TMI Model 22-34 Dual-Blade Specimen Cutter
| Brand | TMI |
|---|---|
| Origin | USA |
| Model | 22-34 |
| Cutting Width | 15 mm |
| Cutting Length | 254 mm |
| Dimensional Accuracy | ±0.05 mm |
| Construction | Hardened Steel Blade Assembly with Integrated Safety Guard |
Overview
The TMI Model 22-34 Dual-Blade Specimen Cutter is a precision manual cutting instrument engineered for consistent, high-reproducibility preparation of standardized test specimens from flexible sheet materials—including polymer films, paper, nonwovens, foils, and elastomeric sheets. Designed in accordance with ASTM D882, ISO 527-3, and TAPPI T494 protocols, this cutter delivers dimensional accuracy within ±0.05 mm across repeated cuts—critical for tensile, tear, puncture, and elongation testing where specimen geometry directly influences mechanical response. Its dual-blade configuration ensures simultaneous shearing action across the full 15 mm width, eliminating lateral distortion or edge curling common with single-edge cutters. The device operates without electricity or compressed air, relying on calibrated mechanical leverage and hardened tool-steel blade geometry to maintain long-term dimensional stability under laboratory or production-floor use.
Key Features
- Hardened steel dual-blade assembly with precisely ground cutting edges, optimized for uniform shear stress distribution across the 15 mm nominal cutting width
- Integrated safety guard mechanism that fully encloses the blade path during operation, meeting ANSI/ISEA Z87.1 impact resistance guidelines for operator protection
- Stainless steel base plate with engraved alignment scale (0–254 mm) and reference datum edge for repeatable positioning of sheet material
- Adjustable clamping bar with knurled thumb screws providing uniform pressure across the full 254 mm cutting length to prevent substrate slippage
- Modular construction enabling field replacement of blades and wear components without specialized tools or calibration recalibration
- Compliance-ready design supporting documented maintenance logs and traceable blade usage records per GLP and ISO/IEC 17025 requirements
Sample Compatibility & Compliance
The Model 22-34 accommodates sheet materials up to 2.0 mm thickness and minimum tensile modulus of 10 MPa—encompassing polyethylene terephthalate (PET), biaxially oriented polypropylene (BOPP), aluminum foil laminates, kraft paper, and vulcanized rubber sheets. Specimens are cut perpendicular to the machine direction unless otherwise specified by test method. The cutter conforms to dimensional tolerances required by ASTM D638 (Type V specimens), ISO 527-2 (Type 1BA), and EN 13924 (adhesive tape sampling). All structural components are RoHS-compliant and manufactured under AS9100D-controlled processes. Calibration verification procedures align with NIST-traceable dimensional standards; routine performance checks may be conducted using certified gauge blocks and optical comparators.
Software & Data Management
As a manually operated mechanical instrument, the Model 22-34 does not incorporate embedded electronics or software interfaces. However, its design supports full integration into digital quality management systems (QMS) through documented procedural controls. Laboratories utilizing LIMS platforms such as LabWare LIMS or Thermo Fisher SampleManager may assign unique cutter identifiers, record blade change dates, log operator certifications, and link specimen preparation events to downstream test results. Audit trails for cutter maintenance—including blade sharpening intervals, torque verification of clamping hardware, and periodic dimensional validation—meet FDA 21 CFR Part 11 requirements when implemented with electronic signature-capable documentation workflows. A printed calibration certificate (traceable to NIST SRM 2084) is supplied with each unit.
Applications
- Tensile property testing per ASTM D882 and ISO 527-3 for thin plastic films used in packaging and medical device barriers
- Preparation of standardized specimens for peel adhesion tests (ASTM D903, PSTC-101) and loop tack assessments
- Sampling of coated papers and release liners prior to surface energy or coefficient of friction measurement
- Generation of uniform strips for dynamic mechanical analysis (DMA) and thermomechanical stress relaxation studies
- Quality control sampling in roll-to-roll converting operations where batch consistency depends on precise specimen geometry
- Academic and regulatory research labs requiring ISO/IEC 17025-compliant specimen preparation infrastructure
FAQ
Is the Model 22-34 suitable for cutting carbon fiber prepreg or composite laminates?
No. The cutter is rated for homogeneous, isotropic sheet materials with maximum thickness of 2.0 mm and Shore A hardness below 90. Anisotropic or abrasive substrates may accelerate blade wear and compromise dimensional accuracy.
Does TMI provide calibration services or certified reference specimens?
Yes. TMI offers optional NIST-traceable calibration verification kits (including certified 15.00 ± 0.02 mm width gauges and 254.00 ± 0.03 mm length standards) and biannual on-site calibration support under service contract.
Can the cutting width be adjusted to 10 mm or 25 mm?
No. The Model 22-34 is configured exclusively for 15 mm width. Alternate widths require different blade assemblies and are available as separate models (e.g., Model 22-32 for 10 mm, Model 22-36 for 25 mm).
What is the expected service life of the dual-blade set under typical QC lab usage?
With proper cleaning and storage, and assuming ≤500 cuts per week on standard PET film, the factory-installed blades maintain ±0.05 mm tolerance for ≥18 months before scheduled replacement.
