{"id":1727,"date":"2021-09-17T08:16:55","date_gmt":"2021-09-17T08:16:55","guid":{"rendered":"https:\/\/www.sifcoasc.com\/?p=1727"},"modified":"2023-01-25T11:06:31","modified_gmt":"2023-01-25T11:06:31","slug":"repairing-a-damaged-pinion-gear-with-selective-electroplating","status":"publish","type":"post","link":"https:\/\/www.sifcoasc.com\/enuk\/blog\/repairing-a-damaged-pinion-gear-with-selective-electroplating","title":{"rendered":"Repairing a Damaged Pinion Gear with Selective Electroplating"},"content":{"rendered":"
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Repairing a damaged pinion gear with Selective Electroplating<\/strong><\/p>\n

Working with large gear manufacture and repair specialists Horsburgh & Scott Co., SIFCO ASC\u2019s brush plating solutions were used to repair two defects on the 16\u201d diameter by 5\u201d long bearing journal of this gear. They were caused by a seized bearing which damaged the seat and also created a gouge during the removal of the bearing.<\/p>\n

The first defect was a 0.030\u201d deep gouge measuring 0.75\u2033 wide and 12\u2033 long, while the bearing seat was 0.012\u2033 undersized after clean-up.<\/p>\n

This was considered a good selective plating application because the groove was relatively shallow and could be quickly filled with copper using a 100% tool contact. The undersized condition required only 0.006\u201d thickness of nickel.<\/p>\n

Welding to fill the defect was rejected as an option due to the heat and associated structural changes in the metal associated with the welding process. Meanwhile machining the entire diameter to remove the defect would have made the diameter 0.060\u201d undersize, and so this was ruled out as well, as it would have made the journal too impractical for plating at such a high thickness.<\/p>\n

For the resize deposit, the part required a deposit of approximately 30 Rockwell hardness. Nickel was chosen to meet that requirement.<\/p>\n

First, the gouge was selectively filled with copper to bring it back to the overall OD. The bearing journal was first plated with 0.001\u2033 thickness of copper and then masked for the defect repair. A plating anode was used to cover the full length of the gouge which shortened the plating time. The defect was filled with three layers of copper and hand finished between layers. The final layer was dressed flush with the OD.<\/p>\n

Once the gouge defect was repaired, the entire OD was brought back to size by plating with 0.006\u201d thickness of nickel. After the repair of the two defects, the journal was as good as new and ready to receive a new bearing, making the excavator ready for action once again.<\/p>\n","protected":false},"excerpt":{"rendered":"

Repairing a damaged pinion gear with Selective Electroplating Working with large gear manufacture and repair specialists Horsburgh & Scott Co., SIFCO ASC\u2019s brush plating solutions were used to repair two defects on the 16\u201d diameter by 5\u201d long bearing journal of this gear. They were caused by a seized bearing which damaged the seat and […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1727","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"yoast_head":"\nRepairing a Damaged Pinion Gear with Selective Electroplating - SIFCO Applied Surface Concepts<\/title>\n<meta name=\"description\" content=\"Repairing a damaged pinion gear with Selective Electroplating Working with large gear manufacture and repair specialists Horsburgh and Scott Co., SIFCO ASC\u2019s brush plating solutions were used to repair two defects on the 16\u201d diameter by 5\u201d long bearing journal of this gear. They were caused by a seized bearing which damaged the seat\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sifcoasc.com\/enuk\/blog\/repairing-a-damaged-pinion-gear-with-selective-electroplating\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Repairing a Damaged Pinion Gear with Selective Electroplating - SIFCO Applied Surface Concepts\" \/>\n<meta property=\"og:description\" content=\"Repairing a damaged pinion gear with Selective Electroplating Working with large gear manufacture and repair specialists Horsburgh and Scott Co., SIFCO ASC\u2019s brush plating solutions were used to repair two defects on the 16\u201d diameter by 5\u201d long bearing journal of this gear. They were caused by a seized bearing which damaged the seat\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sifcoasc.com\/enuk\/blog\/repairing-a-damaged-pinion-gear-with-selective-electroplating\" \/>\n<meta property=\"og:site_name\" content=\"SIFCO Applied Surface Concepts\" \/>\n<meta property=\"article:published_time\" content=\"2021-09-17T08:16:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-01-25T11:06:31+00:00\" \/>\n<meta name=\"author\" content=\"tmswebsiteadmin\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"tmswebsiteadmin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.sifcoasc.com\\\/enuk\\\/blog\\\/repairing-a-damaged-pinion-gear-with-selective-electroplating#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sifcoasc.com\\\/enuk\\\/blog\\\/repairing-a-damaged-pinion-gear-with-selective-electroplating\"},\"author\":{\"name\":\"tmswebsiteadmin\",\"@id\":\"https:\\\/\\\/www.sifcoasc.com\\\/enuk#\\\/schema\\\/person\\\/1018d572c44e775c01be65b3996f3cea\"},\"headline\":\"Repairing a Damaged Pinion Gear with Selective Electroplating\",\"datePublished\":\"2021-09-17T08:16:55+00:00\",\"dateModified\":\"2023-01-25T11:06:31+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.sifcoasc.com\\\/enuk\\\/blog\\\/repairing-a-damaged-pinion-gear-with-selective-electroplating\"},\"wordCount\":331,\"commentCount\":0,\"inLanguage\":\"en-UK\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.sifcoasc.com\\\/enuk\\\/blog\\\/repairing-a-damaged-pinion-gear-with-selective-electroplating\",\"url\":\"https:\\\/\\\/www.sifcoasc.com\\\/enuk\\\/blog\\\/repairing-a-damaged-pinion-gear-with-selective-electroplating\",\"name\":\"Repairing a Damaged Pinion Gear with Selective Electroplating - SIFCO Applied Surface Concepts\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.sifcoasc.com\\\/enuk#website\"},\"datePublished\":\"2021-09-17T08:16:55+00:00\",\"dateModified\":\"2023-01-25T11:06:31+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.sifcoasc.com\\\/enuk#\\\/schema\\\/person\\\/1018d572c44e775c01be65b3996f3cea\"},\"description\":\"Repairing a damaged pinion gear with Selective Electroplating Working with large gear manufacture and repair specialists Horsburgh and Scott Co., SIFCO ASC\u2019s brush plating solutions were used to repair two defects on the 16\u201d diameter by 5\u201d long bearing journal of this gear. 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