{"id":7,"date":"2011-10-02T09:01:04","date_gmt":"2011-10-02T14:01:04","guid":{"rendered":"http:\/\/www.wentztech.com\/blog\/?page_id=7"},"modified":"2020-06-03T14:50:05","modified_gmt":"2020-06-03T19:50:05","slug":"clausing-8520-mill","status":"publish","type":"page","link":"https:\/\/www.wentztech.com\/metalworking\/equipment\/clausing-8520-mill\/","title":{"rendered":"Clausing 8520 Mill"},"content":{"rendered":"<p style=\"text-align: center;\"><strong>Technical Reference on the Clausing 8520 \/ 8530 Mill<\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>The Clausing 8520 is a highly sought-after small knee mill due to its versatility and light weight. I can be broken down into lighter pieces and easily moved, even up or down stairs. This makes it ideal for the home shop.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" width=\"521\" height=\"528\" class=\"aligncenter size-full wp-image-13\" title=\"Clausing_8520_Cover\" src=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Clausing_8520_Cover.png\" alt=\"\" srcset=\"https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Clausing_8520_Cover.png 521w, https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Clausing_8520_Cover-296x300.png 296w\" sizes=\"auto, (max-width: 521px) 100vw, 521px\" \/><\/p>\n<p style=\"text-align: left;\"><strong>History:<\/strong><\/p>\n<p>The 8520 was main mass-produced model of this mill.<\/p>\n<p>The 8520 and the later 8530 both came with a Morse Taper 2 nose spindle. There were also models\u00a08525 and\u00a0 8535 that contained a Brown and Sharp #7 taper spindle.<\/p>\n<p>The Morse Taper 2 spindle is much more desirable due to the lack of availability of the B&amp;S #7 tooling.<\/p>\n<p style=\"text-align: left;\">The mill was offered in many other variants during its life:<\/p>\n<ul>\n<li style=\"text-align: left;\">Model 8512 that was sold without a head, or custom configured to other applications<\/li>\n<li style=\"text-align: left;\">A model was offered fitted with a Bridgeport M head<\/li>\n<li style=\"text-align: left;\">Some early models left the factory with only hand wheels on the right side of the table.<\/li>\n<li style=\"text-align: left;\">Some early models have been reported painted in tan instead of the customary gray.<\/li>\n<\/ul>\n<p style=\"text-align: center;\"><a href=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Clausing_Mhead.png\"><img loading=\"lazy\" decoding=\"async\" width=\"155\" height=\"300\" class=\"size-medium wp-image-16 aligncenter\" title=\"Clausing_Mhead\" src=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Clausing_Mhead-155x300.png\" alt=\"\" srcset=\"https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Clausing_Mhead-155x300.png 155w, https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Clausing_Mhead.png 203w\" sizes=\"auto, (max-width: 155px) 100vw, 155px\" \/><\/a><\/p>\n<p>If you are interested in more history on these machines head on over to Tony Griffiths wonderful site. There you will find a treasure trove of\u00a0 historical information on many machines besides the Clausing mill.\u00a0<a href=\"http:\/\/www.lathes.co.uk\/clausing%20vertical\/\">The 8520 page is available here.<\/a><\/p>\n<p>There are some other pages on the net with information on this milling machine.<\/p>\n<ul>\n<li><span class=\"Apple-style-span\" style=\"font-family: Georgia, 'Bitstream Charter', serif; font-weight: normal;\">There is a IO group that covers Clausing.\u00a0<a href=\"http:\/\/groups.yahoo.com\/group\/clausing_lathe_and_mill\/\">here<\/a><\/span><\/li>\n<li><\/li>\n<li><span class=\"Apple-style-span\" style=\"font-family: Georgia, 'Bitstream Charter', serif; font-weight: normal;\">Igor Chudov 8530 has pages of photos \u00a0<a href=\"http:\/\/www.chudov.com\/projects\/clausing\/01-home\/\">1<\/a> <a href=\"http:\/\/www.chudov.com\/projects\/clausing\/02-cleaned\/\">2<\/a> <a href=\"http:\/\/igor.chudov.com\/tmp\/packing\/clausing\/\">3<\/a><\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h1><strong>Parts and Tooling:<\/strong><\/h1>\n<p>Some parts and manuals for this mill are still available from Clausing.