Differences

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--- techtalk:ref:tools109 [2018/05/21 07:51]
ixl2relax [REF: Tools - Sub-009]
+++ techtalk:ref:tools109 [2024/01/23 03:49] (current)
hippysmack
@@ Line 7: / Line 7: @@
     * If you have determined 'zero' needs to be re-set on standard dial or electronic calipers, make sure the jaws are clean and are pressed against each other. For manual calipers, loosen the screw holding the faceplate and turn the face to zero, tighten and then snap it back several times to make sure it zeros every time. For digital calipers the procedure is the same except when ready you simply press the 'zero' button. Verniers have no faceplate to re-set.
-|{{techtalk:ref:tools:gear_driven_manual_caliper.jpg?direct&300|}}|{{techtalk:ref:tools:vernier_caliper.jpg?direct&300|}}|{{techtalk:ref:tools:digital_calipers_by_screw_loose_dan.jpg?direct&300|}}|
+|{{techtalk:ref:tools:gear_driven_manual_caliper.jpg?direct&300|}}|{{techtalk:ref:tools:vernier_caliper.jpg?direct&300|}}|{{:techtalk:ref:tools:dial_caliper_2_by_reddtigger.jpg?direct&300|}}|
-|  Gear driven manual dial caliper ((photo by Hippysmack))  |  Vernier slide caliper ((photo by Hippysmack))  |  Digital Caliper (( photo by Screw Loose Dan http://xlforum.net/forums/showthread.php?t=1803692&page=21))  |
+|  Gear driven manual dial caliper ((photo by Hippysmack))  |  Vernier slide caliper ((photo by Hippysmack))  |  Dial Caliper with inches and millimeters ((photo by ReddTigger of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/187159-time-sert-cylinder-stud-repair/page5?t=1999530&page=5))  |
+|{{techtalk:ref:tools:digital_calipers_by_screw_loose_dan.jpg?direct&300|}}|
+|  Digital Caliper (( photo by Screw Loose Dan https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/168013-screw-loose-s-repairs/page21?t=1803692&page=21))  |
-===== Reading a caliper =====
+===== Reading a Caliper =====
   * Open the caliper slightly larger than the piece your measuring, hold the piece against one jaw while pulling the other jaw against your piece. Slightly snug the jaws to the piece and record a reading. Repeat this several times to insure you have a true reading while snapping jaws back to zero before opening them up again.
   * **Reading Verniers**: In the left pic below, a measurement was taken at 10.770". Read the numbers on the slide rule and add the numbers in the window (which on this model amounts to one thousandth each). As you can see, your watching for the number that matches up with the correct line between the window and the slide rule. The sum of 2 initial readings taken reveals the final reading on this type of caliper. Check the gradients before using to verify (IE metric vs U.S.). In the left pic below, 10.50" is the closest accurate reading on the slide rule and 0.020" from the window equals 10.770". Verniers can be used for inside or outside measurements. Outside measurements are taken between the jaws and inside measurements are taken from the outside edge of each jaw. The slide rule gradients are different on each side to accurately show the readings for each choice measurement taken. Notice above the right pic below showing the words 'outside'. The opposite side is marked 'inside'.
@@ Line 18: / Line 20: @@
 |  10.770" reading on a vernier caliper  |  4.915" reading on a vernier caliper  |
-====== Dial Depth Gauge ======
+===== Telescoping Bore Gauge (snap gauge) =====
+For measuring internal diameters / round holes (cylinders, bushings or other), snap gauges are used in the bore I.D. \\
+The top end of the tool tightens the bottom arms in whatever length they are at the time. \\
+Typical use is to loosen the shaft nut on top, close the arms, tighten the nut, insert the tool in the bore and loosen the nut. \\
+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. \\
+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.
+  * 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.
+  * Before removing the tool from the bore, continue the movements to make sure you still have the same drag as you did before tightening the tool. \\ Then remove the gauge tool from the bore.
+  * Next, use a caliper to measure the length of the gauge arms to find the internal diameter reading. \\
+  * Take several measurements instead of just one and at different points around the bore to check for equal roundness.
+It takes practice and patience to get used to using this tool. \\
+One measurement is usually not enough to say that you have a good reading from it. \\
+Lots of factors are involved in getting the correct measurement with it also.
+  * Snap gauges are notorious for closing in (slightly) when the nut is tightened. This will give you a bad reading. \\ You should feel a slight drag in the bore with the arms loose and the same when tightened. \\ Continue with the forward and back motion until you feel like the tool is perpendicular to the bore (with a slight drag). \\ Then tighten the nut and double check that you still have drag on the tool BEFORE removing it from the bore.
