NF C 61-314 Figure 37 Appareil pour l'essai à la bille

Measurement & Analysis Instruments > Safety Instrument
Include ISO 17025 CNAS & ILAC Calibration Certificate
Origin: China Guangdong
Item No.: LX-Q02

NF C 61-314 Figure 37 Appareil pour l'essai à la bille


Ball-pressure Apparatus is used for testing parts of nonmetallic materials for resistance to heat. It is applicable to electrical equipment,lighting equipment, lowvoltage apparatus, Household electrical appliances, machine tool electrical appliances, motor, electric tools, electronic instruments, electrical instrumentation, information technology equipment, electrical business equipment, electrical fittings and accessories such as electrical and electronic products and its component parts

Ball-pressure Apparatus is the requirement ball(R2.5mm)and total test force 20±0.2N ball pressure testing device,pressure level of the state and was placed in the heating chamber on the surface of the test.


  • Ball holder with bore and clamping screw for the bow
  • Precision5mmpressure ball
  • Thermocouple for the test stand
  • Nickel plated steel materials for good thermal stability

Technical Parameters:

Ball diameter

5mm (R2.5mm)

Total test pressure


Samples bearing

diameter50mm, length100mm, solid stanless steel cylinder

Production of materials

all used stainless steel materials


Ball pressure instrument takes another a hot box (oven) supporting the use.

Resistance to heat

Self-ballasted lamps shall be sufficiently resistant to heat. External parts of insulating material providing protection against electric shock, and parts of insulating material retaining live parts in position shall be sufficiently resistant to heat.

Compliance is checked by subjecting the parts to a ball-pressure test by means of the apparatus shown.

The test is made in a heating cabinet at a temperature of (25 ± 5) °C in excess of the operating temperature of the relevant part according to clause 9, with a minimum of125 °Cfor parts retaining live parts in position and80 °C* for other parts. The surface of the part to be tested is placed in the horizontal position and a steel ball of5 mmdiameter pressed against this surface with a force of 20 N.

The test load and the supporting means are placed within the heating cabinet for a sufficient time to ensure that they have attained the stabilized testing temperature before the test commences.

The part to be tested is placed in the heating cabinet, for a period of 10 min, before the test load is applied.

If the surface under test bends, the part where the ball presses is supported. For this purpose if the test cannot be made on the complete specimen, a suitable part may be cut from it.

The specimen shall be at least 2,5 mmthick, but if such a thickness is not available on the specimen then two or more pieces are placed together.

After 1 hour the ball is removed from the specimen which is then immersed for 10 s in cold water for cooling down to approximately room temperature. The diameter of the impression is measured, and shall not exceed2 mm.

In the event of curved surfaces the shorter axis is measured if the indent is elliptical.

In case of doubt, the depth of the impression is measured and the diameter calculated using the formula f = 2 p (5 - p) , in which p = depth of impression.

The test is not made on parts of ceramic material.

Company introduction

HK LEE HING INDUSTRY CO., LIMITED are specialized in manufacturing special, custom built, test and measuring equipment for products testing as per international norms and offering calibration services and related information. Our products and services are used by research & development establishments, test laboratories, defense establishments, government institutions & manufacturing industries to fulfill the clients' requirements.

Main Products: Go No Go Gauges, IP Tester, Test Probe Kit, Impact Test Equipment, Test Probes, Spring Hammer, IEC 61032 Test Finger, Plugs and Socket Outlet Gauge, AC Hipot Tester, IEC Test Probe, UL Test Probe, Material Flammability Tester, IP Code Tester, Impact Test Apparatus, Security Testing Machine, Lamp Cap Gauge Tester, Lampholders Gauge Tester, Plug & Socket Tester, Electrical Safety Tester, LED Test Instruments, Environmental Test Equipment, Instrument Accessories, Weighing Sensor and More.

If you require equipment to test products such as home appliances, electrical accessories like switches, sockets, connectors, etc. industrial & road lighting luminaires, automobile lighting systems or related categories, we can provide the solutions you need.

We would appreciate your comments on the layout design, presentation or other aspects of our website.


Contact information

Contacts: Nina She


TEL: +86-755-33168386

FAX: +86-755-61605199

Phone: +86-15919975191


Address: 1F Junfeng Building, Gongle, Xixiang, Baoan District, Shenzhen, Guangdong, China

ZIP: 518102


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