<\/p>\n<p>Clausing contract information:<\/p>\n<blockquote><p><a href=\"http:\/\/www.clausing-industrial.com\/\">Clausing Service Center<\/a><\/p>\n<p>811 Eisenhower Drive South\u00a0Goshen, IN 46526<\/p>\n<p>Phone: 800-535-6553<\/p><\/blockquote>\n<p>&nbsp;<\/p>\n<p>My archive of documentation<\/p>\n<ul>\n<li><a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/Clausing%208520%20Instructions%20Parts.pdf\">Owners Manual and Parts Diagram<\/a><\/li>\n<li><a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/8520%20Sales%20brochure.pdf\">Sales Brochure<\/a><\/li>\n<li><a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/Clausing%208520%20Vertical%20Milling%20Machine%20Catalog.pdf\">Color Catalog showing available options<\/a><\/li>\n<li><a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/Clausing%208520%20Blank%20Test%20Report.pdf\">Blank Test Report<\/a><\/li>\n<li><a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/Clausing%208520%20Blank%20Test%20Report.pdf\">8635 Power Feed Manual<\/a><\/li>\n<li><a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/Clausing%208630%20Manual.pdf\">8630 Measuring Attachment Manual<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h1>Tooling:<\/h1>\n<p style=\"padding-left: 30px;\">New Morse Taper 2 tooling is readily available, due to some of the newer import milling machines also taking MT2 tooling. Depending on your draw bar configuration (See Below) all the tooling should be 3\/8-16 threaded.<\/p>\n<p style=\"padding-left: 30px;\">Besides eBay I have purchased tooling from the following.<\/p>\n<ul>\n<li><a href=\"http:\/\/www.littlemachineshop.com\/\" target=\"_blank\" rel=\"external noopener\">LittleMachineShop.com<\/a>\u00a0has lots of MT2 tooling and arbors available.<\/li>\n<li><a href=\"http:\/\/www.cdcotools.com\/\" target=\"_blank\" rel=\"external noopener\">CDCO<\/a>\u00a0Machinery also has some MT2 tooling.<\/li>\n<\/ul>\n<p style=\"padding-left: 30px;\">One of the questions that come up from time to time is what size vice and what size rotary table works best on the mill. I have a Enco\u00a0Model #425-7240 vise without the swivel base that I purchased which is a good fit for the mill.<\/p>\n<p style=\"padding-left: 30px; text-align: center;\"><a href=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Enco-Vise.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"250\" height=\"174\" class=\"size-full wp-image-29 aligncenter\" title=\"Enco Vise\" src=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/Enco-Vise.jpg\" alt=\"\" \/><\/a>\u00a0I have a small 4 inch rotary table, but a 6 inch fits nicly also. A 8 inch is really too big for the table.<\/p>\n<h1>\u00a0DRO<\/h1>\n<p style=\"padding-left: 30px;\">I have installed a DRO on my mill.<\/p>\n<p style=\"padding-left: 30px;\"><a title=\"Clausing 8520 DRO Install\" href=\"http:\/\/www.wentztech.com\/metalworking\/2011\/10\/12\/clausing-8520-dro-install\/\">More info on my DRO install.<\/a><\/p>\n<h1>Replacement Belts<\/h1>\n<p style=\"padding-left: 30px;\">The Mill uses standard automotive type 4L belts.<br \/>\nPart Numbers are 4L-220 and 4L-480<\/p>\n<h1>\u00a0T-Nuts<\/h1>\n<p style=\"padding-left: 30px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">The mill table uses 9\/16 T nuts.<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">I find that the 1\/2 inch T Nuts work fine also.<\/span><\/p>\n<h1>Drawbar<\/h1>\n<p style=\"padding-left: 30px;\">Over the life of the 8520, there have apparently been several variations on the drawbar design. The earliest ones had a ring brazed onto the 3\/8-16 drawbar, which fit under a large knurled nut on the top of the spindle. The end of the drawbar was ground 1\/4 inch square. A supplied small right-angle wrench to loosen or tighten the drawbar was provided. The ring would either push or pull, so you could eject the collet by simply loosening the turning the drawbar. This is a nice set up and saves the need to use a hammer to eject the tooling. My mill has this set up, but was missing the wrench.\u00a0 It&#8217;s an easy project to make one. I built mine from a 1\/4 inch socket and a 1\/4 inch hex wrench, works great! (See my\u00a0<a title=\"Projects:Drawbar Wrench For Clausing Mill\" href=\"http:\/\/www.wentztech.com\/metalworking\/Projects\/files\/drawbar.html\" rel=\"self\">projects<\/a>\u00a0page)<\/p>\n<p style=\"padding-left: 30px;\">Later drawbars used two nuts on the top of the drawbar, still leaving the big knurled nut on top of the spindle. This required the use of a brass hammer to dislodge collets.<\/p>\n<p style=\"padding-left: 30px;\">The last batch of machines they made didn&#8217;t have threads on the top of the quill for the knurled nut, the bottom nut on the drawbar rode directly on the top of the spindle. You still have to use a brass hammer on these.<\/p>\n<h1>Restoration Information<\/h1>\n<p>Much of the following information I have collected from other sites, forum postings or e-mails with fellow 8520 owners.