Micro Chuck Manual
1. Product description.
The ALBRECHT Micro Chuck is a high precision toolholder with an integrated clamping screw. Its unique design
provides a high run-out accuracy as well as a positive dampening feature for clamping of tools with cylindrical shafts for machining
(milling, finish-milling, HSC-milling, drilling, tapping, reaming). The Micro uses a special collet to clamp the cutting tool and is operated
by a hex key from the behind.
2. Warranty
period for Micro-products is 12 months after delivery date ex works assuming intended use. Wear parts are not a part of the
warranty (Key, clamping-screw).
3. Intended use.
ALBRECHT Micro Precicion-Chucks are especially for use for clamping rotationally symmetrical tools with cylindrical
shafts. Applicable shaft types: DIN 1835 A, B and DIN 6535 HA, HB with shaft diameter tolerance of h6. This product may only be used
within the restrictions of its technical specifications (see chapter 8). To use this unit as intended, it is also essential to comply with the
manufacturer's specifications regarding operation, installation and maintenance. The clamping of tools and the insertion of the Micro
chuck into DIN spindle with a standardized interface must only be done by technically trained personnel in compliance with this
operation manual. The maximum tool weight is to follow by the machine manual. For additional bores, threads or attachments which are
not offered as accessories by ALBRECHT, written permission of ALBRECHT is mandatory. For long, overhang or heavy tools and
extensions, the max. rpm should be reduced. Check specification which are laser marked on the tool where applicable. Failure to comply
with the minimum insertion depth of tool, there is a risk of damage and loss of accuracy. To avoid corrosion, please notice the mixing
ration of the coolant according to the manufacturer.
4. Safety instructions.
CAUTION:
When used with rotation, protective covers must be provided. (According to EG-
machinery directive 2006/42/EG point
1.4.2.2. B). Otherwise there is a danger of serious injury.
CAUTION:
When changing tools, there is a risk of injury due to sharp edges and contours. Wearing of protective gloves is recommended.
CAUTION:
In case of failure to comply with the minimum insertion depth of tool, risk of breakage increases dramatically. (Flying parts
may constitute a risk of injury)
ATTENTION:
When untighten the tool, please ensure to hold the tool tight that it does not fall and damages itself or workpiece.
5. Cleaning, inserting the collet.
Before each use, clean the tool shaft, inner-cone of Micro and collet (tapered surface, bore) with
suitable tools.
Recommendation: Dissolve grease film / dirt with acetone or isopropanol. To completely remove grease and dirt particles use a lint-free
cloth and a cleaner. Attention, do not work with compressed air during the cleaning process, as otherwise dissolved dirt particles can get
into parts of the gearbox.
Insert the cleaned the undamaged tool shank into the clamping sleeve, observing the minimum clamping depth, see chapter 8. Screw the
clamping sleeve with tool into the chuck manually until the clamping sleeve touches the cone. Each time the tool is changed make sure
the bore, the tool shank, the cone of the clamping sleeve and the inner-cone of Micro are degreased for maximum clamping forces.
6. Clamping. Put in the hex key as far as possible. Use
only the original ALBRECHT hex key. Hex tool surface
is to be inspected for damages!
The chucking procedure
start with inserting the hex key (SW3) from behind
through the chuck and rotating the hex key clockwise.
Max. clamping torque see mark on the Micro. Use only
clamping key which is included or the torque key
(3-5,4Nm) item-no: 139 0005 900 0.
7. Releasing.
Open the Micro by turning the hex key counter-clockwise. Note: when opening the Micro, you must overcome two
resistance points. First, you will overcome the friction torque and then the collet is loosened. Then open until the tool can be taken out, or
rather the collet can be unscrewed manually.
8. Technical Data
- Clamping depth
depending on clamping diameter:
Ø
tmin
tmax
2-4
18
36
5
18
28
6
26
36
Min. Clamping depth = tmin,
Max. Clamping depth = tmax.
- Max. r.p.m. see product-marking,
- Max. operation temperature: 10-110°C
- Max. coolant pressure: 100 bar
9. Balancing grade.
Each ALBRECHT Micro Chuck is fine-balanced without collet and tool according to the laser marking. Higher
balancing quality and rpm on request. The use of shanks with recesses affects the balancing grade.
10. Maintenance.
The ALBRECHT Micro Precicion-Chuck is maintenance free over its lifetime. After usage clean the Micro (especially the
inner cone) and collet including thread after usage with a solvent base cleaner. The cleaning intervals have to be adjusted to degree of
contamination and environmental conditions. After cleaning, apply a thin coat of anticorrosive to all parts.
11. Repairs.
In order to guarantee the precision of the tool, any Micro in need of repair has to be send to the manufacturer or to an
authorized national agent only. We recommend checking the chuck and the collet for run-out deviations and gripping torque periodic,
especially after a tool break or crash.
Albrecht Präzision GmbH & Co. KG, Antoniusstr. 25, 73249 Wernau, Germany
Tel: +49 (0) 71 53-30 06-0, [email protected], www.albrecht-germany.com
