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OnBuy.com£10.86Visit shop Faithfull Internal Spring Caliper 5063750551814
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The Range£11.00Visit shop Faithfull Internal Spring Caliper A - Multi Colour
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The Faithfull Internal Spring Caliper is an essential precision tool for machinists, woodworkers, and metalworkers who need to accurately measure the internal dimensions of bores, holes, or gaps. It is specifically designed for users who prioritize mechanical reliability over digital convenience, offering a balanced, durable steel construction. While it provides excellent tactile feedback and precision, users should note that it requires manual measurement transfer using a secondary reference tool like a precision rule to obtain an absolute reading.
| Model Part Number | 1240274 |
|---|---|
| Brand | Faithfull |
This model has a 75mm (3in) capacity, meaning it is optimized for internal measurements up to that width.
No, this is an analog manual tool. You must use a separate measurement device, such as a ruler or depth gauge, to determine the exact numerical value of the setting.
It is designed for workshop use. If used outdoors or in damp conditions, it must be dried and oiled immediately to prevent corrosion.
Avoid dropping the tool, as impact can deform the treated points. If the points become blunt, they must be carefully dressed by a professional with metalworking experience.
No, this is an internal spring caliper. For external measurements, you should use an external spring caliper or an outside micrometer.
Clean the threads of any debris and apply a small amount of machine oil or lubricant.
Ensure the bow spring is properly seated and that the tensioning nut is adjusted for appropriate friction.
Gently remove light rust with a fine abrasive pad, clean with a solvent, and apply a light protective coat of oil.
Setting up the tool involves nothing more than ensuring the adjustment screw moves freely. Before initial use, verify that the points meet perfectly when closed to ensure calibration accuracy. If the adjustment feels stiff, a tiny drop of light machine oil on the threads of the adjustment screw can improve performance.
To ensure the longevity of your Faithfull caliper:
