Racket Striking Fatigue Test Machine (FH-1265) 

Note: This set includes a test machine and a monitor, but does not include the table shown in the picture.

Every strike measured. Every angle tested. Every failure caught before the customer finds it.

The FH-1265 drives a racket through repeatable strike cycles at adjustable speed and angle, measuring the real-time impact force of every single strike and accumulating the cycle count that reveals where and when the frame, shaft, or string bed will fail. A variable frequency motor with clutch controls the strike motion; a separate speed-adjustable motor with clutch controls the lift return — two independent drive systems that give precise, independent control over strike speed and return speed. Strike force up to 100kg is measured at ±1%FS accuracy, plotted as a force-time curve, and exported for analysis. Used for both one-time strike force characterization and multi-thousand-cycle fatigue life testing.

Quick Specs

• Force range: 100kg (±1%FS)

• Strike speed: 0–150RPM (±1%FS)

• Strike angle: Adjustable

• Strike speed: Adjustable (variable frequency motor)

• Drive: Variable frequency motor + clutch (strike) / speed-adjustable motor + clutch (lift)

• Display: PC with real-time force curve and cycle count

• Data export: Supported

• Power: AC 220V, 1kW, 5A

• Dimensions: ~1300 × 660 × 950mm

Table of Contents

1. Why Racket Striking Fatigue Testing Matters

2. Overview of the FH-1265 Test Machine

3. Standards and Regulatory Context

4. Main Test Functions

5. Design Features of the FH-1265

6. Technical Specifications

7. How the FH-1265 Testing Process Works

8. Benefits for Racket Manufacturers and Testing Labs

9. Choosing the Right Racket Striking Fatigue Tester

10. Real-World Application Scenarios

11. FAQs for the FH-1265

12. Related Testing Equipment

13. Get a Quote from Feihong Machine

Why Racket Striking Fatigue Testing Matters

A racket frame experiences a complex mechanical event every time it strikes a ball or shuttlecock. At the moment of impact, the string bed deflects and transfers a dynamic load into the frame — compressing the head, twisting the shaft, and transmitting a bending impulse through the handle into the player's hand. In a single match, a badminton player may execute 800–1,200 smashes, drives, and clears; a tennis player in a baseline rally may strike the ball 400–600 times per set. Over a racket's service life, the cumulative impact count can reach tens of thousands of cycles.

Each of those cycles loads the frame at the stress concentrations in the design — grommet holes, string channel edges, the shaft-to-head junction, the handle-to-shaft joint — in a pattern that is not visible in static strength tests. A frame that passes static load tests can still delaminate, crack, or lose stiffness within a season of competitive play if its fatigue resistance is inadequate for the cyclic strike loading it will actually encounter. This is why racket striking fatigue testing — applying repeatable, controlled strike cycles at measurable force — is a necessary step in design validation, material qualification, and production QC for rackets at any performance level.

The FH-1265 addresses both dimensions of this testing need: it measures the instantaneous strike force of every impact (characterizing the machine's loading consistency and the racket's response), and it accumulates fatigue cycles at defined angle and speed settings until the racket reaches its life limit or completes the target cycle count.

Overview of the FH-1265 Test Machine

The FH-1265 is a motor-driven racket striking fatigue tester with independent control of strike motion and lift return. The racket is mounted in the machine's fixture; a striking mechanism driven by a variable frequency motor through a clutch delivers impacts to the string bed or frame at the programmed angle, speed, and cycle count; a second speed-adjustable motor with clutch controls the lift return between strikes.

This two-motor-with-clutch architecture is the key mechanical design choice: by separating strike drive from lift drive, the machine allows strike speed (which determines impact energy and force) and return speed (which determines cycle rate) to be set independently. Faster return speed increases test throughput without changing the impact energy; slower strike speed reduces impact force for lower-load test conditions without changing the return timing.

A 100kg force sensor monitors the impact force of every individual strike in real time. The PC display plots force versus time for each strike cycle — giving engineers a continuous record of whether the machine is delivering consistent strike forces throughout the run, and whether the racket's structural response to impact is changing as fatigue accumulates. All force and cycle data is exportable for analysis.

Standards and Regulatory Context

Racket striking fatigue test methods are defined in a combination of international standards and governing body equipment specifications:

Badminton

ISO 9994:2019 — Badminton Rackets: Requirements and Test Methods ISO 9994 is the primary international standard for badminton racket testing. It includes fatigue and durability test methods covering the racket frame's ability to withstand repeated impact loads. The FH-1265's adjustable strike angle and force range cover the test parameters specified in ISO 9994 fatigue test clauses.

BWF (Badminton World Federation) Equipment Regulations BWF-approved rackets must meet defined performance and structural requirements. Fatigue resistance testing against impact loads is part of the qualification evaluation for rackets submitted to BWF approval programs.

