{"id":4454,"date":"2020-07-25T22:28:00","date_gmt":"2020-07-26T01:28:00","guid":{"rendered":"https:\/\/tangopardo.com.ar\/2cf7\/?p=4454"},"modified":"2020-07-28T09:37:15","modified_gmt":"2020-07-28T12:37:15","slug":"shaft-grinding","status":"publish","type":"post","link":"https:\/\/tangopardo.com.ar\/2cf7\/2020\/07\/25\/shaft-grinding","title":{"rendered":"Shaft grinding"},"content":{"rendered":"\n<p>So after <a href=\"https:\/\/tangopardo.com.ar\/2cf7\/2020\/07\/24\/worn-shaft-buildup\">building up all the missing metal<\/a> the next step is turning the shaft back into dimension.<\/p>\n\n\n\n<p>To do this properly a lathe and\/or a special grinder is used. I have neither but the points from <a href=\"https:\/\/tangopardo.com.ar\/2cf7\/2020\/06\/06\/making-a-beam-compass\">that compass<\/a>, a dremel and a bit of ingenuity.<\/p>\n\n\n\n<p>Thus, this is how we create a precision ground shaft in the third world:<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-1 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-attachment-id=\"4457\" data-permalink=\"https:\/\/tangopardo.com.ar\/2cf7\/2020\/07\/25\/shaft-grinding\/grinding-between-centers-third-world-edition\" data-orig-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-scaled.jpg\" data-orig-size=\"2560,1920\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;2&quot;,&quot;credit&quot;:&quot;Adrian Pardini pardo.bsso AT gmail.com - adrian AT tangopardo.com.ar&quot;,&quot;camera&quot;:&quot;Moto E (4) Plus&quot;,&quot;caption&quot;:&quot;Grinding between centers: third world edition&quot;,&quot;created_timestamp&quot;:&quot;1595674393&quot;,&quot;copyright&quot;:&quot;CC BY-SA-NC 2.5 AR Adrian Pardini - pardo.bsso AT gmail.com - adrian AT tangopardo.com.ar&quot;,&quot;focal_length&quot;:&quot;3.5&quot;,&quot;iso&quot;:&quot;397&quot;,&quot;shutter_speed&quot;:&quot;0.010003&quot;,&quot;title&quot;:&quot;Grinding between centers: third world edition&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"Grinding between centers: third world edition\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Grinding between centers: third world edition&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-300x225.jpg\" data-large-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-1024x768.jpg\" src=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-1024x768.jpg\" alt=\"\" data-id=\"4457\" data-full-url=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-scaled.jpg\" data-link=\"https:\/\/tangopardo.com.ar\/2cf7\/?attachment_id=4457\" class=\"wp-image-4457\" srcset=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-1024x768.jpg 1024w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-300x225.jpg 300w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-768x576.jpg 768w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-1536x1152.jpg 1536w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_105313315-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Grinding between centers: third world edition<\/figcaption><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>I did most of the hard work free hand at the bench grinder and then used this contraption and a small stone on the dremel to get it as close as possible to how it is supposed to be. The keyway only needed a small touch with a round burr after filling the walls.<\/p>\n\n\n\n<p>The gear fits nice with just a bit of runout that I hope the rest of the tolerances will mask out.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-1 is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-attachment-id=\"4458\" data-permalink=\"https:\/\/tangopardo.com.ar\/2cf7\/2020\/07\/25\/shaft-grinding\/worn-out-shaft-after-grinding-just-like-new\" data-orig-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-scaled.jpg\" data-orig-size=\"2560,1920\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;2&quot;,&quot;credit&quot;:&quot;Adrian Pardini pardo.bsso AT gmail.com - adrian AT tangopardo.com.ar&quot;,&quot;camera&quot;:&quot;Moto E (4) Plus&quot;,&quot;caption&quot;:&quot;Worn out shaft after grinding, just like new&quot;,&quot;created_timestamp&quot;:&quot;1595675564&quot;,&quot;copyright&quot;:&quot;CC BY-SA-NC 2.5 AR Adrian Pardini - pardo.bsso AT gmail.com - adrian AT tangopardo.com.ar&quot;,&quot;focal_length&quot;:&quot;3.5&quot;,&quot;iso&quot;:&quot;283&quot;,&quot;shutter_speed&quot;:&quot;0.010003&quot;,&quot;title&quot;:&quot;Worn out shaft after grinding, just like new&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"Worn out shaft after grinding, just like new\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Worn out shaft after grinding, just like