{"product_id":"sherline-p-n-1200-1-4-hss-internal-right-hand-thread-tool-copy","title":"Sherline P\/N 2261 RH 55° and 80° 3\/8″ Boring Bars w\/Carbide Inserts","description":"\u003cdiv class=\"col-md-6\"\u003e\n\u003cdiv class=\"col-md-6\"\u003e\n\u003ch3 data-start=\"95\" data-end=\"274\"\u003eI have been told by customers that the inserts are often gold coloured instead of grey as shown in the photos from Sherline. Because of this I have opened the package and found that the boring bars in this package actually include one with a grey coloured insert and one with a gold coloured insert. The actual inserts just have a different coating. I think this must have occurred as Sherline transitioned from one insert supplier to another. I am including a photo from Sherline as well as the photos of the opened product. \u003c\/h3\u003e\n\u003ch3 data-start=\"95\" data-end=\"274\"\u003eThese 3\/8″ diameter boring bars feature a carbide insert secured with a Torx® screw and come complete with a Torx wrench. Choose between:\u003c\/h3\u003e\n\u003cul data-start=\"276\" data-end=\"515\"\u003e\n\u003cli data-start=\"276\" data-end=\"400\"\u003e\n\u003ch3 data-start=\"278\" data-end=\"400\"\u003eA 55° right-hand insert, suitable for starting holes as small as 3\/4″, ideal for reaching sharp internal corners\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"401\" data-end=\"515\"\u003e\n\u003ch3 data-start=\"403\" data-end=\"515\"\u003eAn 80° insert, which fits into a smaller 1\/2″ hole and offers added strength for roughing operations\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"517\" data-end=\"792\"\u003eEach holder measures 3-1\/4″ long and can bore to a depth of just over 2″ when properly secured with two set screws. Manufactured from durable 1144 Stressproof® steel with a black oxide finish, these tools are available individually or as a discounted set.\u003c\/h3\u003e\n\u003ch3 data-start=\"799\" data-end=\"839\"\u003eWhy Choose Carbide Insert Tools?\u003c\/h3\u003e\n\u003ch3 data-start=\"841\" data-end=\"1030\"\u003eWhile high-speed steel (HSS) remains common for small machine tools due to its low cost and resharpenability, carbide inserts offer significant advantages in demanding applications:\u003c\/h3\u003e\n\u003cul data-start=\"1032\" data-end=\"1316\"\u003e\n\u003cli data-start=\"1032\" data-end=\"1168\"\u003e\n\u003ch3 data-start=\"1034\" data-end=\"1168\"\u003eLonger-lasting edges when cutting hard metals like stainless steel, titanium, or abrasive materials such as carbon fiber\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1169\" data-end=\"1221\"\u003e\n\u003ch3 data-start=\"1171\" data-end=\"1221\"\u003eFaster cutting speeds and greater efficiency\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1222\" data-end=\"1316\"\u003e\n\u003ch3 data-start=\"1224\" data-end=\"1316\"\u003eEach insert can be rotated 180°, effectively giving you two cutting edges per insert\u003c\/h3\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1318\" data-end=\"1461\"\u003eAlthough carbide inserts can’t be resharpened, their durability and versatility make them a preferred choice in professional machine shops.\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003ch3\u003e \u003c\/h3\u003e\n\u003c\/div\u003e","brand":"Sherline","offers":[{"title":"Default Title","offer_id":46971767324868,"sku":null,"price":175.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0565\/1778\/7844\/files\/Screenshot_2026-10-08_at_10.14.17_AM.png?v=1791469317","url":"https:\/\/cardontools.ca\/products\/sherline-p-n-1200-1-4-hss-internal-right-hand-thread-tool-copy","provider":"Cardon Tools","version":"1.0","type":"link"}