Tennis

ITF Technical Regulations ITF approved racket testing includes frame performance tests under impact loading. The FH-1265's force range and cycle capability cover the testing parameters relevant to ITF frame approval evaluation.

ISO 4613 — Tennis Rackets ISO standards for tennis racket testing include impact and fatigue test methods applicable to the FH-1265's operating envelope.

Pickleball

USA Pickleball Equipment Standards USA Pickleball's approved paddle program includes performance consistency requirements evaluated through repeated impact testing. The FH-1265 is applicable to pickleball paddle strike fatigue testing.

General Sports Equipment

EN 17 / EN 71 — Sports and Toy Equipment Safety European safety standards for sports equipment include impact durability requirements that are evaluated through repeated striking tests applicable to the FH-1265.

Manufacturer-Defined Fatigue Life Specifications

Beyond formal certification standards, most professional-grade racket manufacturers define internal fatigue life specifications — a minimum number of strike cycles at defined conditions that the racket must survive without structural failure or significant performance degradation. The FH-1265's programmable cycle count and real-time force monitoring make it the standard tool for testing against these internal specifications.

Main Test Functions

1. Strike Force Test — Real-Time Force Measurement and Curve Export

The FH-1265 measures the impact force of every individual strike through the 100kg force sensor and displays the force-time curve for each impact in real time on the PC. This serves two purposes:

Machine characterization: The force curve confirms that the machine is delivering consistent strike energy at the programmed speed and angle setting — essential for establishing that test conditions are reproducible between test runs, between racket samples, and between operators.

Racket response characterization: The shape of the force-time curve changes as the racket's structural stiffness changes with fatigue accumulation. A racket that is losing stiffness due to delamination or micro-cracking will show a broader, lower-peak force curve compared to an undamaged racket at the same strike speed — providing an early indicator of structural degradation before visible failure.

All force curves and cycle data are exported via the PC interface for engineering analysis, QC documentation, and comparison between racket designs or production batches.

2. Life / Durability Test — Cycle Count at Defined Angle and Speed

The fatigue life test programs the machine to execute a defined number of strike cycles at a set angle and speed, running automatically to completion or until the racket fails (detected through force curve change or visible structural failure). Parameters:

• Strike angle: Adjustable — covers the range of impact angles from flat drive (perpendicular to string bed) to angled smash conditions

• Strike speed (RPM): 0–150RPM — adjustable to produce low-energy endurance testing (low RPM, many cycles) or high-energy accelerated testing (higher RPM, fewer cycles to failure)

• Cycle count: Programmable across the full range needed for standard-specified minimum cycle counts and internal life targets

• Real-time monitoring: Force per strike and cumulative cycle count displayed continuously throughout the run

Design Features of the FH-1265

Dual-Motor-with-Clutch Drive System

The core mechanical innovation of the FH-1265 is the use of two independent motor-and-clutch systems:

Strike motor: Variable frequency motor (VFD-controlled) with clutch — drives the striking arm through the impact event. VFD control gives precise, programmable speed control of the strike motion from 0 to 150RPM. The clutch allows the strike motion to be engaged and disengaged cleanly — important for consistent impact energy delivery and for protecting the motor from impact reaction forces.

Lift motor: Speed-adjustable motor with clutch — drives the return/lift motion that repositions the striking arm for the next cycle. Independent speed control of the lift means the return speed can be optimized for cycle rate without affecting strike speed or impact energy.

This architecture gives operators two independent variables to optimize: impact energy (controlled by strike motor speed) and test throughput (controlled by lift motor speed). A single-motor machine must trade off between these — faster return means faster strike, changing both throughput and impact energy simultaneously.

Adjustable Strike Angle

The striking arm angle is adjustable — allowing the machine to simulate different types of racket impact geometry:

• Flat drive: Strike perpendicular to the string bed plane, maximizing load on the string bed and head frame

• Angled smash: Strike at an angle to the string bed, loading the head-to-shaft junction and producing the torsional component characteristic of off-center smash impacts

Different racket designs have different vulnerabilities depending on the strike angle; testing at multiple angles gives a complete picture of the fatigue failure mode landscape.

100kg Force Sensor (±1%FS) with Real-Time Curve Display

Every strike is measured by a 100kg capacity force sensor with ±1%FS accuracy — equivalent to ±1kg absolute accuracy at full range. The PC displays the force-time curve for each impact in real time. At 150RPM (2.5 strikes per second), the system captures and displays approximately 2.5 complete force curves per second — confirming that the data acquisition speed is sufficient for real-time monitoring at maximum test speed.

