WNT Centro-P Bedienungsanleitung Seite 5

Fitting Wrenches
Type Roller wrenches
ER8 Mini 84 950 050
ER11 Mini 84 950 080
ER16 Mini
84 950 026
ER16 conical 84 950 082
ER16 84 950 027
ER25 84 950 054
ER32 / OZ/462E 84 950 056
ER40
84 950 057
The maximum torque is detailed below and on the clamping nuts. Please note, however, the smaller the diameter to be clamped, the smaller the clamping torque required. In the case of finishing
operations we recommend tightening the clamping nut to 50-70% of the maximum tightening torque in order to achieve the optimum machining results by means of higher cushioning; otherwise, the
following maximum tightening torque – referenced to the diameter to be clamped – can be used.
Clamping torque (M ) for clamping nuts Centro-P
a
Type Ø max. M
a
ER8 Mini 1,0–2,5* 5Nm
ER11 Mini
1,0–2,5* 7Nm
ER16 Mini
1,0* 10Nm
ER16
1,0* 10Nm
conical
ER16
1,0* 10Nm
ER25 1,0–3,0* 25–30Nm
ER32 2,0–3,0* 30–35Nm
ER40 3,0–7,0* 60–70Nm
OZ/462E 2,0–3,0* 30–35Nm
The diameters marked with an asterisk * are clamping diameters with a short bore. The remaining diameters have a through bore.
7. Balancing
Most Centro-P collets are balanced as standard to G2.5 at 25,000 rpm or U ≤ 1 gmm. For higher demands they must be rebalanced. We will do this for you on request.
8. Changing the cutting tool
A roller wrench with a handle should be used to open the clamping nut. It is not recommended to open the clamping nut with a torque wrench.
It must be ensured that there is no swarf or dirt on the surfaces of the collet, which could negatively influence the system accuracy and damage the collet.
9. Changing the collet
When loosening the clamping nut the collet is extracted out of the chuck body. Having removed the cutting tool from the collet, lateral pressure to the collet will aid removal from the clamping nut.
10. Safety
Be aware of the safety instructions of the machine or other tools used! Never work with an open machine door, especially at high speed or when using HSK tapers. Collisions at high speed could result in
breakage of the cutting tool or collet chuck causing serious injury.
In cases where the balancing quality is relevant to safety or is prescribed by the machine manufacturer, the complete clamping system including the cutting tool must be checked for unbalance and
rebalanced if necessary.
11. How to solve possible faults?
Fault Cause
dirt/swarf in chuck body, clamping sleeve, clamping nut or at the tool shank
cutting tool itself inaccurate, for example long drills
tool shank is not clamped sufficiently, minimum 3/4 (for small Ø completely) of the
unacceptable tool runout
clamping length of the collet
a worn, damaged or third party collet is in use
tool shank contacts the chuck (possible especially with short chucks)
bearing in the pre-setter or in the accuracy check machine is not o.k.
bearing problem in the machine
unacceptable tool runout after
internal cone of the machine is worn or there is dirt/swarf
automatic tool change
automatic tool changer is not aligned to the machine spindle
wrong seal is inserted – shank-Ø is smaller than the Ø to be sealed
coolant is escaping through the
aggressive coolant pressure
clamping sleeve
tool is inserted with the cutting edge through the seal
coolant bores in the chuck, stop screw or the coolant supply of the machine are
no coolant comes through the tool
impaired.
Sales by:
CERATIZIT WNT Ltd
Sheffield Business Park
Europa Link
S9 1XU Sheffield
Heads for Torque Setting Wrenches
–
84 950 060
84 950 170
84 950 061
84 950 171
84 950 065
84 950 067
84 950 068
Ø max. M Ø
a
3,0–5,0 8Nm
3,0–7,0 10Nm –
1,5–3,5* 15–20Nm 4,0–10,0
1,5–3,5* 25–30Nm 4,0–10,0
1,5–3,5* 25–30Nm 4,0–10,0
3,5–6,5* 35–40Nm 7,0–10,0
3,5–6,5* 55–60Nm 7,0–15,5
8,0–11,0 100–110Nm 12,0–17,0
4,0–6,0* 55–60Nm 7,0–15,0
Freephone
Fax
E-Mail
Internet
max. M Ø max. M
a a
– – –
25–30Nm – –
50–55Nm – –
50–55Nm – –
50–60Nm 10,5–16,0 80–90Nm
110–120Nm 16,0–20,0 130–140Nm
140–150Nm 18,0–26,0 190–200Nm
110–120Nm 16,0–25,0 130–140Nm
Elimination
clean all parts intensively and ensure absolute cleanliness
check cutting tool accuracy
tool shank to be inserted the whole length of the collet
always use new precision collets 5µm resp. 2µm
pull the cutting tool out a little
check the concentricity in the collet taper bore (without collet)
clamp chuck by hand to check
replace seal for correct size
replace seal for new one
replace seal if damaged and re-position tool
clean the coolant bores with a cleaning medium (non-acidic, because of rust)
0800 073 2073
+44 114 242 8 835
wnt-uk@wnt.com
www.wnt.com
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EN