QualiTorque™ Series – Bottle Cap & Closure Torque Testing
A torque tester is a precision instrument that measures the rotational force — torque — required to apply or remove a threaded closure from a container. For packaging containing liquids, powders, or sensitive products, the torque applied to a cap during capping and the torque required to open it afterward are two of the most consequential quality parameters on the production line. Under-torqued closures fail to seal, allowing leakage, contamination, and product loss during transport and storage. Over-torqued closures create ergonomic problems for consumers, cause stripped threads, and can generate excessive torque retention that triggers child-resistant closure failures or makes senior-friendly packaging inaccessible. Measuring and controlling both application (locking) and removal (opening) torque is therefore a fundamental quality control function in any packaging operation where threaded closures are used.
Qualitest's QualiTorque™ Series spans four models covering every level of torque testing need in packaging quality control and research. The QualiTorque™ 100 is a portable, battery-operated handheld instrument designed for flexible use on the production floor, during incoming closure inspection, or at any point in the packaging line where a QC technician needs immediate torque data. The QualiTorque™ 200 is a benchtop manual instrument manufactured to ASTM standards, delivering consistent, operator-stable readings for routine laboratory QC without automated mechanics. The QualiTorque™ Auto-D1 introduces motorized automatic operation at a fixed default speed of 10 RPM, with selectable peak-judgment or time-judgment stop modes and full support for ASTM D2063, D3198, and D3474. At the top of the range, the QualiTorque™ Auto-D2 adds variable-speed digital motor control from 0.50 to 23.00 RPM, data sampling at up to 1,200 Hz, real-time torque curve display, TCP/IP PC connectivity, and Windows software for complete torque-angle analysis and automated reporting — making it the platform of choice for packaging R&D, child-resistant closure qualification, and high-throughput automated QC environments.
Applications in Industries
Food & Beverage Packaging Cap application and removal torque testing on PET, HDPE, and glass bottles for water, juice, condiments, sauces, and dairy. Ensures closures are tight enough to prevent leakage in transit but easy enough for the end consumer to open — a critical balance for customer satisfaction and product safety. | Pharmaceutical Packaging Torque qualification of child-resistant (CR) and senior-friendly (SF) closures on prescription bottles, OTC medication packaging, and liquid medicine containers per ASTM D3198 and 21 CFR requirements. Automated models support GMP documentation with repeatable, auditable test results. |
Personal Care & Cosmetics Opening and closing torque measurement for shampoo, lotion, cream, and cosmetic tube closures. Verifies that nozzles and pump caps apply and release within ergonomic limits while remaining leak-proof during distribution. | Household & Industrial Chemicals Closure integrity testing for cleaning products, detergents, adhesives, lubricants, and agricultural chemical containers. Correct torque application prevents leakage of hazardous contents and ensures child-resistant performance where required by regulation. |
Packaging R&D and Line Qualification Torque-angle curve analysis using the QualiTorque™ Auto-D2 supports closure design development, thread geometry optimization, capping machine speed validation, and new SKU qualification before production launch. | Quality Control & Incoming Inspection In-line or at-line torque checks on finished goods and incoming closure components. The portable QualiTorque™ 100 allows QC technicians to sample anywhere on the production floor, while the benchtop 200 and automatic D1/D2 handle high-volume laboratory testing. |
Product Comparison Table
Specification / Feature | QualiTorque™ 100 (Portable Manual) | QualiTorque™ 200 (Benchtop Manual) | QualiTorque™ Auto-D1 (Automatic) | QualiTorque™ Auto-D2 (Advanced Auto) |
Operation Type | Manual / portable | Manual / benchtop | Automatic motor-driven | Automatic motor-driven + PC software control |
Test Modes | Locking & opening torque (CW & CCW) | Locking & opening torque (CW & CCW) | Opening force mode; Locking force mode; Peak or time-stop judgment | Opening & locking force; continuous torque curve; direction of torsion recorded |
Rotation Speed | Manual (operator-controlled) | Manual (operator-controlled) | 10 RPM (fixed default); adjustable as needed | 0.50–23.00 RPM (digital speed control) |
Data Sampling Rate | — | — | — | Up to 1,200 Hz |
