SCHUNK TENDO Zero User instructions

Assembly and Operating Manual
TENDO Zero
Hydraulic Expansion Toolholder
1General
1.1About this manual
This manual is part of the product and contains important
information for safe and correct use. It must be kept accessible
at all times. Personnel must have read and understood this
manual before starting any work. All safety notes and the
associated specifications in particular must be observed and
complied with. Illustrations may differ from the actual design.
1.2Applicable documents
– General terms of business
– Catalog data sheet of the purchased product
The other applicable documents can be downloaded from
schunk.com.
1.3Warranty
The warranty is valid for 24 months from the date of delivery
from the production facility if the product is used as intended
and in compliance with the prescribed operating data.
Wear parts and parts that come in contact with the tool or
machine are not covered by the warranty.
1.4Illustration of warnings
WARNING
Dangers for persons!
Non-observance can lead to irreversible injury and even
death.
CAUTION
Dangers for persons!
Non-observance can cause minor injuries.
NOTICE
Material damage!
Information about avoiding material damage.
1.5Scope of delivery
– Product
– Assembly and Operating Manual
1.6Accessories
The following accessories for the product are available
separately:
– Test shaft for monitoring the expansion rate
– Allen key for operating the clamping screw
– Hexalobular socket wrench for adjusting the concentricity
– Hexagon socket wrench for length adjustment
– GZB-S intermediate sleeves for clamping several different
shank diameters
– GZB-S sleeve remover for removing intermediate sleeves
2Basic safety notes
2.1Appropriate use
– The product is used to clamp rotationally symmetric tools.
– The product is intended for industrial use.
– The product is intended for installation in a machine/
automated system. The applicable guidelines for the
machine/automated system must be observed and complied
with.
– The product may only be used and operated within the scope
of the technical data and the specifications in this
manual, }Chap.3.
2.2Inappropriate use
The product is not being used as intended if:
– The information in the technical data is not observed when
using and operating the product }Chap.3.
– The maintenance and storage instructions are not
observed }Chap.5.
– The product is used with heat shrinking technology.
2.3Ambient conditions and operating conditions
The ambient and operating conditions must correspond or be
adapted to the version of the product and the specifications in
the technical data.
2.4Structural changes, spare parts
Structural changes such as modification and reworking, e.g.
additional threads, bore holes or attachments, may only be
carried out with the written approval of SCHUNK. Only use
original spare parts and spares authorized by SCHUNK.
2.5Notes on safe operation
– The product must not be clamped without a tool above 25°C.
– Never combine multiple product extensions.
– Only use SCHUNK intermediate sleeves and always insert up
to the fixed backstop point. The use of intermediate sleeves
can reduce the transmittable torque.
– Long, projecting or heavy tools may only be clamped if the
speed of rotation is reduced according to the ambient and
operating conditions on site. The level of reduction is the
responsibility of the operator and must ensure safe operation
of the product.
– Maintain and service the product on a regular basis.
– Do not remove the air bleed screw (secured with pin or
resin).
– All repair work must be performed by SCHUNK.
– The operational safety and function of the product must not
be impaired by external influences.
– Follow the country-specific applicable safety, accident
prevention, and environmental protection regulations for the
application field of the product.
– Use mechanical screwdrivers only after approval by SCHUNK.
2.6Personnel qualifications
– All operations may only be carried out by personnel that are
qualified and instructed for the respective operation.
– Personnel qualifications must comply with the on-site
country-specific requirements and laws.
2.7Personal protective equipment
– When working on and with the product, follow the
respective country-specific legal requirements for
occupational health and safety, and wear the necessary
personal protective equipment.
– Follow country-specific accident prevention regulations and
the general safety notes.
2.8Transport
To avoid product damage, the transport and handling of the
product must be adapted according to the version, weight and
packaging of the product. If necessary, use additional aids.
3Technical data
Operating temperature range [°C] 20 – 50
Test temperature for
the clamping force control [°C] 20 – 25
Max. coolant pressure [bar] 80
Max. adjustment travel of
the length-setting screw [mm] 2
Tool shank tolerance h6
Max. tightening torque of
the clamping screw [Nm] 10 – 12
Preload torque of set-screws for the concentricity
adjustment [Nm] 1
Max. tightening torque of set-screws for the
concentricity adjustment [Nm] 3
Max. correctable run-out error [µm] 10*
* for a projecting length of 2.5 x clamping diameter.
