{"product_id":"hertel-1000187-lh-mtjn-indexable-turning-toolholder","title":"Hertel 1000187 Lh Mtjn Indexable Turning Toolholder","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 1000187 is a left-hand MTJN-style negative rake indexable turning toolholder designed for use on metalworking lathes and turning centers. The toolholder accepts TN..33. series inserts, specifically the TN.. 332, secured by a clamp and screw holding method. It features a 1 inch by 1 inch square shank and an overall length of 6 inches, making it a standard-profile holder suitable for external turning operations. Constructed from steel, this holder is part of the Multi-Option series and is built to maintain rigidity and dimensional repeatability through repeated insert changes.\u003c\/p\u003e\u003cp\u003eThis toolholder is intended for external turning applications on manual lathes, engine lathes, and CNC turning centers where left-hand cutting geometry is required. The negative rake configuration is well suited for interrupted cuts and harder workpiece materials where edge strength is a priority. The 3-degree lead angle and 1.25 inch back-of-bar to cutting edge distance position the insert correctly for consistent chip control and surface finish. It is typically used by machinists and toolroom professionals in job shop and production environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLeft-hand MTJN toolholder style with negative rake geometry for strong edge support\u003c\/li\u003e\n\u003cli\u003eAccepts TN.. 332 inserts with a 0.375 inch inscribed circle via clamp and screw retention\u003c\/li\u003e\n\u003cli\u003e1 inch by 1 inch square shank with 6 inch overall length for rigid setup\u003c\/li\u003e\n\u003cli\u003e1.25 inch back-of-bar to cutting edge distance for precise tool positioning\u003c\/li\u003e\n\u003cli\u003e1.12 inch head length for compact nose geometry\u003c\/li\u003e\n\u003cli\u003eSteel construction for durability and deflection resistance under cutting loads\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eCompatible with TN.. 332 series indexable inserts with a 0.375 inch inscribed circle. Insert holding is achieved via clamp and screw method standard to MTJN-style toolholders.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist familiar with indexable toolholder setup procedures. Secure the shank firmly in the tool post or turret according to the machine tool manufacturer torque and clamping specifications. Ensure the machine spindle is fully stopped and locked out before changing inserts or repositioning the holder. Verify insert seating and clamp engagement before resuming cutting operations.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Style\u003c\/strong\u003e: MTJN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHand of Holder\u003c\/strong\u003e: Left Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRake\u003c\/strong\u003e: Negative\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Width\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Height\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Length\u003c\/strong\u003e: 1.12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack of Bar to Cutting Edge\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Inscribed Circle\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Compatibility\u003c\/strong\u003e: TN.. 332\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsert Holding Method\u003c\/strong\u003e: Clamp and Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eToolholder Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Multi-Option\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.9 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 1000187\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51732644626738,"sku":"1000187","price":232.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5b209261f785b68db0bd42bdd696e0fe.jpg?v=1788745370","url":"https:\/\/voomisupply.com\/products\/hertel-1000187-lh-mtjn-indexable-turning-toolholder","provider":"Voomi Supply","version":"1.0","type":"link"}