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Feeler gauge

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feeler gauge

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Feeler gauge

  1. 1. ►A feeler gauge is a tool used to measure gap widths. Feeler gauges are mostly used in engineering to measure the clearance between two parts. ►They consist of a number of small lengths of steel of different thicknesses with measurements marked on each piece. ► They are flexible enough that, even if they are all on the same hinge, several can be stacked together to gauge intermediate values. ► It is common to have two sets for imperial units (typically measured in thousandths of an inch) and metric (typically measured in hundredths of a millimeter) measurements. ►The lengths of steel are sometimes called leaves or blades, although they have no sharp edge. FEELER GAUGE
  2. 2. SALLAN KHAN
  3. 3. SALLAN KHAN
  4. 4. ► Straight leaves may also be referred to as parallel leaves. The sides are parallel all the way from the locking screw to the tip. ► The leaves have smooth rounded edges for comfort and safety when handling. STRAIGHT LEAF FEELER GAUGE
  5. 5. TAPERED LEAF FEELER GAUGE ► Tapered leaves gradually narrow towards the tip. They tend to be shorter than straight leaves. ► The leaves have smooth rounded edges for comfort and safety when handling
  6. 6. GO NOGO FEELER GAUGE ► A Go NoGo feeler gauge is different to a regular feeler gauge as it differentiates between a thick base and a thinner tip. ► The thinner end of the gauge is able to 'go' into the gap and the thicker body will not - 'no go'.
  7. 7. IMPERIAL FEELER GAUGE ► An imperial gauge gives measurements in thousandths of an inch
  8. 8. METRIC FEELER GAUGE ► A metric gauge gives measurements in hundredths of a millimeter.
  9. 9. COMBINED IMPERIAL AND METRIC FEELER GAUGE ► Some feeler gauges combine both imperial and metric measurements. ► The measurements are often found on separate leaves at alternate ends of the tool. They can sometimes be found on the reverse side of the same leaf.
  10. 10. OFFSET BLADES ► Offset blades are bent toward the tip for easier access in most motor vehicle applications and work in restrictive areas
  11. 11. SALLAN KHAN
  12. 12. SALLAN KHAN INSERT FEELER GAUGE ► Firstly rotate the inner or outer ring a few times, making sure that both bearing rings and the roller are aligned in respect to each other. ► Insert the feeler gauge as shown, between bearings and casing.
  13. 13. SALLAN KHAN MOVE BLADE BACK AND FORTH ► Move the blade back and forth until it can be inserted to the middle of the roller. ► Check the bearing clearance against specification before mounting
  14. 14. SALLAN KHAN TAKE ANOTHER MEASUREMENT ► Take another feeler gauge measurement after mounting the bearing onto the shaft. There may be variances between the two measurements.
  15. 15. SALLAN KHAN TAKE ADDITIONAL READINGS ► To find the 'true' bearing clearance, take a further 3 feeler gauge readings at locations: a (9 o'clock), b (3 o'clock) and c (12 o'clock) as shown.
  16. 16. SALLAN KHAN
  17. 17. SALLAN KHAN ► Feeler gauges should be cleaned with an oily cloth before storage to prevent rust.
  18. 18. SALLAN KHAN ►Immediately after use, close fanned out feeler gauge blades. ► This should be done by grouping smaller blades against the consecutively larger sizes for support. ►This will prevent the thinner blades bending when they are closed into the case.
  19. 19. SALLAN KHAN ►Immediately after use, close fanned out feeler gauge blades. This should be done by grouping smaller blades against the consecutively larger sizes for support. ►This will prevent the thinner blades bending when they are closed into the case

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