PC Control and Data Export

The test is monitored and controlled via PC — displaying real-time strike force curves, RPM readout, cumulative cycle count, and test parameters. All data is exportable, supporting:

• Force curve analysis per strike

• Statistical summary across the test run (mean force, peak force, standard deviation)

• Fatigue life curve generation (force vs. cycle count as stiffness degrades)

• QC documentation and batch comparison reports

Technical Specifications of the FH-1265

Test Performance

Control and Data

Physical and Electrical

Why These Specifications Matter

• VFD-controlled strike motor is the specification that distinguishes repeatable, calibratable strike energy from mechanical cam systems at fixed speed. VFD control allows the strike speed — and therefore the impact energy — to be set precisely and reproduced exactly across multiple test runs and multiple machines, making test results comparable between labs and between test campaigns.

• Clutch on both drive axes protects the motors from impact reaction forces and allows the two motions to be timed independently. Without a clutch on the strike motor, the motor absorbs the rebound energy of every impact — accelerating motor wear and introducing variability in the strike force as motor back-EMF interacts with the impact.

• 100kg force range at ±1%FS — 1kg absolute accuracy covers both the moderate impact forces of a controlled badminton racket test (typically 10–40kg peak impact) and the higher forces of a tennis racket strike test (potentially 40–80kg peak). This single range accommodates multiple racket sports without sensor change.

• Real-time force curve per strike is what separates the FH-1265 from simple cycle counters: the force curve tells you not just how many cycles occurred, but whether each cycle delivered the same energy as the first. A force curve that progressively drops indicates structural softening — early detection of fatigue damage before visible failure.

How the FH-1265 Testing Process Works

Step 1: Racket Mounting and Angle Setting

The racket is mounted in the fixture at the required strike angle. Angle is set and locked before the test begins. The striking mechanism is positioned at the correct relationship to the racket's string bed.

Step 2: Strike Speed and Cycle Count Programming

Strike RPM (0–150RPM) and total cycle count are entered on the PC. For force characterization tests, a short cycle count at multiple speed settings is programmed; for life tests, the full target cycle count is set.

Step 3: Test Execution

The machine starts. The VFD-controlled strike motor engages through the clutch to deliver each impact; the lift motor returns the arm through its clutch for the next cycle. The force sensor captures the impact force for every strike; the PC plots the force-time curve in real time and increments the cycle counter.

Step 4: Monitoring and Auto-Stop

The operator monitors the force curve display throughout the run. Significant drops in peak force — indicating structural failure or delamination — are immediately visible on the real-time curve. The machine runs to the programmed cycle count or is stopped manually if early failure is observed.

Step 5: Data Export and Analysis

On completion, force curve data, peak force statistics, and cycle count are exported from the PC for engineering review, QC documentation, or comparison with other racket designs.

Benefits for Racket Manufacturers and Testing Labs

Quantitative Fatigue Life Data — Not Just Pass/Fail

Independent Strike and Return Speed Control

The dual-motor architecture enables test programs not possible on single-motor machines: high-speed return (fast cycle rate for throughput) with controlled strike speed (defined impact energy) — running 150RPM cycle rate while holding the strike energy constant at any programmed level within the range.

Adjustable Angle for Complete Failure Mode Coverage

Different failure modes dominate at different strike angles. Testing at multiple angles across the same cycle count reveals which failure mode limits the racket's service life — frame splitting at the head (dominated by flat perpendicular impacts), head-shaft junction cracking (dominated by angled impacts), or handle delamination (dominated by off-axis load transmission). Complete failure mode characterization requires variable angle testing.

Applications Across the Racket Sports Product Range

The FH-1265 covers badminton rackets, tennis rackets, pickleball paddles, and squash rackets — any racket-sport product where repeated impact fatigue is the service life-limiting failure mode. One machine serves the full racket sports product portfolio.

Choosing the Right Racket Striking Fatigue Tester

Single-Motor vs. Dual-Motor-with-Clutch

A single-motor striking machine links strike speed and return speed mechanically — faster cycles always means higher impact energy, and vice versa. For accelerated life testing (where you want to maximize impact energy to reduce test time) this is acceptable. For test programs that need to separate cycle rate from impact energy — for example, endurance testing at moderate energy for millions of cycles, or comparing frames at identical energy but different RPM — a dual-motor system with independent speed control is necessary.

Real-Time Force Measurement vs. Cycle Counter Only

A machine that only counts cycles tells you how many times the racket was struck — not whether each strike delivered the same energy as the first. Real-time force measurement per strike is essential for detecting progressive structural degradation during the test (rather than only at the post-test inspection) and for confirming that the machine is delivering consistent test conditions throughout a long run.

Force Range vs. Your Target Racket Type

Confirm that the machine's force range covers both the normal operating strike forces and any overload test conditions you intend to run. The FH-1265's 100kg range covers the full force envelope of badminton, tennis, pickleball, and squash racket testing; for specialized high-force applications, discuss range requirements with the supplier.

