MSU manufactures solid carbide micro drills in the current 326, 326L, 426 and 426L series. Catalog cutting diameters begin at 0.03 mm for 326 and 426 and at 0.04 mm for the extra-long-flute 326L and 426L series.
Compare the selected catalog entry by cutting diameter, flute length, overall length, 3.0 mm shank, point configuration and catalog coating marking. Submit the hole, workpiece, machine, holder and coolant conditions for review before selection or quotation.
Send the required micro-hole diameter and depth, workpiece, setup, quantity and target date for review.
The current carbide micro drills are organized into four catalog series. Compare the regular- and extra-long-flute formats, cutting-diameter range, point configuration and catalog coating marking before selecting a catalog entry.
326
326 Micro Drills
Regular flute
0.03–3.0 mm
120° point, 3.0 mm shank and row-specific flute and overall lengths.
326L
326L Micro Drills
Extra-long flute
0.04–3.0 mm
120° point, 3.0 mm shank and row-specific flute and overall lengths.
426
426 Micro Drills
Regular flute
0.03–3.0 mm
118° point up to 1.0 mm, 135° above 1.0 mm, 3.0 mm shank and TiAlN catalog marking.
426L
426L Micro Drills
Extra-long flute
0.04–3.0 mm
118° point up to 1.0 mm, 135° above 1.0 mm, 3.0 mm shank and TiAlN catalog marking.
These solid carbide micro drills are intended for industrial metalworking. PCB, dental, jewelry and hobby drills are separate product types. Micro End Mills are milling tools. Use Solid Carbide Drills for the standard 3D, 5D and 8D drill groups and Solid Carbide Deep Hole Drills for the 10D–30D groups.
Continue from the four series to compare diameter, length, point and catalog configuration fields.
Use the complete selected catalog entry rather than the series name alone. The diameter tolerance shown below is a product-dimension field and does not establish the drilled-hole tolerance.
MSU micro drill series, catalog diameter ranges, diameter tolerance fields and other catalog fields.
Series
Catalog diameter range
Diameter tolerance shown
Other catalog fields
326
0.03–3.0 mm
0 / −0.003 mm
Regular flute, 120° point, 3.0 mm shank, row-specific flute and overall lengths
326L
0.04–3.0 mm
0 / −0.005 mm
Extra-long flute, 120° point, 3.0 mm shank, row-specific flute and overall lengths
426
0.03–3.0 mm
0 / −0.005 mm
118° point at cutting diameter up to 1.0 mm; 135° above 1.0 mm; 3.0 mm shank; TiAlN catalog marking
426L
0.04–3.0 mm
0 / −0.005 mm
Extra-long flute; 118° point at cutting diameter up to 1.0 mm; 135° above 1.0 mm; 3.0 mm shank; TiAlN catalog marking
Flute length and overall length vary by the selected cutting diameter and catalog entry. Also compare hole depth, required reach, holder and runout, coolant delivery, chip evacuation conditions and machine capability. An extra-long flute is a geometry choice, not a universal recommendation for deeper holes or a guarantee of drilling stability.
Use the catalog comparison to prepare the hole, setup and process inputs needed for selection review.
Provide the complete micro-hole, workpiece and setup information so MSU can review the applicable catalog entry or a custom requirement.
Required hole diameter, tolerance, depth and whether the hole is through or blind.
Entry surface, exit condition, cross-hole or interrupted features when present.
Workpiece material, grade, hardness and stock condition when known.
Machine type, spindle-speed range, spindle interface and available rigidity.
Holder or collet, grip length, overhang and measured runout when available.
Coolant method, pressure and filtration, plus the planned chip-evacuation approach.
Current tool code, feed, speed, pecking or other cycle details and the observed issue when replacing a tool.
Quantity, destination country, target date and any required inspection document.
Selection and custom geometry
The selected cutting diameter must be paired with its row-specific flute length and overall length. A required hole tolerance or surface condition must be reviewed as an application and inspection requirement; it cannot be inferred from the drill-diameter tolerance.
