Union, Pop-Off, Pin-Drive, 12 mm pilot, G 3/8"
1109-051-423
- Single passage for coolant or MQL
- Pop-Off™ technology allows unlimited dry running without media pressure
- Full-flow design has no obstructions to trap swarf or debris
- Bearing-supported with threaded rotor for easy installation
- Dual angular contact ball bearings
- Labyrinth system and large vents to protect ball bearings
- Balanced mechanical seals made from silicon carbide for long life even under difficult operating conditions
- Anodized aluminum housing resists corrosion
Dimensions

A
Pin-DrivePin-Drive
B
G 3/8"-19G 3/8"-19
C
53.5 mm2.106 "
D1
123 mm4.843 "
E
25 mm0.984 "
F
0 mm0 "
G
12 mm0.472 "
I
12.01 mm0.473 "
J
98 mm3.858 "
P
G 1/4"-19G 1/4"-19
X
15.9 mm0.626 "
Operating Specifications


Media
Coolant, MQLCoolant, MQL
Rotor Connection
Pin-Drive Pin-Drive
Supply Connection
G 3/8"-19 G 3/8"-19
Coolant Max. Flow
81.8 l/min21.6 GPM
Coolant Max. Pressure
69 bar1000 psi
Coolant Max. Temperature
71 °C160 °F
MQL Max. Flow
2040 l/min72.1 CFM
MQL Max. Pressure
10 bar150 psi
MQL Max. Temperature
71 °C160 °F
Documents & Resources
Installation Guide
Installation Guide for Rotor-Mounted unions
Interface Drawing
Interface Control drawing for 1109-051-423
Operating Manual
Operating Manual for "Pop-Off" unions for machine tools