If the amount of wear is beyond the limit, have the crankshaft grind and A install undersize bearings. However, if B B the amount of wear is within the limit, you can correct the wear using an oil stone or oiled grinding paper of fine B B grain size.
(Be sure to use grinding paper which has been immersed in A oil.) EFM2047I * Undersize bearings available Standard 0.25 (Inside diameter is 0.25 mm lesser than the standard size.) 0.50 (Inside diameter is 0.50 mm lesser than the standard size.) 0.75 (Inside diameter is 0.75 mm lesser than the standard size.) 1.00 (Inside diameter is 1.00 mm lesser than the standard size.) Undersize bearings are available in 4 different sizes as indicated above, and the crankshaft can be reground to the above sizes. NOTE : When regrinding the crankshaft as described below, the fillet section ‘R’ should be finished correctly. Avoid " R " sharp corners or insufficient fillet.
" R " * Standard values of ‘R’ 0 1 Crankshaft Pin ‘R’ : 5 -0.2 " R " " R " " R " 0 2 Crankshaft journal ‘R’: 5 -0.2 3) Crankshaft run-out Support the crankshaft on V blocks. Turn the crankshaft with a dial indica- tor placed on the surface plate and take the amount of crankshaft run-out. - 69 - INSPECTION AND MEASUREMENT Standard Limit Journal diameter N95.966 ~ N95.988 N94.966 mm Pin diameter N82.966 ~ N82.988 N81.966 mm N정or상mal P불o량or 불Po량or EEFFMM22004488II Standard Limit 0.1 mm 0.15 mm