① Clamping screw ④ Clamping diameter
② Set-screws for the
concentricity adjustment ⑤ Minimum clamping depth
③ Length-setting screw ⑥ Projecting length L1
Clamping
Ø [mm]
Permissible
transmittable
torque** [Nm]
Minimum
clamping
depth [mm]
Permissible radial
force F on the
product at 50 mm
projecting length
L1 [N]
6 16 27 225
8 23 27 370
10 45 31 540
12 90 36 650
14 110 36 900
16 185 39 1410
18 240 39 1580
20 330 41 1860
25 400 47 4400
32 650 51 6500
Clamping
Ø [inch]
Permissible
transmittable
torque** [Nm]
Minimum
clamping
depth [mm]
Permissible radial
force F on the
product at 50 mm
projecting length
L1 [N]
1/4 17 27 225
3/8 45 31 540
1/2 95 36 650
5/8 185 39 1410
3/4 310 41 1860
1 400 47 4400
1 1/4 650 51 6500
** Tool shank minimum tolerance h6, oiled tool shank.
The loading limits of the spindle holder must be observed!
Max. speed of rotation*** for clamping diameter
Clamping Ø [mm] 6 8 10 12 14 16 18 20 25 32
Max. speed of rotation
[RPM]
L1 below 125 mm
L1 above 125 mm
50000
30000 25000 20000
Clamping Ø [inch] 1/4 3/8 1/2 5/8 3/4 1 1 1/4
Max. speed of rotation
[RPM]
L1 below 125 mm
L1 above 125 mm
50000
30000 25000 20000
*** depending on the interface of the spindle and tool to be
clamped.

Copyright:
This manual is protected by copyright. The author is
SCHUNK GmbH & Co. KG. All rights reserved.
Technical changes:
We reserve the right to make alterations for the purpose of
technical improvement.
Document number:1510527
Edition:02.00|03/11/2022|en
SCHUNK GmbH & Co. KG
Spann- und Greiftechnik
Bahnhofstr. 106 – 134
D-74348 Lauffen/Neckar
Tel.[phone]
Fax [phone]
[email protected]
schunk.com
1510527
3.1Permitted shank types
1. Shank type according to DIN 1835-1 form A and DIN 6535
form HA
2. Shank type according to DIN 1835-1 form B and DIN 6535
form HB (up to Ø 20 mm)
3. Shank type according to DIN 1835-1 form B and DIN 6535
form HB (from Ø 25 mm)
4. Shank type according to DIN 1835-1 form E and DIN 6535
form HE
Tool shanks with reliefs (type 2, 3 and 4) can impair the
balancing grade and concentricity of the overall system.
4Operation
4.1Basic information
WARNING
Risk of injury due to ejected parts!
The max. speed of rotation of the machine/automated
system must be reduced when using long, projecting or
heavy tools and with extensions.
WARNING
Risk of injury and material damage due to the expansion
sleeve bursting!
If not used as intended, the expansion sleeve may burst. This
can cause metal shards and oil to be ejected from the
product under high pressure, resulting in serious injury.
•Never heat the product in heat shrink devices;
only perform a tool change using the integrated
clamping screw.
•Do not exceed the specified operating temperature.
CAUTION
Risk of injury from tools with sharp edges!
Sharp edges on tools can cause cuts.
•Wear protective gloves when assembling the tool.
NOTICE
Material damage due to burrs and dirt!
•The tool must be free of burrs and dirt at the shank.
NOTICE
Material damage due to incorrect minimum clamping
depth!
Too small a clamping depth of the tool leads to a loss of
accuracy and torque on the product.
•Observe the minimum clamping depth of the tool.
NOTICE
Potential impairment of the clamping function and damage
to the product!
If the product is not used as intended, the clamping function
may be impaired or the product may get damaged.
•Only operate the clamping screw by hand.
•Do not adjust the tool length when the tool is clamped.
