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techtalk:ref:tools109 [2019/05/28 15:41]
hippysmack [Telescoping Bore Gauge (snap gauge)]
techtalk:ref:tools109 [2019/08/01 23:19] (current)
hippysmack [Telescoping Bore Gauge (snap gauge)]
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 Each arm snaps toward opposing sides in the bore (hence the slang 'snap gauge'​). \\ Each arm snaps toward opposing sides in the bore (hence the slang 'snap gauge'​). \\
 The arms are rounded on the ends and they will self center in the bore. \\ The arms are rounded on the ends and they will self center in the bore. \\
 +They usually come in a kit. This one's from Harbor Freight and works great. \\
 +The ends are curved as to not catch a corner or thickness of a flat end as in a caliper. \\
 +{{:​techtalk:​ref:​tools:​telescoping_bore_gauge_kit_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack)) {{:​techtalk:​ref:​tools:​telescoping_bore_gauge_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack))
 +
   * The measurement is found by forward and backward movement in the bore with the gauge loose and with a slight drag.   * The measurement is found by forward and backward movement in the bore with the gauge loose and with a slight drag.
   * When you feel you are at the correct distance, (pulling straight in the bore with a slight drag on the tool), tighten the nut to keep that arm length.   * When you feel you are at the correct distance, (pulling straight in the bore with a slight drag on the tool), tighten the nut to keep that arm length.
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   * Evo cylinders will naturally not be perfectly (a few thousandths variance in circumference). \\ To measure cylinder bore, the heads have to be off which releases the torque on the cylinder and distorts the bore.   * Evo cylinders will naturally not be perfectly (a few thousandths variance in circumference). \\ To measure cylinder bore, the heads have to be off which releases the torque on the cylinder and distorts the bore.
  
 +|{{:​techtalk:​ref:​tools:​measuring_the_circumference_1_by_hippysmack.jpg?​direct&​300|}}|{{:​techtalk:​ref:​tools:​measuring_the_circumference_2_by_hippysmack.jpg?​direct&​300|}}|
 +|Measure around the circumference for accurate readings. \\ One measurement will most likely not give an accurate description of the bore. ((photos by Hippysmack))||
  
 |{{:​techtalk:​ref:​tools:​measuring_cylinder_1_by_horseman1.jpg?​direct&​300|}}|{{:​techtalk:​ref:​tools:​measuring_cylinder_2_by_horseman1.jpg?​direct&​300|}}| |{{:​techtalk:​ref:​tools:​measuring_cylinder_1_by_horseman1.jpg?​direct&​300|}}|{{:​techtalk:​ref:​tools:​measuring_cylinder_2_by_horseman1.jpg?​direct&​300|}}|