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Roundfin RD-355ATK Microtome

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Roundfin RD-355ATK Microtome

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Roundfin Lab, Pathology & Blood Bank

Roundfin RD-355ATK Microtome

±1% Precision. 70×70mm Specimen. 0.25 μm Minimum. Dual Mode. Green Digital Display.

The Roundfin RD-355ATK Microtome is a fully automatic rotary microtome delivering consistent, highly reproducible tissue sections through motorised specimen advancement, featuring ±1% precision, a 70×70 mm maximum specimen size, dual automatic and manual modes, a pure-green digital display, a 0.25 μm minimum section thickness, and a 1–600 μm section and trimming range. Available through Medigear.uk.

Sections

Microtomes

Categories

Lab, Pathology & Blood Bank

Condition

New

Origin

China

Seller Type

Certified Professional Seller

CE & ISO Certified

Global Shipping

Supplier: Medigear

The Roundfin RD-355ATK Microtome is a fully automatic rotary microtome that adopts state-of-the-art technology and demonstrates Roundfin's commitment to quality and excellence in microtomy. By integrating the high speed of a manual microtome with the precision of motorised specimen advancement, the RD-355ATK provides consistent, highly reproducible tissue sections for demanding diagnostic and research applications. Medigear.uk supplies the RD-355ATK and can advise on configuration and installation.

The section thickness setting range is 1–600 μm, with a minimum of 0.25 μm. Graduated increments cover 0.5 μm from 0.25–2.5 μm, 1 μm from 2.5–10 μm, 2 μm from 10–30 μm, 5 μm from 30–60 μm, and 10 μm from 60–100 μm. Trimming thickness range is 1–600 μm, with increments of 1 μm from 1–10 μm, 2 μm from 10–20 μm, 5 μm from 20–50 μm, 10 μm from 50–150 μm, and 50 μm from 150–600 μm. Precision and error is ±1%. Specimen retraction range is 0–50 μm, with selectable steps of 5 μm, 10 μm, 15 μm, or 50 μm, or off.

Maximum specimen size is 70×70mm. Specimen horizontal feed is 30mm, and vertical feed is 72mm. Specimen clamp rotation is at any angle within 360°. The movement range of the specimen holder base is 65mm (front-to-back). Specimen orientation system is XY-8°. Feed speed ranges from 1500 μm/s to 3500 μm/s. Voltage is AC220V±10% 50Hz (standard) or AC110V±10% 60Hz. Power is 100W. Net weight is 35KGS. Dimensions are 420mm (L) × 600mm (W) × 310mm (H).

The pure-green digital display shows slice thickness, trimming thickness, slice count, and slice speed. Safety features include emergency braking, alarm, overload protection, and auto-sleep functions. Flexible clamp switching supports fast change between paraffin block and cassette clamps. We can provide the full specification and supply terms on request.

NHS histopathology departments, hospital diagnostic laboratories, and specialist pathology services requiring the highest-precision, fully automatic microtome in the Roundfin range represent the primary procurement context for the Roundfin RD-355ATK Microtome. The ±1% precision specification — matching the manual RD-475 rather than the ±5% of the RD-355AT — makes the RD-355ATK appropriate for demanding diagnostic sectioning, where section-thickness consistency affects staining quality and diagnostic interpretability. The 70×70mm maximum specimen size additionally accommodates oversized blocks from surgical resections that the RD-355AT cannot handle. Medigear.uk supplies the RD-355ATK and can provide NHS procurement documentation.

Research institutions, university histology departments, and specialist laboratories requiring high-precision automated sectioning with large specimen capacity will find the RD-355ATK's combination of ±1% precision and 70×70mm capacity uniquely positioned in the Roundfin full-auto range. The 0.25 μm minimum section thickness and 1–600 μm range support applications ranging from ultra-thin sections for high-resolution studies to thick sections for whole-mount, neurological, and plant anatomy preparations. Medigear.uk can advise on RD-355ATK configuration for research and educational procurement.

Surgical pathology services and cancer diagnostic centres processing large-format resection specimens benefit from the RD-355ATK's 70×70mm specimen capacity and ±1% precision, which support the diagnostic standards required for cancer pathology reporting. The dual automatic and manual modes also provide flexibility for complex specimens that require manual attention alongside routine automated sectioning. Medigear.uk can advise on the suitability of the RD-355ATK for surgical pathology applications.

Laboratories comparing the RD-355ATK against the RD-355AT will find the RD-355ATK provides superior precision (±1% vs ±5%), larger specimen capacity (70×70mm vs 50×45mm), and a broader section range. Medigear.uk can provide a full comparison between the RD-355AT and RD-355ATK to support procurement decisions.

±1% Precision — Superior to the RD-355AT and All Other Full-Auto Roundfin Models

The RD-355ATK's ±1% precision matches the tightest specification in the entire Roundfin microtome portfolio — the manual RD-475 — and is five times tighter than the ±5% precision of the RD-355AT and the manual RD-315, RD-465, and RD-495 models. For applications where section thickness consistency directly affects diagnostic or research outcomes — including immunohistochemistry, fine-morphology diagnostic work, and quantitative histology research — the ±1% precision of the RD-355ATK provides a meaningful quality advantage over instruments with a ±5% specification.

