SCHUNK ROTA EP 380-127, Assembly And Operating Manual, Page: 52 / 73

Commissioning and maintenance
52 02.00|0889073_ROTA TB-TBS-EP |en
two to three times without a workpiece; the fully extended jaw
stroke will then distribute the grease.
The chuck valve system must occasionally be lightly lubricated with
oil. In order to do this, the locking screw the face side of the chuck
first needs to be removed. The non-return valve is removed from
the bore hole, and the bore hole and the valve are cleaned to
remove dirt and any foreign bodies.
The fine serration of the base jaws and top jaws must be cleaned
when the hardened reversible jaws or soft top jaws are adjusted,
otherwise the run-out accuracy will be impaired.
Foreign matter, such as dust, scale, casting dust, and fine chips,
penetrates into almost every chuck, despite the optimal sealing
provided by closed base jaws and the hardened guide bushing in
the through-hole. Coolant washes away lubricant. As such, every
chuck must occasionally be completely disassembled, cleaned and
lubricated, and the sealing rings replaced if necessary. The time for
which the chuck can be used before full maintenance is required
depends on the level of dirt it accumulates and the clamping
frequency. As such, it is not possible to specify a generally
applicable rule for this.
Maintenance intervals
Lubrication of the grease areas:
Lubrication interval Strain
every 25 hours normal / coolant utilization
every 8 hours high / coolant utilization
after 1200 hours or
as needed
Total cleaning with disassembly of the
chuck, depending on type and degree of
contamination
Hardened Reversible Jaws and Soft Top Jaws
The fine serration of the base and top jaws for sizes 400 – 1200 is
3/32” x 90°, so the adjusting stroke from tooth to tooth is 2.4 mm.
Care must be taken to ensure that the top jaws are set on the
fine serration in such a way that a maximum of 2/3 of the jaw
stroke is extended for clamping (clamping reserve).
Hardened reversible jaws should only be used in sets in
accordance with the packaging, as they are ground on the chuck in
sets. 1 set of hardened reversible jaws is normally ordered for a
9.3
9.4