{"id":4040,"date":"2026-08-05T12:19:36","date_gmt":"2026-08-05T12:19:36","guid":{"rendered":"https:\/\/hycuttingtools.com\/?post_type=product&p=4040"},"modified":"2026-09-24T08:28:08","modified_gmt":"2026-09-24T08:28:08","slug":"mtr-series-solid-carbide-micro-boring-bars","status":"publish","type":"product","link":"https:\/\/hycuttingtools.com\/fa\/product\/mtr-series-solid-carbide-micro-boring-bars\/","title":{"rendered":"MTR Series Solid Carbide Micro Boring Bars for Small Bore Internal Turning"},"content":{"rendered":"
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MTR Solid Carbide Micro Boring Bar Overview<\/h2>\n

The MTR Series is a precision-ground solid carbide micro boring bar designed for internal turning, bore finishing and diameter correction in small-diameter holes. Its compact cutting geometry provides access to miniature bores and internal shoulders while the one-piece carbide construction helps maintain rigidity and dimensional stability.<\/p>\n

Standard models cover cutting diameters from \u00d80.8 to \u00d811.9 mm, nose radii from R0.05 to R0.40 mm and clearance lengths from 3 to 50 mm. Standard and extended-length versions are available for precision components, sleeves, bushings, hydraulic parts and other CNC-turned components.<\/p>\n<\/section>\n

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Key Product Features<\/h3>\n
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\u2022 Small-Bore Internal Turning<\/strong>Cutting diameters from \u00d80.8 to \u00d811.9 mm support precision boring and finishing of miniature internal features.
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\u2022 Precision-Ground Cutting Geometry<\/strong>A 5\u00b0 front relief and 7\u00b0 clearance geometry provide cutting-edge access while reducing unnecessary contact with the bore wall.
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\u2022 Fine-Grain Solid Carbide<\/strong>The one-piece carbide body provides higher rigidity than conventional miniature steel-shank tools and helps control vibration during internal machining.
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\u2022 Standard and Long-Reach Options<\/strong>Clearance lengths from 3 to 50 mm and overall lengths up to 100 mm are available for shallow bores and recessed internal features.
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Typical Applications<\/h3>\n
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Application<\/th>\nMachining Purpose<\/th>\n<\/tr>\n<\/thead>\n
Small-Hole Boring<\/strong><\/td>\nEnlarging and correcting small pre-machined holes to the required internal diameter.<\/td>\n<\/tr>\n
Precision Bore Finishing<\/strong><\/td>\nFinal internal turning passes requiring controlled diameter, roundness and surface finish.<\/td>\n<\/tr>\n
Internal Shoulder Machining<\/strong><\/td>\nFinishing short internal steps, shoulders and recessed bore features.<\/td>\n<\/tr>\n
Deep or Recessed Bores<\/strong><\/td>\nLong-reach models provide access to internal features positioned farther from 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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