GDS ALLIGATOR Installation guide

Assembly instructions // Instruction manual
ALLIGATOR
Fully automatic hydraulic expansion
precision clamping system
grinding deserves SOLUTIONS

2
As a result of continuous improvement and further development of our designs, the information and illustrations in this brochure are not binding.
The specifications and installation lengths of the machine manufacturer must be observed. All specifications are in mm. Errors and omissions excepted.
GDS ALLIGATOR interference contour
69,95
For information on intermediate sleeves, see page 8.
49,8
61
65
102
17,5
19,9
35,8 38,2
74
25°
28
53,9
Machine spindle
ALLIGATOR interference contour

3
Commissioning ALLIGATOR
Mounting screw
Intermediate Sleeve Adjustment pin
Dial gauge
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4
As a result of continuous improvement and further development of our designs, the information and illustrations in this brochure are not binding.
The specifications and installation lengths of the machine manufacturer must be observed. All specifications are in mm. Errors and omissions excepted.
Commissioning ALLIGATOR
1. Screw the chuck onto the facing unit using the
screws supplied. When doing so, please tighten
the mounting screws only slightly. (The mounting
screws will be tightened later during run-out ad-
justment).
Step 3: Mount chuck
1. Clean all contact surfaces of the chuck.
2. Make sure that the face of the machine interface is
level and clean.
3. The ALLIGATOR chuck should be at ambient tempe-
rature.
1. Turn the blue ring to OPEN (Fig. 1).
Step 4: Preparation for intermediate sleeve
View blue ring open
Fig. 1
1. Move the machine control to the front.
2. Screw the clamping claw into the machine spindle
as far as it will go, then unscrew it by approx. 1⁄
turns.
3. Check whether the face contact of the chuck rests
on the face contact of the machine interface; if this
is not the case, screw in the clamping claw further
and repeat the check.
Step 2: Screw in clamping claw
Intermediate sleeve must NEVER
be clamped empty.
Mounting screws
Step 1: Preparation

5
Commissioning ALLIGATOR
1. Insert the intermediate sleeve into the clamping system
in line with the radial bore of the intermediate sleeve and
the marking on the chuck.
2. Now turn the blue ring to CLOSE (Fig. 2). If the blue ring
cannot be turned to CLOSE, turn the intermediate sleeve
slightly until the radial locking hole is in the correct posi-
tion so that the blue ring can be closed.
3. The intermediate sleeve should now no longer be able to
be pulled out or twisted.
4. Insert the setting pin into the intermediate sleeve and
then move the clamping claw backwards with the machine
control. The adjusting pin is now clamped.
1. Screw in the bayonet insert (Order No.: 250001638) tightly
counterclockwise using the assembly key (Order No.:
250001590).
2. Now push the intermediate sleeve into the chuck until
you feel a stop.
3. Now turn the intermediate sleeve clockwise until the
groove of the intermediate sleeve engages in the bayonet
insert.
4. Then turn the intermediate sleeve counterclockwise to
the stop. It should now no longer be possible to pull the
intermediate sleeve out to the front.
5. Insert the setting pin into the intermediate sleeve and
then move the clamping claw backwards with the machine
control. The adjusting pin is now clamped.
Step 5: Insert intermediate sleeve with radial locking
Step 5.1: Insert intermediate sleeve with bayonet lock
View blue ring closed
Fig. 2
ATTENTION: Move the tensioning claw to the rear to
tension the setting pin.
ATTENTION: Before each machine shutdown,
make sure that a tool remains
in the intermediate sleeve.
The blue ring
must NOT be closed.
Note:
Bayonet insert and mounting key are
not included in the scope of delivery
(see Accessories p.8).

6
As a result of continuous improvement and further development of our designs, the information and illustrations in this brochure are not binding.
The specifications and installation lengths of the machine manufacturer must be observed. All specifications are in mm. Errors and omissions excepted.
Commissioning ALLIGATOR
Change intermediate sleeve Remove chuck
• Move the clamping claw forward to open the chuck.
Remove the blank.
• Move the clamping claw forward to open the chuck.
Remove the blank.
• Screw the new intermediate sleeve into the chuck as
described on page 5.
• Loosen the four mounting screws.
• Remove the chuck from the machine and pack it in
the original bag.
Pay attention to corrosion protection.
• Turn the blue locking ring from CLOSE to OPEN and
turn out the intermediate sleeve.
• Turn the blue locking ring from CLOSE to OPEN and
turn out the intermediate sleeve.
• Clamp a new adjustment pin and check the runout
error with the dial gauge.
Step 1: Step 1:
Step 3: Step 3:
Step 2: Step 2:
Step 4:
Note: When you remove the chuck with intermediate
sleeve, the blank must be in the intermediate sleeve.
1. Align the chuck with an alignment hammer (made of
plastic or copper) by tapping lightly on the alignment
surface.
2. After achieving the desired concentricity, tighten the
mounting screws crosswise with 12 Nm.
3. Done, now you can start grinding.
Step 6: Adjustment
Use precision dial gauges when adjusting.
Pay attention to the quality of the setting pin.
Setting concentricity and repeatability
Please take the time to adjust the concentricity. The more accurately the chuck is set, the more accurately it will
behave.
Alignment surface
ATTENTION: Do not knock on the blue locking ring. To
ensure proper functioning, disassemble and clean the
chuck once a month.

