling of shrink fit chucks
considerable increase of process reliability during use
quality assurance of overall system: tool, chuck and tool holder
wireless system, providing reproduceable measuring data at any time
An optional data interface enables the documentation of measuring results
and further evaluations on a PC.

C

90 %

100 %

< 95 %:
bore wornor widened,
therefore clamping force too small

6

95 % ... 105 %:optimal clamping force

Check and measuring instruments

110 %> 105 %:
bore too small,shrink fit ability endangered, i.e. throughoverheating during shrink fitting or
deformation

Technical Data:

Measuring range:
Tool diameter range:
Power supply: 		

70 % to 130 %6, 8, 10, 12, 14, 16, 18, 20, 25, 32 mmbattery

SENSO-SHRINK 3000 consists of:• clamping force measuring instrument with proofing bar for the respective clamping diameters• data interface and PC software are optional

Check and measuring instruments

7

PQ 3000

CC 3000 filtering efficiency

Coolant pressure and volumeof the coolant system

Guhring‘s PQ 3000 enables quick and simple measuring ofpressure and volume of coolant flow directly in the machineusing the actual tool applied.

in the stationary tool spindle. This way, it is possible toestablish the real conditions of the relevant machine and tool
configuration and measure the resulting actual rate of flow.

Guhring has developed the PQ 3000 instrument for quick,simple and direct measuring of the existing coolant pressure
and rate of flow for tools with internal cooling.

PQ 3000 provides the following information:

PQ 3000 enables the measuring of pressure and rate offlow of coolant when the actual tool is clamped directly

With Guhring‘s CC 3000 you can quickly and simply checkthe filtering efficiency of the coolant system.
Guhring has developed the inspection instrument CC 3000
for quick, simple and direct check of the coolant filtering
efficiency.

• pressure and volume flow of the coolant pump, theso-called P/Q characteristic curve• possible pump or seal wear as well as rotary transmission
losses• possible narrowed cross sections in the line throughmachine, spindle and tool holder• possible blocked filters• possible narrowed cross sections resulting from deposits
on the surface of the coolant ducts in the tool
• the coolant duct layout in the tool.
to identify and rectify possible weak points in the overallsystem, this way, the tool life of the applied tool canbe optimised preventing tool breakage as well as chipcongestion and jamming!
PQ 3000 povides data of sensors and indicates themeasuring results on the display fixture. A data interface
enables an evaluation via software on your PC (interface
and software are available on request).

Thanks to replaceable stainless steel filters, the user canadapt the instrument specifically to the filtering of the coolant
system. CC 3000 establishes the present condition of theindividual system and displays the actual filter efficiency.
In order to analyse and rectify possible weak points of thefilter system, the following information is provided:• perfect operation of the coolant filtering system• defective filters• insufficient filtering for the applied tool
In addition, it is possible to determine the oil concentration of
the applied soluble oil with the included refractometer.
Thus, it is possible to optimise the tool life of the appliedtool, to prevent tool breakage and subsequent production
stoppage!

CC 3000
Product information• range of application 50 - 500 min-1• suitable for coolant pressure up to 80 bar

PQ 3000
Product information• pressure checking range: 1 to 120 bar• rate of flow checking range: 2 to 40 l/min• diameter holder shank: 16 mm• diameter range tool holder: ER 32 / 6 to 20 mm• display for existing pressure P in bar also rate of flow volume Q in l/min

Guhring no.

4068

Discount group

Net price
Code no.

case complete
interface and PC-Software

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Scope of delivery• clamping fixture and checking instrument• display fixture with grip and connection socket• checking data cable with connector plug, length 3 m•E R 32 collet holder and sealing washer set for standard shanks withcollets from 6 to 20 mm diameter• clamping key for tensioning nut

Scope of delivery• inspection instrument with HSK 63-A interface• high-grade steel filter sizes 100, 200 and 300 μm• refractometer including accessories• magnifying glass, 8-fold magnification• coolant delivery set guhring no. 4949 code 18,063• order high-grade steel filter size 60 μm separately

10,000Guhring no.
Availability

Discount grouplon request
case complete

4076

4077

Net price

Net price

Code no.

Availability

10,063lhigh-grade steel filter size 60, Guhring no. 4077
high-grade steel filter size 100, Guhring no. 4077
high-grade steel filter size 200, Guhring no. 4077
high-grade steel filter size 300, Guhring no. 4077

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Check and measuring instruments

Check and measuring instruments

Code no.

Availability

60,000100,000
200,000
300,000llll9MQL-Check 3000
coolant volume andreaction time with MQL
The development of Guhring‘s new MQL-Check 3000
allows simple and quick measuring of the coolant
volume and the reaction time with minimal quantity
lubrication (MQL) directly at the tool point. For theuser, the result is a considerable increase inprocess reliability with MQL machining.

MQL-Check 3000 consists of:measuring unit incl. sender and magnetic base for installation withhorizontal machining
BY GÜHRING

display facility with receivermeasuring filter for measuring range up to 12 ml/h, up to 30 ml/h and
up to 60 ml/h
Data interface and PC software are available as an option.

BY G ÜHRING

Especially with minimal quantity lubrication, an
optimal delivery of the minimal coolant volume
to the cutting edge is paramount. An insufficientdelivery or a delayed response time respectively
can lead to fatal results such as premature
wear, a deterioration in machining quality oreven tool breakage. In contrast, an excessive
coolant volume results in increased costs throughunnecessary coolant consumption and additional
cleaning expense for components or machines
as well as an unneccessary impact on theenvironment and personnel.
Until now, measuring the coolant volume exitingat the tool point was practically impossible. With
the MQL-Check 3000, Guhring is for the first timeoffering a simple to operate measuring instrumentfor quickly checking the coolant volume directlyat the tool point. MQL-Check 3000 is simply
installed in the machine, the tool point is passed
into the measuring opening of the measuring
unit and the coolant delivery switched on. The
measuring unit of the MQL-Check 3000 sends
the recorded data wireless to the associateddisplay equipment, on which the resulting values
are displayed in ml/h. Furthermore, the datainterface on the display facility allows the transferof the data to a PC as an option, making further
evaluations and above all the documentation of
the measurements possible.

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Check and measuring instruments

Subsequently, the user benefits from:• simple, quick measuring of the coolant volume
directly at the tool point• ascertaining the actual response time, i.e. thetime from starting the system to the coolant
exiting at the tool point• reproduceable and at any time comparable
measuring data
• a workshop suitable system, wireless operation- in terms of power supply as well as datatransfer• comparitive measuring regarding function of
MQL equipment, machine, spindle, tool holder
and tool

Technical Data

Measuring range:
Tool diameter range:
Measuring position:
Power supply:		

5 to 60 ml/h
3 to 20 mm
0 to 90° (vertical and horizontal machining)battery

Check and measuring instruments

11

Special toolingsolutionsTapping/thread milling/
fluteless tapping

Countersinking/de-burring

milling

Modular toolingsystems

reaming

PCD

Tool restoration service

115 996/1316-III-15 • Printed in Germany • 2013

Drilling

Guhring oHG
P.O. Box 100247 • 72423 Albstadt
Herderstraße 50-54 • 72458 Albstadt
Tel. +49 74 31 17-0
Fax +49 74 31 17-21279
info@guehring.de
www.guehring.de

No liability can be accepted for printing errors or technical changes of any kind.
The illustrations show optional equipment.
Our Conditions of Sale and Terms of Payment apply. Available on request.