Hilgenberg supplies glass tubes and cylinders in various types of glass – either in full lengths or cut to size with subsequent hot or cold working. We also manufacture to customer specifications and in practically any length between 1 and 2000 mm. We also make precision glass tubes and cylinders with calibrated internal diameters and cylindrically ground outer surfaces – also technically polished on request. Click here for more information.


Listed below are the types of glass we process as standard. On request, we will be happy to provide other types of glass for your products. Alternatively, we can also process special glass supplied by our customers.

  • Soda glass (lime-soda glass)
  • Borosilicate glass 3.3
  • Neutral clear, and amber glass
  • Aluminosilicate glass (halogen glass)
  • Lead glass
  • Quartz glass
  • Sealing glasses
  • Coloured glass

The following shapes are possible:

  • Round
  • Four-sided/rectangular
  • Oval

Manufactured ready-to-use

The tubes can be cut to length using one of the following methods, each of which creates a specific surface image:


  • Score breaking sharp-edged, not 100% flat, cut surface is perfectly clear
  • Thermal shock breaking: sharp-edged, not 100% flat, cut surface is perfectly clear
  • Sawing: blunt, not 100% plane parallel, cut surface is matt, slight edge serrations are possible
  • Abrasive cutting: blunt, cut surface is plane parallel and matt, practically no edge flaking

Other possible processing steps

After cutting to length, we can carry out further processing steps. Some of the possibilities are:


  • Rounding or flame burnishing the edges
  • Chamfering the inner and outer edges
  • Dulling the surface (sand blasting)
  • Hot-shaping the ends
  • Drilling or expanding the cylinder ends
  • Glass tube with side-opening
  • Glass fibers with sphere formed end
  • NMR Tubes with thread for low vacuum applications
  • Mark tubes with special inner surface
  • Mini test tubes with extended flange
  • New preform for redrawing of capillaries
  • Test tubes with sagging at the bottom
  • Cloning cylinders with numbering
  • Large-volume theta cross-section capillaries
  • High tightness with new standard cap
  • Complex component made of quartz glass
  • Dropper pipettes in many sizes and designs
  • Packing glasses protected from light
  • Ampoules with built-in test leckage
  • Thick-walled sample vessels
  • Measuring ampoules with conical bottom
  • Special glass capillaries for measurements
  • Glass capillaries with constriction
  • Finely scaled glass cannulas
  • CNC processing of glass plates
  • New 5 mm NMR standard caps
  • Glass crucible for thermal analyses
  • Glass capillaries with graduation
  • Square capillary with 9 internal channels
  • 9-fold capillary made of borosilicate glass 3.3
  • Our tool for cutting glass capillaries
  • Diamond wire for cutting capillaries
  • Sight glasses (laser structured)
  • Very thick-walled capillaries
  • Polyimide coated filling needles
  • Ampoules with small volume
  • NMR tubes colored (UV protection)
  • NMR septum caps (increased denseness)
  • NMR tubes (barcode & constriction)
  • Mark tubes with perforated bottom
  • Test tubes with hole e.g. as vent
  • Test tubes with grooved rim
  • Oval capillaires (thin-walled)
  • Triangular capillaries (thin-walled)
  • Twisted capillaries by hot forming
  • Multi-channel capillaries (circular array)
  • Special light pipe made of glass
  • Luggin-capillary for measurements
  • Test mandrels (different materials)
  • Carpoules with special-rolled rim
  • Glass capillary for the stimulation
  • XRD-capillary with Luer-connector
  • Glass nozzle with seal-and retaining ring
  • Glass capillary with side-mounted connectors
  • Easily destructible glass ampoules
  • Glass rods with surface patterning
  • Long-conical focusing nozzles
  • Surface patterning of glass substrates
  • Laser sublimation-drilling in flat capillaries
  • Thin needles up to 180 ° flexible
  • Glass needles with curved tip
  • Polished to precision glass rings
  • Glass rods with partially-frosted surface
  • Sealing glass with high thermal expansion