For a step drill or another geometry outside the current catalog entries, submit the part and tool drawings through Custom Cutting Tools for feasibility review.
Send the selected catalog entry or required micro-hole data with the complete setup for review.
Use this series register for initial routing, then verify the complete product code, dimensions and configuration in the current catalog.
326
326 Micro Drills
Regular flute · 0.03–3.0 mm · 3.0 mm shank
Cutting diameter, flute length, overall length and point configuration.
326L
326L Micro Drills
Extra-long flute · 0.04–3.0 mm · 3.0 mm shank
Cutting diameter, flute length, overall length and point configuration.
426
426 Micro Drills
Regular flute · 0.03–3.0 mm · 3.0 mm shank
Cutting diameter, flute length, overall length, point configuration and TiAlN catalog marking.
426L
426L Micro Drills
Extra-long flute · 0.04–3.0 mm · 3.0 mm shank
Cutting diameter, flute length, overall length, point configuration and TiAlN catalog marking.
Confirm from the selected catalog entry
Complete product code
Cutting diameter and product tolerance
Flute length and overall length
Point configuration
Shank and holder condition
Catalog coating marking
Availability and order terms
Use the catalog machining-parameter tables with the exact drill diameter, workpiece, machine, holder, coolant method and hole conditions stated for the selected application.
The Downloads page provides the current Micro Drill catalog.
Open the current catalog to identify the exact micro-drill entry and dimensional fields.
Micro Drills are within the MSU-manufactured Holemaking Tools range. The current Micro Drill catalog lists the four series and their product specification fields.
See MSU Factory for manufacturing facilities and Quality Control for inspection and measurement processes.
For an order, the selected product code or approved drawing, critical tool dimensions and inspection requirements are confirmed in the quotation and order records. The catalog diameter tolerance is a product specification field and does not establish an achievable hole tolerance. Product-specific process capability, tool life, surface result and output requirements must be reviewed with the applicable conditions and records.
Review the quality environment and how order-specific dimensions and inspection requirements are confirmed.
Send the series or complete product code when known, required hole diameter and depth, part drawing, workpiece, machine and spindle, holder and runout, coolant method, cutting cycle, quantity, destination and target date.
Inquiry details
Include the series or complete code, hole diameter and depth, workpiece, machine and spindle, holder and runout, coolant method, cutting cycle, quantity, destination and target date.
Replacement details
For a replacement request, include current-tool photos, every visible marking and the current cutting conditions or observed issue.
MOQ
MOQ is normally 5–10 pieces, with the final quantity confirmed by product and quotation.
Samples
Samples are charged according to the product, and sample freight is paid by the customer.
Lead time and payment
Completion of the whole order is guaranteed within 25–30 days from order placement. T/T with deposit and balance is supported; percentages and milestones are stated in the quotation or order.
Trade terms and packaging
EXW, FOB, CIF and DDP can be discussed and are confirmed by order, destination and feasibility. Quotations remain valid for 30 days. Packaging is confirmed in the quotation or order.
After-sales review
Report a concern within 30 days after receipt and include applicable photos, batch details, measurement report or video. Each case is reviewed individually.
The range includes 326, 326L, 426 and 426L solid carbide micro drills.
The 326 and 426 series cover 0.03–3.0 mm. The 326L and 426L extra-long-flute series cover 0.04–3.0 mm.
No. It is a product-dimension field. The required hole tolerance depends on the complete application and must be stated for review.
The current catalog identifies 326L and 426L as extra-long-flute series. The required flute length and overall length must be confirmed from the selected catalog entry.
No. This range is intended for industrial metalworking micro-hole requirements. PCB, dental, jewelry and hobby drills are separate product types.
Do not transfer a parameter without checking the selected diameter, workpiece, machine, holder, coolant delivery and hole conditions.
Completion of the whole order is guaranteed within 25–30 days from order placement.
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