70×70mm Specimen Capacity — Largest in the Roundfin Full-Auto Range

The RD-355ATK's 70×70mm maximum specimen size matches the largest capacity in the entire Roundfin range (shared with the manual RD-495) and is significantly larger than the 50×45mm capacity of the RD-355AT. This capacity accommodates large-format surgical resection specimens — total prostatectomy, large bowel, mastectomy — that cannot be processed on smaller platforms without specimen trimming, supporting surgical pathology services as a primary procurement context alongside standard diagnostic histopathology.

1–600 μm Section and Trimming Range

The RD-355ATK's 1–600 μm section and trimming ranges are broader than the 0.5–100 μm section range and 0–500 μm trimming range of the RD-355AT, providing a wider working range within the full-auto format. The 600 μm upper limit supports thick-section preparation for plant anatomy, neurological research, and whole-mount preparation, as well as standard diagnostic sectioning, making the RD-355ATK a more versatile single-instrument solution for laboratories with varied sectioning requirements.

0.25 μm Minimum Section Thickness

The 0.25 μm minimum section setting provides finer control of minimum thickness than many comparable instruments, enabling ultra-thin section preparation for high-resolution diagnostic and research applications. The graduated increment structure, from 0.5 μm at the finest range to 10 μm at the coarser range, provides appropriate resolution across the full spectrum of sectioning requirements.

Full-Automatic Motorised Specimen Advancement

The full-automatic operating mode motorises specimen feeding for each cutting stroke, providing consistent, speed-controlled advancement without the handwheel-rotation variability of manual operation. The intelligent feeding system supports quick switching between automatic and manual modes, and continuous speed adjustment from 1500 to 3500 μm/s allows the operator to optimise cutting speed for different specimen types and embedding media.

Premium Position in the Roundfin Full-Auto Range

The RD-355ATK occupies the premium position within the Roundfin full-auto microtome product range, combining the highest precision (±1%), the largest specimen capacity (70×70mm), and the broadest section range (1–600 μm) of any Roundfin full-auto model. For laboratories whose clinical or research requirements demand all three performance parameters, the RD-355ATK is the definitive instrument in the Roundfin portfolio.

Multi-Function Drive with Automatic Retraction

The multi-function drive system provides sectioning, trimming, fast forward and backward specimen movement, and mode conversion, all with automatic retraction across selectable steps of 5 μm, 10 μm, 15 μm, or 50 μm. This integrated functionality eliminates the need for separate trimming workflows and manual retraction management, streamlining the complete preparation and sectioning cycle within the instrument.

Comprehensive Safety and Emergency Systems

Emergency braking, alarm, overload protection, auto-sleep functions, full-length red blade guard, and push-bar blade replacement provide comprehensive safety coverage for the full-automatic operating environment, where unattended or minimal-attendance sectioning cycles pose different safety considerations than purely manual instruments.

Section Thickness Range: 1–600 μm

0.25 μm minimum setting. Graduated increments from 0.5 μm to 10 μm. Broadest section range in the Roundfin full-auto microtome family.

Precision and Error: ±1%

Matches the precision of the manual RD-475. Five times tighter than the ±5% of the RD-355AT and manual RD-465/RD-315/RD-495 models.

Maximum Specimen Size: 70×70mm

Largest specimen capacity in the Roundfin full-auto range. Matches the manual RD-495. Supports surgical resection and large-format specimens.

Full Automatic and Manual Dual Mode

Motorised automatic mode for high-volume routine sectioning. Manual handwheel mode for specific tasks and operator preference. Quick switching between modes.

Pure-Green Digital Display

Real-time readout of slice thickness, trimming thickness, slice count, and slice speed—high-visibility green display format.

Specimen Retraction: 0–50 μm

Selectable 5 μm, 10 μm, 15 μm, 50 μm steps, or off. Protects specimen surface and reduces blade wear during return stroke.

Feed Speed: 1500–3500 μm/s

Continuously adjustable automatic sectioning speed. Optimise for specimen type and embedding medium.

Flexible Clamp Switching

Fast change between the paraffin block clamp and the cassette clamp. Supports mixed specimen preparation protocols.

Multi-Function Drive System

Sectioning, trimming, fast forward/backwards, and mode conversion with automatic retraction in a single integrated drive system.

Comprehensive Safety Systems

Emergency braking, alarm, overload protection, auto-sleep, full-length red blade guard, and push-bar blade replacement.

Dual Voltage: AC220V/AC110V

Standard model 220V 50Hz and 110V 60Hz option. Supports international deployment.

Certification and Warranty

CE certified. 1-year warranty with lifetime technical support. Medigear.uk can advise on all supply and configuration options.

