Bass HST-SYNCHRO User manual

HST-SYNCHR
O
Instruction Man
O
ual
FOR HST-SYNCH
R
20, 40, 60 AN
D
R
O
D
80

Instruction Manual
for HST-Synchro 20, 40, 60 and 80
page 2
Preface
Please read thoroughly through all safety and operating instructions for HST-Synchro tap
holder. This helps to avoid severe injuries and enables you to achieve better results.
Safety measures and rules of behavior
When working with HST-Synchro e. g. initial operation, operation or maintenance, you
have to observe the advice given in this instruction manual.
All safety measures and on-site regulations have to be respected when working with
HST-Synchro. Please pay attention to the safety notes on the machine or other tools in
use. Never leave the machine door open during operation.
Adequate clothing
The rotating spindle of a machine tool can seize loose clothing or long hair. During operation
of a machine tool, please wear close-fitting clothes. Do not wear jewelry nor a tie nor gloves or
similar. Tie back long hair or wear a hairnet.
Eye protection
Please always wear safety goggles with side protection in order to protect your eyes from
flying parts.
Correct workpiece clamping
Never hold the workpiece or the clamp of the workpiece by hand. The workpiece has to be
fixed on the machine table in a way that it cannot be moved nor turned nor lifted.
Please note!
Be particularly vigilant when you stand close to the machining zone. The machining zone
includes the machining spot as well as all transmission elements including the tap holder.
Keep out of the machining zone as long as the spindle is rotating. Always be aware of
potential dangers of a machining operation. Working on a machine often seems to be simple
routine and you do not realize the lapse in concentration during work. This deceiving feeling
of security can result in severe injuries.

Instruction Manual
for HST-Synchro 20, 40, 60 and 80
page 3
Application and Technical Data
Modern CNC machine tapping centers are designed to synchronize hole centerline spindle
rotation with the feed axis. However, due to machine wear out and misalignment, slight
variations do occur. Tap flanks must absorb the misaligned axial forces, what results in
premature tool wear and a drop of tool-life.
Herein lies the advantage of BASS HST-Synchro: It compensates CNC servo deficiencies and
provides an accurate thread pitch throughout the tapping cycle.
Specifications
•HST-Synchro is delivered together with the corresponding clamping nut, wrenches
and an instruction manual.
•Cutting / roll forming range – see table 1
•HST-Synchro can be used under normal working temperatures: 10-50° C.
•HST-Synchro KA is equipped with axial internal coolant (KA) and can be used with
lubrication pressure up to 80 bar (for HST-Synchro 20: only up to 30 bar).
•Choice of the right cutting / roll tap: Please use our taps and roll taps. They have
been specifically developed for operation with HST-Synchro. If you have any
questions, please do not hesitate to contact us.
•Always use steel collets with square ER-GB. They guarantee a reliable torque
transmission during the tapping process.
•Programming for thread cutting / forming is carried out with the standard cutting
cycle.
straight shank
hollow shank taper
hollow shank taper steep-angle taper
DIN 69871 steep-angle taper
MAS BT

Instruction Manual
for HST-Synchro 20, 40, 60 and 80
page 4
Type Cutting-
Range
Forming-
Range
Shank
(ø mm) Collets Article Number
Dimensions
mm *
Microcom-
pensation
mm +/-
D L1
20 HST-Synchro M2-M5 M2-M4 25 ER 11 026241 19 55 0,5
40 HST-Synchro M4-M12 M3-M10 25 ER 20 025116 34 68 0,5
40 HST-Synchro M4-M12 M3-M10 HSK 50 A ER 20 026248 34 107 0,5
40 HST-Synchro M4-M12 M3-M10 HSK 63 A ER 20 025118 34 107 0.5
40 HST-Synchro M4-M12 M3-M10 HSK 100 A ER 20 026243 34 114 0,5
40 HST-Synchro M4-M12 M3-M10 HSK 63 A ER 20 026249 34 on request 0,5
60 HST-Synchro M10-M20 M8-M18 25 ER 25 025117 42 88 0.5
60 HST-Synchro M10-M20 M8-M18 HSK 50 A ER 25 026251 42 127 0,5
60 HST-Synchro M10-M20 M8-M18 HSK 63 A ER 25 025119 42 127 0.5
60 HST-Synchro M10-M20 M8-M18 HSK100 A ER 25 026244 42 134 0,5
60 HST-Synchro M10-M20 M8-M18 HSK 63 A ER 25 026250 42 on request 0,5
80 HST-Synchro M18-M30 M18-M24 25 ER 40 026242 63 117 0,5
80 HST-Synchro M18-M30 M18-M24 HSK 63 A ER 40 026245 63 156 0,5
80 HST-Synchro M18-M30 M18-M24 HSK100 A ER 40 026246 63 163 0,5
40 HST-Synchro M4-M12 M3-M10 SK 40 ER 20 026252 34 103 0,5
40 HST-Synchro M4-M12 M3-M10 SK 50 ER 20 026254 34 103 0,5
60 HST-Synchro M10-M20 M8-M18 SK 40 ER 25 026255 42 123 0,5
60 HST-Synchro M10-M20 M8-M18 SK 50 ER 25 026256 42 123 0,5
40 HST-Synchro M4-M12 M3-M10 BT 40 ER 20 026258 34 95 0,5
40 HST-Synchro M4-M12 M3-M10 BT 50 ER 20 026259 34 106 0,5
60 HST-Synchro M10-M20 M8-M18 BT 40 ER 25 026260 42 115 0,5
60 HST-Synchro M10-M20 M8-M18 BT 50 ER 25 026261 42 126 0,5
40 HST-Synchro M4-M12 M3-M10 HSK 40 A ER 20 109495 34 110 0,5
60 HST-Synchro M10-M20 M8-M10 20 ER 25 107905 42 88 0,5
20 HST-Synchro M2-M5 M8-M18 20 ER 11 028012 19 55 0,5
40 HST-Synchro M4-M12 M3-M10 HSK 63 A ER 20 104171 34 152 0,5
40 HST-Synchro M4-M12 M3-M10 20 ER 20 107035 34 68 0,5
Table 1
* Dimensions for HST-Synchro tap holder with clamping nut and sealing disc