<\/p>\n<h1 style=\"padding-left: 30px;\"><span class=\"Apple-style-span\" style=\"white-space: pre;\">Reported Paint Color Matches<\/span><\/h1>\n<p style=\"padding-left: 60px;\">One user found this was a match on his mid-60&#8217;s 8520.<\/p>\n<p style=\"padding-left: 60px;\">The paint was color matched by a local paint dealer to a small part that I brought in to the store.<\/p>\n<p style=\"padding-left: 60px;\">Benjamin Moore paint, labeled &#8220;Urethane Alkyd Gloss Enamel Base 4 M22 4A&#8221;<br \/>\nThe color code is:<br \/>\nRO-1<br \/>\nTG-20<br \/>\nBK-6&#215;2<br \/>\nOY-3&#215;27<\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Another user color matched the paint on his mill and found\u00a0<\/span><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Benjamin Moore &amp; Co., Urethane Alkyd Gloss Enamel\u00a0<\/span><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">&#8220;1567 Night Train&#8221;<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">They use a Deep Base M22 3B to start with, and then add the following tints.\u00a0<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">UTC Gallon Formula:<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">OY 0x21.00<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">BK 1&#215;28.00<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">TG 0x10.00<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">WH 1&#215;4.00<\/span><\/p>\n<h1 style=\"padding-left: 30px;\">Quill<\/h1>\n<p style=\"padding-left: 60px;\"><strong>Quill Drive Plate\u00a0<\/strong><strong>Spring Plungers:<\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Apparently not all mills came from the factory with these installed. Some mills have been reported to have nylon plungers installed instead of the brass. The plungers are adjusted for quiet running and for added drag to hold the quill from dropping easily.\u00a0<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">These are 1\/4-20 screws 180 deg apart drilled\/tapped into the plate edge.<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">The brass\/nylon plungers bear on the high parts of two splines.<\/span><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">\u00a0If you mill does not have them its an easy job to add them.<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">\u00a0<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Each hole is directly opposite from the other (on diameter).<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Drill thru 13\/64 dia (oversize) to the center, centered on the edge of the drive plate disc.\u00a0<\/span><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">The holes are also centered on a gullet of the drive plate spline.<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Tap the hole 1\/4-20 about 1&#8243; deep. Make a brass plug to be a slip fit in the hole 3\/8&#8243; length. \u00a0<\/span><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Fit a coil compression spring (.028 dia wire x .26 long x 3\/16 dia) to sit on the plug.\u00a0<\/span><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Adjust the set screws to compress the spring and push the plug onto the spline.<\/span><\/p>\n<h1 style=\"padding-left: 30px;\">Lead Screws<\/h1>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">David Shaw&#8217;s Site (No longer available), <\/span><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Had an article on replacing the leadscrew with standard 3\/4 inch acme rod.<\/span><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">(<\/span><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\"><a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/Leadscrew%20Replacement.pdf\">PDF copy of David Shaw&#8217;s article.)<\/a><\/span><\/p>\n<h1 style=\"padding-left: 30px;\">Gears<\/h1>\n<p style=\"padding-left: 60px;\">The gears in the quill can easily be broken. Here are some notes I collected on replacement gears:<\/p>\n<p style=\"padding-left: 60px;\">One owner found one of the gears in his mill was marked Boston Gear S-3232.<br \/>\nTheir online catalog shows this to be a 32 DP 14.5 degree PA 32 tooth<\/p>\n<p style=\"padding-left: 60px;\">The last pinion that drives the last gear that slides on the spline is 24 DP instead of 32 DP.