{"id":4042,"date":"2026-08-05T12:25:05","date_gmt":"2026-08-05T12:25:05","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&p=4042"},"modified":"2026-09-19T11:32:53","modified_gmt":"2026-09-19T11:32:53","slug":"mxr-series-solid-carbide-micro-back-turning-bars","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/ru\/%d0%bf%d1%80%d0%be%d0%b4%d1%83%d0%ba%d1%82\/mxr-series-solid-carbide-micro-back-turning-bars\/","title":{"rendered":"MXR Series Solid Carbide Micro Back Turning Bars for Small Bore Internal Machining"},"content":{"rendered":"
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MXR Micro Back Turning Bar Overview<\/h2>\n

The MXR Series is a precision-ground solid carbide micro back turning bar designed for machining rear faces, internal undercuts and recessed features behind shoulders in small-diameter bores. The tool enters through the bore, passes the internal shoulder and cuts during a controlled reverse-feed movement.<\/p>\n

Standard models cover cutting diameters from \u00d82.8 to \u00d85.9 mm, cutting widths of 1.3 and 1.5 mm, and clearance lengths from 10 to 22 mm. The one-piece carbide construction provides the rigidity and dimensional stability required for restricted-access internal machining.<\/p>\n<\/section>\n

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Key Product Features<\/h3>\n
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\u2022 Reverse-Feed Back Turning<\/strong>Designed to pass an internal shoulder and machine the rear face or recessed feature during reverse tool movement.
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\u2022 30\u00b0 Cutting Geometry<\/strong>The defined cutting geometry provides clearance for controlled back turning and internal undercut machining.
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\u2022 Small-Bore Accessibility<\/strong>Cutting diameters from \u00d82.8 mm provide access to rear-facing features in miniature and precision-turned components.
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\u2022 Rigid Solid Carbide Body<\/strong>Fine-grain solid carbide construction helps control tool deflection and supports repeatable rear-face dimensions.
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\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435<\/th>\nMachining Purpose<\/th>\n<\/tr>\n<\/thead>\n
Internal Back Turning<\/strong><\/td>\nMachining a rear-facing internal surface by cutting in the reverse feed direction.<\/td>\n<\/tr>\n
Rear Shoulder Finishing<\/strong><\/td>\nFinishing the back face of an internal shoulder that cannot be reached with a conventional boring bar.<\/td>\n<\/tr>\n
Internal Undercutting<\/strong><\/td>\nProducing controlled relief features and recessed areas behind internal shoulders.<\/td>\n<\/tr>\n
Recessed Feature Machining<\/strong><\/td>\nMachining hidden or restricted internal features after the cutting edge passes through the bore entrance.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

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Micro Internal Machining Methods<\/h3>\n
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