Rotary Microtome RD-485
Precision rotary microtome for tissue sectioning with 0.1-99.9μm thickness range, ±1% accuracy, and comprehensive specimen positioning for histological applications. Available model: RD-485.
Louise Corscadden, PhD
Director of Science · ConductScience
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The Semi-auto Tissue Rotary Microtome (Model RD-485) is a precision sectioning instrument designed for histological specimen preparation in research and diagnostic laboratories. This rotary microtome enables reproducible sectioning of embedded tissue specimens with thickness settings ranging from 0.1 to 99.9 micrometers for routine sections and up to 999 micrometers for trimming operations, with ±1% precision accuracy.
The instrument accommodates specimens up to 60mm x 50mm with comprehensive positioning capabilities including 360-degree rotation, XY orientation adjustment to -15 degrees, and specimen retraction functionality from 0-100 micrometers. Variable feed speeds from 0.1mm/s to 3.5mm/s provide operational flexibility for different tissue types and sectioning requirements. The robust construction and precise mechanical systems support consistent section quality for downstream microscopic analysis.
How It Works
The rotary microtome operates on the principle of precise mechanical advancement of embedded tissue specimens past a fixed cutting blade. The specimen holder advances incrementally with each rotation of the handwheel, with the advancement distance determined by the thickness setting mechanism. The cutting action occurs as the specimen block contacts the blade edge during the forward stroke of the rotary motion.
Specimen positioning is controlled through multiple axes: horizontal feeding up to 28mm, vertical feeding up to 60mm, and rotational adjustment through 360 degrees. The orientation system allows XY adjustment to -15 degrees for optimal sectioning angle. Specimen retraction capability prevents blade damage during return stroke by withdrawing the block from blade contact.
Feed speed control provides operational flexibility with slow speeds (0.1-1mm/s) for precision work and fast speeds (1-3.5mm/s) for rapid specimen advancement during setup. The precision mechanical system maintains ±1% accuracy across the full thickness range, ensuring reproducible section quality for microscopic analysis.
Features & Benefits
Model
- RD-485
Weight
- 35.0 kg
Dimensions
- L: 58.0 mm
- W: 49.0 mm
- H: 31.5 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Section Thickness Range | 0.1-99.9μm in 0.1μm increments | Basic models often limited to 1μm minimum thickness | Sub-micrometer precision enables ultra-thin sectioning for electron microscopy preparation and high-resolution analysis |
| Positioning Flexibility | 360° rotation plus XY orientation to -15° | Entry-level units provide basic rotation only | Multi-axis positioning accommodates complex specimen geometry and irregular anatomical structures |
| Feed Speed Control | Variable 0.1-3.5mm/s with continuous adjustment | Fixed speeds or limited adjustment ranges | Optimizes cutting conditions for different tissue types and reduces sectioning artifacts |
| Specimen Capacity | 60mm x 50mm maximum specimen size | Smaller units typically handle 40mm x 30mm blocks | Accommodates whole organ sections and large tissue arrays for comprehensive morphological studies |
| Precision Specification | ±1% thickness accuracy | Basic models may offer ±2-3% accuracy | Higher precision ensures reproducible measurements for quantitative histomorphometry |
| Retraction System | 0-100μm adjustable specimen retraction | Fixed retraction or manual adjustment | Prevents blade damage and specimen compression while maintaining optimal cutting geometry |
The RD-485 combines sub-micrometer thickness precision with comprehensive specimen positioning and variable speed control. The large specimen capacity and adjustable retraction system support diverse research applications requiring reproducible sectioning protocols.
| Model | SKU | Listed price | Status | Dimensions |
|---|---|---|---|---|
| RD-485 Legacy | RF-0002 | $4,999.00 | Available | 58.0 x 49.0 x 31.5 cm |
| RD-485 | RF-0013 | $4,999.00 | Available | 58.0 x 49.0 x 31.5 cm |
Practical Tips
Verify thickness calibration monthly using certified thickness standards and document results for quality assurance.
Why: Regular calibration ensures measurement accuracy and compliance with laboratory quality standards.
Clean and lubricate the feeding mechanism weekly and replace blades when sections show chatter or compression artifacts.
Why: Proper maintenance prevents mechanical wear and maintains consistent section quality.
Allow specimens and microtome to equilibrate to room temperature before sectioning to minimize thermal expansion effects.
Why: Temperature stability reduces thickness variation and improves section uniformity.
If sections appear compressed, reduce feed speed and verify blade sharpness before adjusting specimen retraction.
Why: Compression artifacts usually result from dull blades or excessive cutting speed rather than mechanical issues.
Document thickness settings, feed speed, and blade information for each specimen to ensure reproducible protocols.
Why: Consistent documentation enables protocol optimization and troubleshooting of sectioning problems.
Always engage specimen retraction when changing blades and use proper blade disposal containers.
Why: Retraction prevents accidental contact with sharp blades during maintenance procedures.
Optimize specimen orientation using the rotation and XY adjustment before beginning sectioning to minimize waste.
Why: Proper orientation ensures sections capture the desired anatomical plane and reduces specimen consumption.
Monitor section ribbon formation and adjust blade angle if ribbons curl excessively or fail to form properly.
Why: Proper ribbon formation indicates optimal cutting geometry and blade condition for consistent results.
Setup Guide
What’s in the Box
- Semi-auto Tissue Rotary Microtome main unit
- Blade holder assembly (typical)
- Specimen clamps and holders (typical)
- Calibration tools and standards (typical)
- Operating manual and documentation
- Power cord and electrical components (typical)
- Maintenance kit with lubricants (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering defects in materials and workmanship. Technical support and service documentation are available to ensure optimal instrument performance throughout the warranty period.
Compliance
What is the minimum section thickness achievable with this microtome?
The minimum section thickness is 0.1 micrometers with 0.1μm increments up to 99.9μm, providing precision suitable for high-resolution microscopy applications.
How does the specimen positioning system work for complex anatomical structures?
The positioning system offers 360-degree rotation, XY orientation to -15 degrees, plus 28mm horizontal and 60mm vertical feed range, allowing optimal alignment of irregular specimens.
What maintenance is required to maintain the ±1% precision specification?
Regular blade replacement, periodic thickness calibration verification, and lubrication of mechanical components according to the service schedule are essential for maintaining accuracy.
Can this microtome handle both paraffin and frozen tissue protocols?
The microtome is designed primarily for paraffin-embedded specimens. Frozen sectioning requires specialized cryostat equipment with temperature control capabilities.
What specimen retraction distance is recommended for delicate tissues?
Specimen retraction is adjustable from 0-100 micrometers. Delicate tissues typically benefit from minimal retraction (10-20μm) to reduce compression artifacts.
How does feed speed affect section quality for different tissue types?
Slower speeds (0.1-0.5mm/s) reduce cutting artifacts in hard tissues, while faster speeds (1-2mm/s) work well for soft tissues and routine processing.
What is the maximum block size that can be sectioned?
The instrument accommodates specimens up to 60mm x 50mm, suitable for whole organ sections and large tissue arrays in research applications.
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