+  * It's also easy to turn the tool sideways (even slightly) and feel drag. \\ Then while double checking the distance when tightened, you get even more drag. \\ Since a sideways measurement is longer than a straight thru measurement, this will give you a bad reading.
+  * 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|}}|
+|  Telescoping bore gauge and caliper for measuring cylinder I/D. ((photos by Horseman1 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/180632-59-new-owner/page7?t=1943121&page=7))  ||
+|{{:techtalk:ref:tools:measuring_cam_bushings_1_by_aussiegazza.jpg?direct&300|}}|{{:techtalk:ref:tools:measuring_cam_bushings_2_by_aussiegazza.jpg?direct&300|}}|{{:techtalk:ref:tools:measuring_cam_bushings_3_by_aussiegazza.jpg?direct&300|}}|
+|  Telescoping bore gauge and caliper for measuring cam bushinhgs. ((photos by AussieGazza of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-engine-conversions/87710-aussiegazzas-rebuild/page5?t=692835&page=5))  |||
+====== Dial Indicators ======
+(From time to time, you can spot check dial indicator accuracy with a feeler gauge). ((DirtyCory of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/127032-getting-this-78-back-to-the-way-it-should-be/page8?t=1297584&page=8))
+===== Dial Depth Gauge =====
 **Application**
@@ Line 35: / Line 73: @@
   * Set the gauge on a clean machined surface or mirror, hold it firmly, loosen the faceplate thumbscrew, turn the faceplate gradients to read '0' and tighten the faceplate thumbscrew. At this point, all measurements will be taken from a 'known base-point' which you just established (0). Place the base on a clean flat surface with the probe hanging off that surface in the middle towards the target. Target is measured as it's distance away from the base as the probe is lowered.
-====== For Finding Piston Top Dead Center (TDC) ======
-===== With the Head On: =====
-==== Using a Straw ====
-  * You can use a straw through the spark plug hole to measure when the piston is close to TDC with the rocker box on or off. When done, it can only be regarded as an approximate setting however. The piston is only at TDC once for a very short length of time until the rod rolls back over to the down-stroke.  It is difficult if near impossible to set exact TDC with a straw. But, unless you are creating a new timing mark or finely setting cam or ignition timing, this is an easy way to accomplish TDC.
-  * The straw is soft enough that you won't risk breaking anything if it gets squished between the piston and the head.
-  * For best results, hold the straw loosely while picking up on it periodically to keep it from getting stuck (which will affect your measurements).
-  * Using a straw with the engine assembled:
-    * This is best handled with the bike on a lift (or at least the rear tire off the ground) and the transmission in the highest gear while rotating the rear tire in the forward direction.
-  * Using a straw with the primary and / or gearcase cover(s) off:
-    * The rear tire doesn't have to be lifted as you can put the transmission in neutral and turn the engine over with the shaft nut on either side.
-  * It's also best done with two people (one turning the rear tire and one manning the straw). However, it can be done by one person watching the straw rise with the piston and then switching to one hand on the straw and the other nudging the rear tire to feel when the straw goes down.
-  * **Caution**: Turning the rear tire while the transmission is engaged will produce up and down movement of the entire bike, make sure it is tied down and secured before attempting to rotate the tire.
-|Straw in plug hole for single or dual plug heads ((photo by Hippysmack))|Alternative location with dual plug heads ((photo by Hippysmack))|
-|{{techtalk:ref:tools:tdc_with_straw_-_single_or_dual_plug_heads_by_hippysmack.jpg?direct&300|}}|{{techtalk:ref:tools:tdc_with_straw_1_by_hippysmack.jpg?direct&300|}}|
-===== With the Head Off =====
-==== Using a Dial Depth Gauge ====
-|Loosen the thumbscrew to allow you to turn the face \\ (with a slight drag) ((photo by Hippysmack))|Place on a flat clean machined surface or a mirror, \\ turn the face to read "zero", lock the thumbscrew. ((photo by Hippysmack))|Set the base edges on the flats of the deck and drop \\ the center probe on the piston to measure \\ 'differential' from zero while turning the engine \\ to find TDC ((photo by Hippysmack))|
-|{{techtalk:ref:tools:dial_depth_gauge_3_by_hippysmack.jpg?direct&300|}}|{{techtalk:ref:tools:dial_depth_gauge_4_by_hippysmack.jpg?direct&300|}}|{{techtalk:ref:tools:dial_depth_gauge_5_by_hippysmack.jpg?direct&300|}}|
-|:::|Double check the reading before proceeding|Double check the reading before proceeding|
 \\

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