The Roundfin RD-355ATK Microtome is a full-automatic rotary microtome suited to NHS histopathology departments, hospital diagnostic laboratories, research institutions, specialist surgical pathology services, and laboratories requiring the highest precision and largest specimen capacity in the Roundfin full-auto microtome range for consistent, reproducible tissue sectioning across demanding diagnostic, research, and surgical pathology applications. Its ±1% precision, 70×70mm maximum specimen size, 1–600 μm section and trimming range, 0.25 μm minimum step, dual automatic and manual modes, pure-green digital display, and 1-year warranty with lifetime technical support deliver a premium, fully automated sectioning solution that exceeds the precision and capacity of the RD-355AT. Contact Medigear.uk for specifications, pricing, or expert procurement assistance.

FAQ

Frequently Asked Questions

Everything buyers need to know about sourcing medical equipment through MediGear.

The RD-355ATK and RD-355AT are both full-automatic rotary microtomes from Roundfin. Still, the RD-355ATK is the premium model with three key advantages: ±1% precision (vs ±5% on the RD-355AT), 70×70mm maximum specimen capacity (vs 50×45mm on the RD-355AT), and a broader 1–600 μm section and trimming range (vs 0.5–100 μm section range on the RD-355AT). The RD-355ATK's 0.25 μm minimum step is also finer, and its feed speed range of 1500–3500 μm/s differs from the RD-355AT specification. For laboratories requiring superior precision and larger specimen capacity, the RD-355ATK is the appropriate choice. Medigear.uk can provide a full side-by-side specification comparison.

The RD-355ATK's ±1% precision specification is the same precision rating as the manual RD-475 — and significantly tighter than the ±5% rating of the RD-355AT, RD-315, RD-465, and RD-495 models. In practical terms, at a target section thickness of 4 μm, ±1% precision means sections will be within ±0.04 μm of the target, compared to ±0.20 μm at ±5% precision. This tighter precision supports more consistent staining uptake, more reproducible morphological preservation, and higher diagnostic confidence in section-quality-sensitive applications such as immunohistochemistry and fine-morphology diagnostic work.

The 70×70mm maximum specimen size is the largest in the Roundfin full-auto microtome range, matching the manual RD-495 and exceeding the 50×45mm of the RD-355AT. This specimen capacity is clinically relevant for surgical pathology services processing large-format resection specimens — including total prostatectomy samples, large bowel resection specimens, and mastectomy tissue — that exceed the capacity of smaller microtome platforms. For laboratories that regularly encounter large blocks, the 70×70mm capacity eliminates the need to trim specimens to fit the instrument or use a separate, larger-capacity microtome for oversized blocks.

The minimum section thickness setting is 0.25 μm, accessed at the finest increment range of 0.25–2.5 μm with 0.5 μm steps. This minimum supports ultra-thin sectioning applications, including electron microscopy preparation, fine-morphology diagnostic work, and research applications requiring the thinnest possible sections. The 0.25 μm minimum is finer than the 0.5 μm minimum of many comparable instruments in the class.

In full-automatic mode, the RD-355ATK's motorised specimen feeding system advances the specimen automatically on each cutting stroke, eliminating the need for handwheel rotation and providing consistent, speed-controlled sectioning. In manual mode, the operator controls specimen advancement via the handwheel in the conventional manner. The intelligent feeding system described in the product literature enables quick switching between these modes, allowing the operator to use full-auto mode for high-volume routine sectioning and manual mode for specific tasks requiring closer operator control or for operators in transition from manual instruments.

The multi-function drive system supports sectioning, trimming, fast-forward and backward specimen movement, and mode conversion between automatic and manual modes, all with automatic retraction. The retraction function adjusts from 0–50 μm in selectable steps (5 μm, 10 μm, 15 μm, 50 μm) or can be turned off, protecting the specimen surface and blade during the return stroke and reducing consumable wear across the working session.

The comprehensive safety system includes emergency braking, alarm, overload protection, and auto-sleep functions. The full-length red safety bar on the blade holder protects the operator during sectioning, and the push bar enables quick and easy blade changes without direct blade contact. The laterally movable blade holder allows full use of the blade across three segments, maximising blade life before replacement.

The pure-green digital display shows slice thickness, trimming thickness, slice count, and slice speed in real time during the sectioning session. The green display provides a high-visibility readout of parameters during the working session. The display format provides the operator with comprehensive current parameter information without requiring reference to separate instrument settings.

Specimen retraction automatically withdraws the specimen by a set distance during the return stroke to prevent the block face from contacting the blade edge, protecting the specimen surface from drag damage and reducing blade wear. On the RD-355ATK, retraction is selectable between 5 μm, 10 μm, 15 μm, and 50 μm steps, or can be turned off entirely. This selectable retraction allows the operator to match the retraction distance to the specimen type and embedding medium for optimal protection, without excessive retraction that would add unnecessary time to each cycle.

The flexible clamp switching system supports fast change between paraffin block clamp and cassette clamp configurations, allowing laboratories to process both paraffin-embedded block specimens and cassette-embedded specimens on the same instrument within the same working session without extended instrument downtime for clamp changes. Medigear.uk can confirm compatible clamp types and switching procedure on request.