Cylindrical Mandrel Bend Tester

Cylindrical Mandrel Bend Tester

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Cylindrical Mandrel Bend Tester

Caltech Engineering Services offers cylindrical mandrel bend tester. Cylindrical Mandrel Bend Tester is a mechanical unit for determining the elasticity, adhesion and elongation properties of cured coatings on sheet metal. The instrument has hand operated lever for testing the flexibility and the adhesive properties of coatings when these are subjected to bending stresses. The frame has a bending lever with height-adjustable rollers and a sliding vice for clamping the sample which means the test pieces are bent perfectly and regularly on decreasing mandrels until the desired effect can be observed. The instrument can be adjusted to the diameter of the mandrel used and the mandrels are easily changed. A wide range of mandrels in metric size diameters is available. Mandrels are supplied with the instrument.

Testing with the cylindrical mandrel bending tester determines the greatest cylinder diameter. The lever of the bending mechanism is turned towards operator side. This motion releases the receptacle for the mandrel. The required mandrel is put in place. The test sheet is inserted vertically between the mandrel and the pressure rollers (with the coating facing towards the bending lever) and pushed between the clamping jaws located below.

To allow adjustment of the clamping unit the clamping jaws should not be fully tightened at this stage.

Pull the black rotary knob to slide the inserted test sheet with the clamping unit via the guide rods into its position against the mandrel. Then tighten the black rotary knob completely to secure the clamping unit with the test sheet in this position. The pressure rollers are now applied to the test sheet and the mandrel beneath by rotating the screw on the bending lever. Turn the bending lever until it reaches the stop on the right-hand side of the instrument. Testing can be used in as per ASTM D 522-B, ASTM D 1737, and ISO 1519-2

Technical Specifications


(L x W x H) 320 x 135 x 130mm (12.6 x 5.3 x 5.1”)

Net weight

4.6 kg

Specimen Width Max

64mm (2.5”)

Max. Specimen Length

80 to 10omm

Metric Mandrel Set, 2 to 32mm (2, 3, 4, 5,6,8,10,12, 16, 20, 25, 32mm)