Instruction Manual
for
DEUBLIN
Bore-Mounted
Two-Channel Rotating Unions
Model/Series:
1112-240-001
Number:
Release: 275 V
Page 3 of 11
DEUBLIN Company • 2050 Norman Drive • Waukegan IL 60085-6747 USA • +1-847-689-8600 •
+1-847-689-8690 •
Dimensions
Operating Parameters
The
inner
channel of 1112-240-001 uses
DEUBLIN
patented Pop-Off™ seal technology. This kind of seal
closes only when pressure is applied. When pressure is removed, the seal faces separate by a very small
distance. This eliminates friction and seal wear during operation without coolant, and therefore allows
unlimited “dry running” at high speeds. Pop-Off™ designs should be considered when machining will occur
with and without through-spindle coolant (TSC). Because the seals separate during tool changes, when
coolant pressure is off, residual coolant in the supply hose and spindle can drain past the seal faces. Therefore,
a Pop-Off™ union requires a downward-pointing drain line to direct such residual coolant into the sump.
Pop-Off™ seals are not intended for rotation with pressurized dry air.
The
outer
channel of 1112-240-001 uses
DEUBLIN
patented AutoSense™ seal technology. Like pop-off
designs, AutoSense seals close when coolant pressure is applied to contain the coolant fluid, and “pop” apart
in the absence of coolant pressure to allow unlimited dry running. In addition, AutoSense seals handle
pressurized dry air by creating a microscopic gap between the seal faces. AutoSense unions handle coolant,
MQL, and dry air, by sensing the kind of media and automatically changing seal operation in response. As
with pop-off seals, a drain line is required.