Lenz - The Specialist for Ground Joints

The Lenz® range of ground joint instruments With decades of experience, advanced technological know-how and the outstanding properties of DURAN® glass we guarantee the proven quality of our precision ground joints. The Lenz® range of ground joint instruments includes conical joints, stopcocks, ground joint flasks, separating and dropping funnels as well as a large range of ground joint components.

Quality with system

Lenz® ground joint instruments are produced according to the standard DIN 12242 / ISO 383. Each production step is tested by a quality management system, based on DIN ISO 9001 / EN 29001. The tests are examined by a cone measuring device for checking the taper, a surface roughness meter for testing the roughness parameters and a wall thickness measuring apparatus with a magnetic inductive measuring process to guarantee a homogenous concentricity and wall thickness.

Product features

High taper accuracy of the cones
Precise concentricity
Small roughness of the surface
Excellent tightness
Minimized need for grease
No bend out of line