<\/p>\n<p style=\"padding-left: 60px;\">It turns out that the small spur gear portion of the 8520 compound gear (Clausing part 990-065 &#8211; cost $66) is a close match to McMaster-Carr part no. 6325 K31. Cost $7.79. A bit of cutting to get the hub thickness down to 1\/4 inch, some finish sanding and reassembly using 1\/4&#8243; dia. cold rolled stock as a shaft and a broken length of 1\/16&#8243; drill bit as a pin to lock the two gears &#8211; and everything works. Whole job took about an hour and a half.<\/p>\n<p style=\"padding-left: 60px;\">When I purchased my mill the gears seemed a little crunchy. It turned out that they were just dirty with dried grease. Here are some photos I found on the net that show the gear placements.<\/p>\n<p style=\"text-align: center;\"><a href=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears2-IMG_0448.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"433\" height=\"489\" class=\"aligncenter size-full wp-image-37\" title=\"FeedGears2-IMG_0448\" src=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears2-IMG_0448.jpg\" alt=\"\" srcset=\"https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears2-IMG_0448.jpg 433w, https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears2-IMG_0448-265x300.jpg 265w\" sizes=\"auto, (max-width: 433px) 100vw, 433px\" \/><\/a><a href=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears1-IMG_0451.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"666\" height=\"595\" class=\"size-full wp-image-36 aligncenter\" title=\"FeedGears1-IMG_0451\" src=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears1-IMG_0451.jpg\" alt=\"\" srcset=\"https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears1-IMG_0451.jpg 666w, https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears1-IMG_0451-300x268.jpg 300w, https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/FeedGears1-IMG_0451-335x300.jpg 335w\" sizes=\"auto, (max-width: 666px) 100vw, 666px\" \/><\/a><\/p>\n<p style=\"padding-left: 60px;\"><a href=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/QuillFeedGears8520-30.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" class=\"size-full wp-image-34 alignnone\" title=\"QuillFeedGears8520-30\" src=\"http:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/QuillFeedGears8520-30.jpg\" alt=\"\" srcset=\"https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/QuillFeedGears8520-30.jpg 640w, https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/QuillFeedGears8520-30-300x225.jpg 300w, https:\/\/www.wentztech.com\/metalworking\/wp-content\/uploads\/2011\/10\/QuillFeedGears8520-30-400x300.jpg 400w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<h1 style=\"padding-left: 60px;\"><\/h1>\n<h1 style=\"padding-left: 60px;\">Rebuilding the Mill Head<\/h1>\n<p style=\"padding-left: 90px;\">There are two nice articles on rebuilding the head on this mill.<br \/>\nDennis Pantazi on changing the bearings &#8211;\u00a0<a href=\"http:\/\/members.core.com\/~chessie\/headrbld.html\" rel=\"self\">Link<\/a>\u00a0&#8211; Local\u00a0<a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/Dennis%20Pantazis%20-%20Head%20Dissasembly%20clausing.pdf\" rel=\"self\">PDF<\/a><br \/>\nFred did a wonderful job of documenting his rebuild &#8211; Local\u00a0<a href=\"http:\/\/wentztech.com\/WebDisk\/Metalworking\/Clausing\/Freds%20-%20Rebuilding%20the%208520%20head.pdf\" rel=\"self\">PDF<\/a><\/p>\n<h1 style=\"padding-left: 60px;\"><\/h1>\n<h1 style=\"padding-left: 60px;\">Bearings<\/h1>\n<p style=\"padding-left: 60px;\">All the bearings with the exception of the lower spindle bearings are commonly available. The Lower head\/spindle bearings are a Class 3 which is specified as having a total runout of 0.0003 or less. They are sold as a ground matched set . Unfortunately they are no longer available from Clausing.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"padding-left: 60px;\"><strong><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Lower head \/ Spindle bearings<\/span><\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Qty 2<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Clausing number 044-005<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Size (25x52x15)<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use Fafnir 7205WNSU<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">These are 39 degree angular contact bearings.