new&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-300x225.jpg\" data-large-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-1024x768.jpg\" src=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-1024x768.jpg\" alt=\"\" data-id=\"4458\" data-full-url=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-scaled.jpg\" data-link=\"https:\/\/tangopardo.com.ar\/2cf7\/?attachment_id=4458\" class=\"wp-image-4458\" srcset=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-1024x768.jpg 1024w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-300x225.jpg 300w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-768x576.jpg 768w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-1536x1152.jpg 1536w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_111243886-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Worn out shaft after grinding, just like new<\/figcaption><\/figure><\/li><\/ul><\/figure>\n\n\n\n<p>And after putting all back together it&#8217;s running again. I only needed to add a shim between the gear and the bearing to take out a bit of axial play. <\/p>\n\n\n\n<p>When it broke I was almost about to dump it, I had little experience welding and back then it was really cheap. But in spite of how it looks on the outside it has a very sturdy construction (for its price) and a quality needle bearing instead of a plain bushing like the others.<\/p>\n\n\n\n<p>It was a good call, as now I have another working tool.<\/p>\n\n\n\n<figure class=\"wp-block-gallery columns-1 is-cropped wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\"><ul class=\"blocks-gallery-grid\"><li class=\"blocks-gallery-item\"><figure><a href=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" data-attachment-id=\"4459\" data-permalink=\"https:\/\/tangopardo.com.ar\/2cf7\/2020\/07\/25\/shaft-grinding\/angle-grinder-fixed\" data-orig-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-scaled.jpg\" data-orig-size=\"2560,1920\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;2&quot;,&quot;credit&quot;:&quot;Adrian Pardini pardo.bsso AT gmail.com - adrian AT tangopardo.com.ar&quot;,&quot;camera&quot;:&quot;Moto E (4) Plus&quot;,&quot;caption&quot;:&quot;Angle grinder: fixed&quot;,&quot;created_timestamp&quot;:&quot;1595678196&quot;,&quot;copyright&quot;:&quot;CC BY-SA-NC 2.5 AR Adrian Pardini - pardo.bsso AT gmail.com - adrian AT tangopardo.com.ar&quot;,&quot;focal_length&quot;:&quot;3.5&quot;,&quot;iso&quot;:&quot;179&quot;,&quot;shutter_speed&quot;:&quot;0.010003&quot;,&quot;title&quot;:&quot;Angle grinder: fixed&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"Angle grinder: fixed\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Angle grinder: fixed&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-300x225.jpg\" data-large-file=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-1024x768.jpg\" src=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-1024x768.jpg\" alt=\"\" data-id=\"4459\" data-full-url=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-scaled.jpg\" data-link=\"https:\/\/tangopardo.com.ar\/2cf7\/?attachment_id=4459\" class=\"wp-image-4459\" srcset=\"https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-1024x768.jpg 1024w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-300x225.jpg 300w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-768x576.jpg 768w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-1536x1152.jpg 1536w, https:\/\/tangopardo.com.ar\/2cf7\/wp-content\/uploads\/2020\/07\/IMG_20200725_115636013-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"blocks-gallery-item__caption\">Angle grinder: fixed<\/figcaption><\/figure><\/li><\/ul><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>So after building up all the missing metal the next step is turning the shaft back into dimension. To do this properly a lathe and\/or a special grinder is used. I have neither but the points from that compass, a dremel and a bit of ingenuity. Thus, this is how we create a precision ground [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[24,111,93],"tags":[],"class_list":["post-4454","post","type-post","status-publish","format-standard","hentry","category-hacks","category-one-night-builds","category-welding-metalworking"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pmnbC-19Q","_links":{"self":[{"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/posts\/4454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/comments?post=4454"}],"version-history":[{"count":4,"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/posts\/4454\/revisions"}],"predecessor-version":[{"id":4463,"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/posts\/4454\/revisions\/4463"}],"wp:attachment":[{"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/media?parent=4454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/categories?post=4454"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tangopardo.com.ar\/2cf7\/wp-json\/wp\/v2\/tags?post=4454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}