How does a magnetic base hold a dial indicator?
How does a magnetic base hold a dial indicator? |
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Dial indicators are mounted to the magnetic base by the backing plate or alternatively they can be held by the stem.For more information, see: Dial indicators | |||
Gripped by the stem |
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A dial indicator mounted by the stem will be held at the top in a collet.
Dial indicators held in this way will have a flat backing plate. |
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The stem of the dial indicator is inserted into a collet fitting, which fits around the stem and tightens to stop any movement when in use. | |||
Mounted on the backing plate |
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If a dial indicator is mounted by its backing plate, it will have either a lug or screw post back to it. This may be centred or off-centred but the mounting will be the same. | |||
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LugA dial indicator with a lug back is held to the base by a pin passing through the lug on the backing plate fitting into the attachment on the base. |
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The pin type may vary depending on the manufacturer. On this particular type it is a basic screw fitting to secure the attachment in place. | |||
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Screw postThe screw post backing plate attaches to the base by a threaded end of the base arm, this then is screwed into the post by hand and secures the dial indicator in place. |
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The adjustable plate mounting can be used with magnetic bases, when the location and angle of the dial indicator is in a restricted position and small adjustments need to be made using an hexagon key. | |||