Instruction Manual
for HST-Synchro 20, 40, 60 and 80
page 5
Clamping of the Cutting Tool
Marking
Assembling sealing disk DS/ER
The disk must be flush with the outside of the nut and the
marking on the disk must be seen inside the nut.
Insert the small diameter of the disk into the center of the
clamping nut and apply even pressure until the disk is properly
seated into the nut.
Assembling collet ER-GB
Insert the groove of the collet into the eccentric ring of the
clamping nut at the mark on the bottom of the nut. Push the collet
in opposite direction until it engages audibly. Insert the tool.
Screw the clamping nut with the collet onto the tap holder.
Tighten the clamping nut with the provided wrenches. Mount
clamping nut and collet to the spindle.
Always enter the tool from the front side, so that the o-ring of
the sealing disk cannot be damaged. The clamping is
effected by the clamping nut with the provided wrenches –
see picture on page 6. Please respect the max. locking
torques – see table 2.
groove of the collet

Instruction Manual
for HST-Synchro 20, 40, 60 and 80
page 6
Locking Torques
Locking torques for HST-Synchro for provided collets.
Type max. locking torque
(Nm)
20 HST-
Synchro 16
40 HST-
Synchro 35
60 HST-
Synchro 104
80 HST-
Synchro 176
Table 2
wrench
wrench
Use the wrenches as
shown in the picture
below.
Do not hold here when tightening the nut.
Use only the provided wrenches to
tighten the clamping nut. DO NOT
HOLD ON THE SHANK WHEN
TIGHTENING, because the spring
can be damaged.
Attention: When the clamping nut is not
tightened thoroughly, the tap may fall out or be
pulled out of the collet. This can damage tap
and tap holder.
Whenever possible, please use ER-GB collets.

Instruction Manual
for HST-Synchro 20, 40, 60 and 80
page 7
Unclamping of the Cutting Tool
Loosen clamping nut
Pull out tap forwards
Disassembly
After removal of HST-Synchro: Unlatch the collet from the
clamping nut by lateral pressure on the rear part of the collet
opposite to the marking.
Removal of sealing disk
To remove the sealing disk, push on the sealing disk from the
outer side until it pops out.
Sources of Defect
Wrong handling affects true running of the
collet and can damage the clamping nut.
Before inserting the clamping nut make sure
that the collet is engaged properly! Never
clamp oversize shanks! e. g. Never use a
collet with Ø 12-11 mm for a tap with shank
Ø 12.2 mm. Please use the next larger collet
(here Ø 12.5-11.5 mm or Ø 13-12 mm).
Always try to clamp the tap shank along the
total length of the collet (but at least 2/3 the
length of the collet).
marking

Instruction Manual
for HST-Synchro 20, 40, 60 and 80
page 8
Storage
If you store HST-Synchro or if it is not in use, please see that it is dry and use oil to protect it
against corrosion.
Maintenance
HST-Synchro has to be cleaned in regular intervals depending on the degree of pollution. Do
not use aggressive solvents or loose fibers as e.g. cotton waste.
Checklist for Optimal Tapping
1. Check if the tap is new and has the right geometry for the intended application. It has to
be aligned correctly with the bore hole.
2. Check if the rpm of the machine spindles has been programmed correctly.
3. Are feed and feed stop correct, so that the tap will not hit the ground of the bore hole and
break?
4. Check if the workpiece is clamped firmly and that it will not become loose during
machining.
5. Did you pre-drill a bore hole with the correct diameter?
6. Check the programming of start and end position of the tool. At the end of the cycle the
tool must have left the bore hole completely.
7. Did you choose the right coolant / lubricant for the threading tool?
8. If you want to tap a blind hole, check if there is enough space for the chips.
Repair
Address for our repair service:
BASS GmbH & Co. KG
Technik für Gewinde
Bass-Strasse 1
97996 Niederstetten
Deutschland • Germany
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
or contact your BASS representative.
Dispatch of tap holders in need of repair:
Please send the complete HST-Synchro with collet and wrench to above mentioned address.
The following declaration should be stated on your repair order:
„We agree to repair and return of enclosed HST-Synchro, as long as the total costs do not
exceed 40% of the value of a new HST-Synchro.“
We are going to repair your HST-Synchro and return it together with the invoice by UPS
(parcel post on request). If the total repair costs exceed 40% of a new HST-Synchro, we are
disposed to send you an estimate of costs in advance. Repair will only be executed after
receipt of your approval.
Version 5/09 e