<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">They are flush ground for minimum preload when duplexed (2 bearings together)<\/span><\/p>\n<p style=\"padding-left: 60px;\"><strong><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Upper Head bearing<\/span><\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Qty 1<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Clausing Part Number<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use Fafnir 304KDD or, sub 6304ZZ\/ND 3304\/KBC 6304<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Size 20x52x15mm<\/span><\/p>\n<p style=\"padding-left: 60px;\"><strong><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Upper spindle bearing<\/span><\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Qty 1<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Clausing PN 044-016<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Size 20x47x14mm<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use MRC 204SFF, FAG equiv to<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use Fafnir 204KDD, 6204ZZ,304KDD<\/span><\/p>\n<p style=\"padding-left: 60px;\"><strong><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Spindle driven step pulley bearings<\/span><\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Qty 2<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Clausing PN 044-007<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Size 25x47x12mm<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use Fafnir 9105KDD, Fafnir 9105KDD, 6005ZZ<\/span><\/p>\n<p style=\"padding-left: 60px;\"><strong><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Tables and upper idler pulley<\/span><\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Qty 6<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Clausing PN 044-004<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Size (12x32x10mm)<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use Fafnir 201KDD, Fafnir 201KDD, 6201ZZ<\/span><\/p>\n<p style=\"padding-left: 60px;\"><strong><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Lower Idler pulley<\/span><\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Qty 1<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Clausing PN 044-003<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Size 15x35x11mm<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use\u00a0Fafnir 202KDD, Fafnir 202KDD, 6202ZZ<\/span><\/p>\n<p style=\"padding-left: 60px;\"><strong><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Knee screw upper thrust bearing<\/span><\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Qty 1<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Clausing PN 044-011<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use Andrews D-3, standard D-3 thrust bearing for replacement<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Size A .625 &#8211; B 1.244 &#8211; C .563<\/span><\/p>\n<p style=\"padding-left: 60px;\"><strong><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Knee shaft bearings<\/span><\/strong><\/p>\n<p style=\"padding-left: 60px;\"><span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Qty 2<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Clausing PN 044-008<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Use NICE 1607DS, 1607ZZ, 1607<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">NICE 160105 (Part Number of bearings in my mill)<\/span><br \/>\n<span class=\"Apple-style-span\" style=\"font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;\">Size A 7\/16 &#8211; B 29\/32 &#8211; C 5\/16<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Technical Reference on the Clausing 8520 \/ 8530 Mill &nbsp; The Clausing 8520 is a highly sought-after small knee mill due to its versatility and light weight. I can be broken down into lighter pieces and easily moved, even up or down stairs. This makes it ideal for the home shop. History: The 8520 was &hellip; <a href=\"https:\/\/www.wentztech.com\/metalworking\/equipment\/clausing-8520-mill\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Clausing 8520 Mill<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":5,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-7","page","type-page","status-publish","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/pages\/7","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/comments?post=7"}],"version-history":[{"count":40,"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/pages\/7\/revisions"}],"predecessor-version":[{"id":477,"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/pages\/7\/revisions\/477"}],"up":[{"embeddable":true,"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/pages\/5"}],"wp:attachment":[{"href":"https:\/\/www.wentztech.com\/metalworking\/wp-json\/wp\/v2\/media?parent=7"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}