STR4/3 8-Directional Tumbling Motion Stand
| Origin | Germany |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported Instrument |
| Model | STR4/3 |
| Pricing | Available Upon Request |
Overview
The STR4/3 8-Directional Tumbling Motion Stand is an engineered laboratory mixing platform designed for reproducible, low-shear, multi-axis agitation of sealed or capped sample containers. Unlike conventional orbital shakers or vortex mixers, the STR4/3 implements a precisely synchronized tumbling motion that combines simultaneous rotation about two orthogonal axes—horizontal (roll) and vertical (pitch)—while maintaining a fixed 45° inclination angle of the sample carrier. This kinematic configuration generates eight discrete directional transitions per full cycle, ensuring comprehensive homogenization without centrifugal segregation or sediment compaction. The system operates on the principle of gravity-assisted tumbling dynamics, making it especially suitable for powder blending, suspension reconstitution, pigment dispersion validation, and stability testing of viscous or particulate-laden formulations where mechanical shear must be minimized.
Key Features
- True 8-directional tumbling path achieved via dual-axis servo-controlled actuation, delivering uniform angular displacement across all motion phases
- Fixed 45° sample orientation optimized for gravitational mixing efficiency while preventing cap leakage in upright-capped vessels
- Universal Velcro-based retention system accommodating cylindrical containers from 20 mm to 200 mm in length and up to 120 mm in diameter—including standard reagent bottles, HDPE powder cans, steel paint pails, and glass jars with screw caps
- Robust aluminum alloy frame with vibration-dampened base mount, rated for continuous operation under ISO 14644 Class 7 cleanroom conditions
- Programmable motion profiles via front-panel interface: adjustable cycle count (1–999), dwell time per direction (0.5–5.0 s), and total runtime (1 min–24 h)
- CE-marked, RoHS-compliant, and designed to meet mechanical safety requirements per EN 61000-6-2 (EMC immunity) and EN 61000-6-3 (EMC emission)
Sample Compatibility & Compliance
The STR4/3 accommodates a broad spectrum of container geometries and materials without requiring custom fixtures. Verified compatibility includes borosilicate glass vials (ISO 8362-1), polypropylene centrifuge tubes (50 mL), HDPE powder drums (up to 5 L), and UN-certified steel paint containers (UN 1A2). All contact surfaces are electropolished stainless steel or food-grade silicone-coated polymer, compliant with USP for extractables testing. When used in regulated environments, the device supports GLP documentation workflows; although it lacks built-in audit trail functionality, its deterministic motion logic ensures full traceability of run parameters when paired with external logging systems. It is routinely deployed in accordance with ASTM D2244 (color measurement sample preparation), ISO 8502-9 (paint adhesion test specimen conditioning), and ICH Q5C (biopharmaceutical stability study protocols).
Software & Data Management
The STR4/3 operates as a standalone instrument with no embedded firmware or network connectivity. All operational parameters are set manually using tactile membrane buttons and a 3-digit LED display. No proprietary software, drivers, or cloud services are required. For laboratories requiring electronic recordkeeping, integration is achieved via optional RS-232 serial output (available upon request), enabling timestamped export of start/stop events and cycle completion signals to LIMS or ELN platforms. While the unit does not comply with FDA 21 CFR Part 11 out-of-the-box due to absence of user authentication and electronic signature capability, it may be qualified within a validated environment when operated under documented SOPs and paired with procedural controls for parameter verification and run log reconciliation.
Applications
- Homogenization of dry powder blends prior to content uniformity analysis (USP )
- Reconstitution of lyophilized biologics in glass vials without foaming or protein denaturation
- Stability assessment of suspensions and emulsions under accelerated aging protocols (ICH Q1A)
- Pre-test conditioning of coating samples for gloss, adhesion, and hardness evaluation (ASTM D523, D3359, D3363)
- Uniform dispersion of pigments, fillers, or nanomaterials in resin matrices for rheological pre-conditioning
- QC release testing of pharmaceutical excipients where flowability and blend uniformity must be preserved post-mixing
FAQ
Does the STR4/3 support programmable speed control?
No—the STR4/3 operates at a fixed angular velocity optimized for gravitational tumbling efficacy. Speed is not adjustable; motion fidelity is maintained through precise timing of directional transitions.
Can the unit be mounted inside a temperature-controlled chamber?
Yes, provided ambient operating conditions remain within 5–40 °C and relative humidity ≤80% non-condensing. The drive motor and electronics are rated for IP20 ingress protection.
Is calibration required or supported?
The STR4/3 is a mechanical motion platform with no sensor-based feedback loop. Calibration is neither specified nor necessary; performance verification is conducted via visual cycle counting and timing validation per internal QA checklist.
What maintenance is recommended?
Annual inspection of belt tension, bearing smoothness, and Velcro strap integrity is advised. Lubrication is not required; all moving components utilize self-lubricating polymer bushings.
Are replacement parts available for long-term support?
Yes—standard spare kits (belt assembly, mounting bracket, control board) are stocked by the authorized distributor and carry a 24-month warranty from date of shipment.
