MIR Series | Solid Carbide Micro Boring Bars | Precision Internal Threading Tools for Small Diameter Threads

Material: Ultra-fine grain tungsten carbide
Application: Small hole internal thread machining
Packaging: Shock-proof plastic tubes & export cartons
Shipping: Fast air express (DHL/FedEx) in 5-7 days
OEM & Custom: Support for custom drawings & private labeling

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PRODUCT DETAILS

MIR Series Solid Carbide Micro Boring Bars

The MIR Series is a precision solid carbide micro boring bar specially designed for small-hole internal thread machining, including Metric and Whitworth threads.

Equipped with a 60° thread forming blade, it delivers accurate thread profiles and excellent surface finish on internal thread flanks and small-diameter threaded holes. Its high-rigidity carbide construction ensures stable performance even in deep, tight bores where vibration control is essential.

Key Features & Applications:

Precision internal threading in small-diameter holes
60° thread forming blade for Metric and Whitworth threads
Excellent thread flank accuracy and surface finish
High rigidity minimizes vibration during threading
Ideal for stainless steel, titanium, and precision components

MIR Series Specifications

MIR Series Solid Carbide Micro Boring Bars Specifications

Model	F	L1	S	R	D	L2	Pitch	Min Hole
MIR-14050-60°	1.4	5	0.4	0	4	50	0.2-0.35	1.5
MIR-18070-60°	1.8	7	0.6	0	4	50	0.35-0.6	2.0
MIR-24070-60°	2.4	7	0.6	0	4	50	0.35-0.7	2.5
MIR-30060-60°	3.0	6	0.8	0.03	4	50	0.5-0.75	3.1
MIR-30120-60°	3.0	12	0.8	0.03	4	50	0.5-0.75	3.1
MIR-40100-60°	3.85	10	1.0	0.05	4	50	0.5-1.0	4.0
MIR-40150-60°	3.85	15	1.0	0.05	4	50	0.5-1.0	4.0
MIR-50100--60°	4.8	10	1.5	0.08	5	50	0.75-1.0	5.0
MIR-50150-60°	4.8	15	1.5	0.08	5	50	0.75-1.0	5.0
MIR-50220-60°	4.8	22	1.5	0.08	5	50	0.75-1.0	5.0
MIR-60100-60°	5.6	10	1.8	0.1	6	50	1.0-1.5	6.0
MIR-60150-60°	5.6	15	1.8	0.1	6	50	1.0-1.5	6.0
MIR-60200-60°	5.6	20	1.8	0.1	6	50	1.0-1.5	6.0
MIR-60300-60°	5.6	30	1.8	0.1	6	60	1.0-1.5	6.0
MIR-80150-60°	7.8	15	2.2	0.1	8	50	1.0-1.75	8.0
MIR-80220-60°	7.8	22	2.2	0.1	8	50	1.0-1.75	8.0

Custom lengths and coatings available upon request.

MIR Series | Solid Carbide Micro Boring Bars | Precision Internal Threading Tools for Small Diameter Threads

MIR Series Solid Carbide Micro Boring Bars

MIR Series Specifications

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