Angle Adjustability

If your failure mode analysis requires testing at multiple angles, confirm the machine's angle range and the precision with which the angle can be set and verified. The FH-1265's adjustable angle allows both perpendicular and oblique strike configurations.

Real-World Application Scenarios

A professional badminton racket manufacturer introduced a new ultra-thin shaft carbon layup to reduce frame weight by 4g. Before committing to production tooling, they ran ISO 9994 strike fatigue tests on the new shaft geometry alongside the existing shaft — using the FH-1265's real-time force curve to monitor stiffness change per strike. The new geometry showed measurable force curve softening at 8,000 cycles vs. the existing design's 18,000+ cycles, identifying an insufficient wall thickness in the new shaft before production investment was made.

A tennis racket brand conducting incoming QC on frames from a new composite supplier used the FH-1265 to run 500-cycle strike tests on 10 frames from the first shipment. Seven frames showed consistent force curves throughout; three showed progressive peak force decline starting at around 200 cycles — indicating resin/fiber adhesion inconsistency in the composite layup. The three failing frames were traced to a single production shift at the supplier, allowing selective rejection without returning the full consignment.

A sports equipment testing lab running pickleball paddle approval tests used the FH-1265 to evaluate the fatigue durability of four paddle materials (fiberglass face, carbon face, hybrid, and thermoformed carbon) under identical strike conditions — generating comparative cycle-to-softening data that a major paddle brand used to select their next-generation core construction.

FAQs for the FH-1265

What racket types can the FH-1265 test?

Badminton rackets, tennis rackets, pickleball paddles, squash rackets, and other racket-format sports equipment where repeated impact fatigue is the key life-limiting failure mode.

What is the difference between the force test and the life test?

The force test characterizes the strike impact force — measuring the force-time curve of each impact to confirm machine consistency and racket structural response. The life test accumulates strike cycles at defined angle and speed to determine the fatigue life cycle count before structural failure or unacceptable performance degradation.

Why are there two separate motors with clutches?

One VFD motor controls strike speed (impact energy); a separate speed-adjustable motor controls lift/return speed (cycle rate). This allows strike energy and test throughput to be set independently — a key capability for test programs that need to vary one without changing the other.

How is progressive fatigue damage detected during the test?

The real-time force curve per strike changes shape as the racket's structural stiffness decreases with fatigue damage. A racket losing stiffness shows a progressively lower peak force and broader force-time curve compared to the undamaged baseline. This change is visible on the PC display in real time — the operator can identify structural degradation before visible cracking or delamination occurs.

Can the strike angle be changed without remounting the racket?

The angle is set and locked before the test begins. Changing angle between test runs requires unlocking, adjusting, and relocking the angle setting — the racket does not need to be removed and remounted for angle changes if the fixture position is otherwise unchanged.

What data can be exported?

Force-time curves per strike, peak force values, cycle count, and statistical summaries (mean, peak, standard deviation across the run) are all exportable via the PC interface for engineering analysis, QC documentation, and inter-sample comparison.

What is the maximum strike speed?

150RPM — equivalent to 2.5 strikes per second. At 150RPM, a 10,000-cycle life test completes in approximately 67 minutes; a 50,000-cycle test takes approximately 5.6 hours.

Is the machine suitable for strung rackets or unstrung frames only?

The machine can test both. Strung rackets are tested for complete product life validation (representative of actual use conditions); unstrung frames can be tested for frame-only structural fatigue characterization, isolating frame fatigue from string bed effects.

Related Testing Equipment

• Racket Weight & Balance Point Test Instrument (FH-1378) — simultaneous weight (±0.2g), length (±0.5mm), and balance point (±0.05mm) measurement; pairs with FH-1265 for complete racket structural and performance characterization

• Ball Rebound Height Test Machine (FH-1389) — rebound height testing for sports balls used with the tested racket types

• String Tension Tester — measures string bed tension before and after fatigue testing to quantify tension loss as a performance degradation indicator alongside structural fatigue

• Racket Torsional Stiffness / Flex Tester — pre- and post-fatigue stiffness measurement to quantify structural degradation in absolute terms

• Scooter / Sports Equipment Drop Impact Test Machine — controlled drop impact testing for other sports equipment categories

Get a Quote from Feihong Machine

Feihong Machine (Dongguan Feihong Instrument and Equipment Co., Ltd.) designs and manufactures sports equipment testing machines for racket manufacturers, sporting goods brands, and testing laboratories worldwide.

To get started:

• Request a Quote — share your racket type, target standards or internal fatigue life specification, and required force range

• Request Technical Datasheet — full dimensional drawings and drive system specification

• Schedule a Demo — see the FH-1265 run a live badminton or tennis racket life test with real-time force curve display

Request a Quote →