4.2Mounting tool
1. Unclamp the product by loosening the clamping screw.
NOTE: The clamping screw is not secured against falling
out!
2. If required, the tool length can be adjusted by screwing the
integrated length adjustment screw in or out. Observe the
adjustment travel of the length adjustment
screw }Chap.3.
3. Ensure that the set-screws for adjusting the concentricity
do not protrude into the clamping bore and thus obstruct
the joining of the tool.
4. Insert the tool to the minimum clamping depth or stop.
5. Screw the clamping screw in by hand until it reaches the
stop. Observe the maximum specified tightening
torque }Chap.3.
4.3Assembling the product
1. Position the product with tool correctly in the machine
interface and tighten.
NOTE: Observe the machine manufacturer's specifications!
2. Check that the product is in the correct position and
securely clamped in the machine.
IMPORTANT!Safe clamping of the product in the machine
must be ensured!
4.4Adjusting concentricity
Use a suitable measuring device with a resolution of 0.001
mm to adjust the concentricity. NOTE: When using an
intermediate sleeve, the concentricity cannot be adjusted.
1. Mount the tool }Chap.4.2.
2. Mount the product }Chap.4.3. NOTE: The concentricity is
ineffective if the product is not mounted in the machine
during this process.
3. Slightly screw in all set-screws for the concentricity
adjustment. Observe the specified preload
torque }Chap.3.
4. Check the concentricity.
5. Screw in set-screw(s) on the opposite side of the highest
deflection to correct the run-out error. Observe the
specifications for the max. tightening torque of the set-
screws for the concentricity adjustment }Chap.3.
NOTE: Do not change the remaining set-screws in the
process.
6. Check the concentricity and correct again if necessary
4.5Tool change
1. Unclamp the product by loosening the clamping screw.
NOTE: The clamping screw is not secured against falling
out!
2. Loosen all set-screws for the concentricity adjustment.
3. Remove tool.
4. Mount new tool }Chap.4.2.
5Maintenance and storage
If you have any questions regarding maintenance, our technical
after-sales service is available during our business hours:
Service telephone: [phone]
[e-mail]
All repair work may only be performed by SCHUNK!
5.1Cleaning the clamping bore
Clean the clamping bore during every tool change with a
cleaning agent containing solvents and a cleaning brush.
5.2Checking the clamping force
Check the clamping force before initial use, after approx. 100
tool changes and at least every 3 months.
1. Unclamp the product by loosening the clamping screw.
NOTE: The clamping screw is not secured against falling
out!
2. Insert the test shaft to the minimum clamping depth.
3. Screw the clamping screw in by hand until it reaches the
stop. Observe the maximum specified tightening
torque }Chap.3.
4. The clamping force is no longer sufficient if the test shaft
can be pulled out of the product with little effort using two
fingers.
In this case, send the product to SCHUNK for inspection.
5.3Lubricating the clamping screw
CAUTION
Allergic reactions if lubricating grease comes into contact
with the skin.
•Wear protective gloves to lubricate the clamping screw.
It is necessary to adapt the cleaning and lubrication of the
clamping screw to the ambient conditions. Especially in the
case of high clamping frequencies, high operating
temperatures, and abrasive dirt or dust. For optimum
lubrication of the clamping screw, we recommend copper
paste MOLYKOTE CU 7439. (100 g tube, ID 9247204).
1. Unscrew the clamping screw from the product.
IMPORTANT!The actuating piston underneath is not
secured against falling out and must not be removed!
2. Clean the clamping screw and actuating thread and check
for damage to the thread flanks. Replace if necessary.
3. Lubricate the clamping screw and actuating thread.
4. Screw the clamping screw into the product.
5. Check the clamping force }Chap.5.2.
5.4Storage
– Lightly oil the entire surface of the product.
– Only store the product in an unclamped state and protected
against corrosion.
– Store the product in a suitable transport container.
– Protect the product from excessive temperature fluctuations.
NOTE: Before recommissioning, clean the product and check
for damage, functionality and tightness!
6Disposal
– Follow local regulations on dispatching product components
for recycling or proper disposal.
– Alternatively, you can return the product to SCHUNK for
correct disposal.