7
GDS ALLIGATOR Safety // Sources of error
To note:
• The ALLIGATOR series (chuck) was designed for loading and changing rotationally symmetrical
blanks and tools with shank tolerance h6 or more accurate.
• For shank tools, all shanks according to DIN 1835 Form A, B, E or DIN 6535 Form HA, HB, HE
can be clamped.
• The ALLIGATOR series (chucks and intermediate sleeves) may only be used within the scope of
their technical data.
• This product is intended for industrial use.
• Intended use includes compliance with all the information in this manual.
• Flawless function, as well as warranty claims, can only be guaranteed with original GDS acces-
sories.
GDS ALLIGATOR Safety Instructions
GDS ALLIGATOR error causes and solutions
Check the following points:
• Check clamping pressure
• Check blank
• Contamination
• Locking mechanism (blue ring) correctly closed
• All mounting screws correctly tightened
• Chuck requires room temperature
• Open everything again, clean and start again step by step

8
As a result of continuous improvement and further development of our designs, the information and illustrations in this brochure are not binding.
The specifications and installation lengths of the machine manufacturer must be observed. All specifications are in mm. Errors and omissions excepted.
GDS ALLIGATOR
The new ALLIGATOR hydraulic expansion precision clamping system can be used
in the following tool grinding machines:
Accessories for ALLIGATOR:
Intermediate bushings with bayonet locking
for automatic bushing exchange
Item No. Name d
350112403 Intermediate sleeve BJ ø20 x 64 3
350112404 Intermediate sleeve BJ ø20 x 64 4
350112405 Intermediate sleeve BJ ø20 x 64 5
350112406 Intermediate sleeve BJ ø20 x 64 6
350112407 Intermediate sleeve BJ ø20 x 64 7
350112408 Intermediate sleeve BJ ø20 x 64 8
350112409 Intermediate sleeve BJ ø20 x 64 9
350112410 Intermediate sleeve BJ ø20 x 64 10
350112411 Intermediate sleeve BJ ø20 x 64 11
350112412 Intermediate sleeve BJ ø20 x 64 12
350112413 Intermediate sleeve BJ ø20 x 64 13
350112414 Intermediate sleeve BJ ø20 x 64 14
350112415 Intermediate sleeve BJ ø20 x 64 15
350112416 Intermediate sleeve BJ ø20 x 64 16
350112417 Intermediate sleeve BJ ø20 x 64 17
250001590 Mounting wrench D20
250001638 Bayonet insert
Reinecker
Item No.
400002006
ANCA
Item No.
400002002
ISOG
Item No.
400002005
Walter
Item No.
400002001
Saacke
Item No. 400002003
Spindle with union nut
Item No. 400002004
Spindle with flat contact face
Item No. Name d
350111903 Intermediate sleeve RS ø20 3
350111904 Intermediate sleeve RS ø20 4
350111905 Intermediate sleeve RS ø20 5
350111906 Intermediate sleeve RS ø20 6
350111907 Intermediate sleeve RS ø20 7
350111908 Intermediate sleeve RS ø20 8
350111909 Intermediate sleeve RS ø20 9
350111910 Intermediate sleeve RS ø20 10
350111911 Intermediate sleeve RS ø20 11
350111912 Intermediate sleeve RS ø20 12
350111913 Intermediate sleeve RS ø20 13
350111914 Intermediate sleeve RS ø20 14
350111915 Intermediate sleeve RS ø20 15
350111916 Intermediate sleeve RS ø20 16
Intermediate sleeves with radial locking

GDS Präzisionszerspanungs GmbH
Endelbergstrasse 8
D - 72131 Ofterdingen
Telefon: + 49 (0) 74 73 - 27 26 72
Telefax: + 49 (0) 74 73 - 27 26 49
Email: [email protected]
Web: www.gds-praezision.de