Leica RM2255 Automatic Microtome

The Leica RM2255 is a motorized rotary microtome.

The specimen feed system with zero-backlash and maintenance-free cross roller guides and the stepper motor operated coarse feed system are located in a dustproof plastic housing.

The instrument is equipped with a safety handwheel with a handle that can be centered, as well as a mechanical handwheel lock.

All controls and LEDs are centralized in a separate control panel.

All control elements are logically arranged in functional groups and easily identifiable.

The specimen retraction can be turned off.

In manual operation the retraction can be adjusted. In motorized operation the retraction value varies with the selected sectioning speed. An LED illuminates while the sample is in retraction.

The electric coarse feed operates at two speeds. In the sectioning mode, the coarse feed buttons have a STEP function.

Three motorized sectioning modes (CONT, SINGLE, and STEP) are available as well as one manual sectioning mode, the rocking mode (ROCK).

In rocking mode, it is enough to move the handwheel a short distance back and forth in order to create a section.

Section thickness setting range: 0.50 – 100 μm

Setting values: from 0.50 μm – 5.0 μm in 0.5 μm increments, from 5.0 – 20.0 μm in 1.0 μm increments, from 20.0 – 60.0 μm in 5.0 μm increments, from 60.0 – 100.0 μm in 10.0 μm increments

Trimming section thickness setting range: 1 – 600 μm

Setting values: from 1.0 – 10.0 μm in 1.0 μm increments, from 10.0 – 20.0 μm in 2.0 μm increments, from 20.0 – 50.0 μm in 5.0 μm increments, from 50.0 – 100.0 μm in 10.0 μm increments, from 100.0 – 600.0 μm in 50.0 μm increments.

Object feed: 28 mm ±1 mm, feed motion via step motor

Vertical stroke: 70 mm

Maximum sectioning area w/o retraction: 65 mm without specimen orientation

Maximum sectioning area with retraction: 60 mm

Specimen retraction in manual sectioning mode: 5 – 100 μm in 5 μm increments; can be turned off

Specimen retraction in motorized sectioning mode: varies with the sectioning speed; can be turned off

Electric coarse feed: 300 μm/s and 900 μm/s

Sectioning speed: 0; 0.5 – 420 mm/s ± 10%

Return speed: approx. 120 – 420 mm/s ± 10%

Repositioning of knife holder base: north-south: ± 24 mm, east-west: ± 23 mm

Maximum specimen size (WxHxD): 50 x 60 x 40 mm

Specimen orientation: horizontal 8°, vertical 8°

Working height (knife blade): 100 mm (measured from the base plate)

Working height (knife blade): 168 mm (measured from the table)

Dimensions (WxDxH): 413 x 618 x 305 mm

Weight: 37 kg

Control panel dimensions (WxDxH): 121 x 166 x 50 mm

Weight: 660 g