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Product Information Capillary Grinder

Catalogue Numbers:

04-10   Capillary grinder (with 25 mm mounting post)
04-15   Capillary grinder, complete with stereomicroscope

Capillary Grinder   Capillary grinder (w/o bracket)


The standard version of the capillary grinder (04-10) includes a mounting bracket with 25 mm post for attachment of Wild® and Olympus® stereomicroscopes. The grinder is also available for Wild microscopes that feature a rack-and-pinion drive (04-12, special order), or as a complete system, with a stereomicroscope (04-15).

Instrument set-up:

Mount stereomicroscope on mounting bracket using supplied Allen keys. If necessary, adjust height of the bracket so that the optical axis of the microscope lines up with the upper surface of the grinding stone. Working distance may be changed by inserting the mounting screw into a different hole in the bracket. The motor of the grinder runs on 110V (50/60 Hz). Alternatively, the grinder may be connected to an AC power supply providing a variable voltage of 70V - 110V (0.1A). Running the motor at less than 110V will reduce vibrations.

Operating instructions:

Insert capillary into one of the V-groves on the holder and select desired grinding angle. Lower holder until the capillary tip almost touches the surface of the stone. Attach extender rod to the Z-control knob in a position that allows convenient operation of height adjustment while viewing the capillary tip through the microscope.

Grinding of glass capillaries is performed wet, i.e. the stone should be covered by a thin film of water. Water is supplied from a needle which may be connected to an infusion bottle or any other type of low pressure water delivery system (use deionized, or distilled water only). For drainage of waste water, connect water outlet of acrylic glass housing to a sink or any suitably sized container.

Make sure that the motor is running before turning on the water supply as otherwise water may enter the motor housing. Carefully adjust rate of water flow so that the film of water is as thin as possible while still being continuous. Lower capillary until tip touches the surface of the stone. Do not apply too much pressure onto the tip of capillary. If necessary, perform grinding in several steps. Cut water supply before switching off grinder.


Plastic parts may be cleansed in a warm soap solution (hand dish washing detergent). The acrylic glass drainage housing can be removed for cleaning by loosening two mounting screws. The surface of the grinding stone may be wiped clean with a lint-free cloth soaked in gasoline (cleaning grade). Afterwards, the stone should be wetted with water. Do not use aggressive organic solvents that could result in damage to plastic parts. At all times, prevent fluids from reaching the inside of the motor housing.

Leveling grinding stone:

The surface of the grinding stone must be absolutely level. An uneven height of the stone is evident from the capillary riding up and down in sync with the revolution of the motor. Grinding stone can be balanced by adjusting the 3 build-in set screws (labelled 1-3, see above figure). Use special Allen key with short arm for this purpose. Removal of drainage housing greatly facilitates adjustments.

Set screw


2 Allen keys (included with grinder). See price list for other accessories.

©Vestavia Scientific, LLC [1/1/2007]