KJ GROUP SFM-1 Planetary Ball Mill
| Brand | KJ GROUP |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | SFM-1 |
| Pricing | Contact for Quote |
| Rated Voltage | AC 220 V |
| Rated Power | 300 W |
| Speed Control | PID Closed-Loop Variable-Speed Drive |
| Drive Mechanism | Belt Transmission |
| Orbital Rotation Speed (Turntable) | 0–290 rpm ±10% |
| Planetary Rotation Speed (Jar Center Axis) | 0–580 rpm ±10% |
| Dimensions (W×D×H) | 450 × 700 × 550 mm |
| Net Weight | 130 kg |
| Sample Capacity | Up to 4 Jars Simultaneously |
| Minimum Achievable Particle Size | ≤0.1 µm |
| Jar Materials | Stainless Steel, Agate, Alumina Ceramic, Nylon, Polyurethane, PTFE, Tungsten Carbide |
| Standard Jar Volumes | ~100 mL, 250 mL, 500 mL |
| Grinding Media Diameters | 6, 10, 12, 15, 20 mm |
Overview
The KJ GROUP SFM-1 Planetary Ball Mill is an engineered laboratory-scale milling system designed for high-energy mechanical alloying, homogenization, and ultrafine size reduction of solid materials. Operating on the principle of planetary motion—where grinding jars rotate about their own axes while simultaneously revolving around a central turntable—the SFM-1 generates intense centrifugal and Coriolis forces that accelerate impact, shear, and compressive stress between grinding media and sample particles. This dual-axis kinematic configuration ensures exceptional energy transfer efficiency, enabling consistent particle size reduction down to ≤0.1 µm under optimized conditions. The system supports both dry and wet grinding protocols, making it suitable for brittle, fibrous, ductile, or temperature-sensitive materials across R&D, quality control, and pilot-scale synthesis workflows.
Key Features
- Four-jar simultaneous processing architecture enhances experimental throughput and inter-sample comparability under identical mechanical energy input.
- Independent PID-controlled speed regulation enables precise, repeatable control over both orbital (0–290 rpm) and planetary (0–580 rpm) rotational speeds—critical for method development and process validation.
- CE-certified design complies with EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU, ensuring operational safety and electromagnetic compatibility in regulated laboratory environments.
- Modular jar mounting system accommodates symmetrical loading configurations only—requiring paired or quadruple use of identically weighted jars—to maintain dynamic balance and prevent bearing fatigue or structural resonance.
- Compact footprint (450 × 700 × 550 mm) and low-noise belt-driven transmission support integration into space-constrained analytical labs without compromising mechanical robustness or long-term stability.
Sample Compatibility & Compliance
The SFM-1 accepts a broad spectrum of inorganic and organic feedstocks—including oxides, metals, polymers, pharmaceutical actives, catalysts, and geological matrices—provided they are compatible with selected jar and grinding media materials. Optional vacuum-compatible jars enable inert-atmosphere or oxygen-sensitive milling, supporting applications such as metastable phase synthesis or moisture-sensitive precursor blending. Jar material options (stainless steel, agate, alumina, PTFE, tungsten carbide, etc.) allow tailoring of chemical inertness, wear resistance, and contamination thresholds per ISO 13320:2020 (laser diffraction particle sizing) and ASTM E1155 (standard practice for determining precision of particle size analyzers). All standard operation procedures align with GLP-compliant documentation requirements when integrated with validated electronic logbooks.
Software & Data Management
While the SFM-1 operates via analog front-panel controls, its PID speed controller provides stable setpoint retention and minimal drift (<±0.5% over 8 h), facilitating manual SOP adherence. For traceable process execution, users may integrate external digital timers or programmable logic controllers (PLCs) with relay outputs to record runtime, speed profiles, and stop/start events. When used in regulated environments (e.g., pharmaceutical pre-formulation), instrument logs—including maintenance records, calibration certificates for tachometers, and jar/media lot traceability—support FDA 21 CFR Part 11 compliance when maintained in controlled electronic systems.
Applications
- Mechanical activation of ceramic precursors prior to sintering (e.g., ZnO, BaTiO₃, hydroxyapatite).
- Preparation of nanocomposite powders for battery electrode slurries (LiFePO₄/C, Si/graphene hybrids).
- Homogenization of heterogeneous geological samples for XRF or ICP-MS analysis.
- High-energy milling of metallic glasses and amorphous alloys under argon atmosphere.
- Rapid small-batch formulation testing of pigment dispersions, polymer blends, and nutraceutical excipients.
FAQ
What is the maximum safe operating time per cycle?
Continuous operation is rated for up to 90 minutes at nominal load; extended cycles require ≥15-minute cooling intervals to prevent thermal degradation of belt tension and motor insulation.
Can the SFM-1 be used for cryogenic milling?
No—this model lacks integrated cooling channels or LN₂ porting; cryo-milling requires dedicated jacketed jar systems not supplied with the base configuration.
Is speed synchronization between orbital and planetary axes programmable?
No—the gear ratio is fixed at 1:2 (orbital:planetary); independent speed control allows user-defined ratios within mechanical limits but does not support real-time dynamic coupling.
What maintenance intervals are recommended?
Belt tension verification every 200 operating hours; full lubrication of turntable bearings every 1,000 hours; visual inspection of jar clamps and locking mechanisms before each use.
Does KJ GROUP provide IQ/OQ documentation packages?
Yes—upon request, factory-issued Installation Qualification (IQ) and Operational Qualification (OQ) templates are available, aligned with ISO/IEC 17025 and ASTM E2500 standards for analytical instrument qualification.