Clamp / Fixture | Manual clips; force buffer included | Manual clips; force buffer included | Locking clamps; manual tighten | Custom fixture per sample size |
Display | LCD display; data tracking & storage | Digital display; direct reading | Digital display; direct reading | PC software display; real-time torque curve |
Torque Units | lbf·in, kgf·cm, N·m | lbf·in, kgf·cm, N·m | lbf·in, kgf·cm, N·m | lbf·in, kgf·cm, N·m |
Data Output / Connectivity | Internal storage (LCD) | Internal display (direct read) | Internal display; peak or time mode output | TCP/IP interface; Windows PC software; full curve export |
Software / PC Control | — | — | — | ✓ (Windows; keyboard & mouse; optional purchase) |
Real-Time Torque Curve | — | — | — | ✓ |
Power Source | Rechargeable battery (charging cable included) | AC powered | AC powered | AC powered |
Portability | ✓ (handheld) | — (benchtop) | — (benchtop) | — (benchtop) |
Standards Compliance | ASTM D2063, ASTM D3474 | ASTM D2063, ASTM D3474 | ASTM D2063, D3198, D3474 | ASTM D2063, D3198, D3474 |
Compatible Closures | Bottles, tubes, spouts, screw caps | Bottles, nozzles, tubes, screw caps | Bottles, cartons, cans, plastic caps | Bottles, cartons, cans, plastic & metal caps |
Accessories Included | Main body, clips, force buffer, charging cable | Main body, clips, force buffer | Main body, locking clamps | Main body, custom fixture (per sample size) |
Best For | Field QC; incoming inspection; portable production-line use | Lab QC; routine cap torque testing; cost-effective | Regulated QC lines; standardized auto testing; pharma & food | R&D; full curve analysis; high-throughput automated QC; child-resistant closures |
* All models measure both locking (CW) and opening (CCW) torque. Torque ranges and resolution vary by model — contact Qualitest for full technical datasheets. Voltage requirements: AC models 110–240 V compatible; QualiTorque™ 100 operates on rechargeable battery.
Why Choose Qualitest for Your Torque Testing Needs?
✔ Complete Manual-to-Automated Range From the rechargeable-battery QualiTorque™ 100 for portable field checks, to the PC-controlled QualiTorque™ Auto-D2 with 1,200 Hz data sampling and full torque curve export — Qualitest covers every level of cap torque testing from a single product family. | ✔ ASTM-Compliant Testing at Every Tier All four QualiTorque™ models are designed and manufactured in accordance with ASTM D2063, D3474, and D3198 — the primary standards for torque retention, calibration, and child-resistant closure testing — ensuring data that stands up to regulatory and customer audits. |
✔ Bi-Directional Measurement — Locking and Opening Every QualiTorque™ model measures both clockwise (locking / application) and counterclockwise (opening / removal) torque, providing the complete picture of closure integrity that neither half alone can deliver. | ✔ Real-Time Curve Analysis for R&D and QC The QualiTorque™ Auto-D2’s continuous torque curve capture at up to 1,200 Hz and variable-speed motor (0.50–23.00 RPM) reveal the full torque-angle profile of a closure — enabling failure mode analysis, thread-design optimization, and automated pass/fail reporting far beyond what a peak-only reading provides. |
✔ Child-Resistant Closure Testing Ready The QualiTorque™ Auto-D1 and Auto-D2 comply with ASTM D3198 — the standard specifically covering testing of child-resistant closures — making them direct tools for pharmaceutical packaging qualification and compliance programs. | ✔ 26+ Years of Packaging Testing Expertise Qualitest has served customers in 122+ countries for over 26 years with packaging and quality control testing instruments. Our application engineers help you select the right torque tester model, configure test protocols, and interpret results — before and after the sale. |
Close Every Cap with Confidence
Every threaded closure on every product you ship represents a quality promise to your customer, your retailer, and your regulatory authority. Whether that closure is a child-resistant pharmaceutical bottle cap, a high-volume beverage PET closure, a cosmetic pump dispenser, or an industrial chemical container, the only way to know it was applied correctly is to measure the torque. The QualiTorque™ Series gives your QC team the right instrument for that measurement at every point in your operation — from the receiving dock to the laboratory to the production floor. With ASTM-compliant designs, models from portable handheld to fully automated PC-controlled, and real-time curve analysis for engineering-level closure development, Qualitest has the torque testing platform your packaging program needs. Contact Qualitest today to speak with a packaging testing specialist, request a product demonstration, or receive a quotation for any model in the QualiTorque™ Series.
