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MICRO 100 Round Blank: 5/16 in Size-Dia - Fractional-Inch Carbide Drill Bit Blanks
MICROFractional-Inch Carbide Drill Bit Blanks

MICRO 100 Round Blank: 5/16 in Size-Dia

The MICRO 100 SR-312-2 is a fractional-inch carbide drill bit blank with a 5/16 in (0.3125 in) diameter and a 2 in overall length. It features a diameter tolerance of -0.0001/-0.0002 in, ensuring precision for custom…

SKU 3G-OTH-196289

Also listed as: SR3122 · SR 312 2

Brand
MICRO
Item
100 Round Blank: 5/16 in Size-Dia
Category
Fractional-Inch Carbide Drill Bit Blanks
Available to Order
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

MICRO
Manufacturer Part Number
SR-312-2

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MICRO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MICRO 100 SR-312-2 is a fractional-inch carbide drill bit blank with a 5/16 in (0.3125 in) diameter and a 2 in overall length. It features a diameter tolerance of -0.0001/-0.0002 in, ensuring precision for custom tool grinding applications.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the MICRO 100 SR-312-2 round blank used for?

The MICRO 100 SR-312-2 is a fractional-inch carbide drill bit blank used for custom tool grinding. It allows machinists to create specialized drills, reamers, or end mills by grinding the blank to desired geometries. It is common in precision machining, mold making, and aerospace applications where tight tolerances are required.

What are the specifications of the MICRO 100 SR-312-2?

The MICRO 100 SR-312-2 is a carbide round blank with a 5/16 in (0.3125 in) diameter and a 2 in overall length. Its diameter tolerance is -0.0001/-0.0002 in, ensuring high precision for grinding custom cutting tools. The manufacturer part number is SR-312-2.

Where to buy the MICRO 100 SR-312-2 worldwide?

3G Electric supplies the MICRO 100 SR-312-2 worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this precision carbide blank to any country.

How to select the correct MICRO 100 round blank for custom tool grinding?

Select a MICRO 100 round blank based on the finished tool's required diameter and length. The SR-312-2 offers a 5/16 in diameter with a tight -0.0001/-0.0002 in tolerance, ideal for grinding drills or reamers. Ensure the blank's diameter matches your target tool size after grinding, and use proper carbide grinding techniques.

Used in

Common applications for MICRO
Aerospace machining — MICRO 100 SCLCR toolholders for turning titanium alloys
Automotive production — MICRO 100 SR series blanks for custom drill bits in engine blocks
Plastic component fabrication — MICRO 100 SFL downcut router bits for acrylic sheet cutting
Aluminum extrusion finishing — MICRO 100 SFA upcut router bits for deburring profiles
Mold and die making — MICRO 100 SCMCN toolholders for profiling hardened steel cavities
Composite panel trimming — MICRO 100 SFPM spiral router bits for carbon fiber laminates

MICRO Products

3G Electric supplies MICRO fractional-inch carbide drill bit blanks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

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Carbide round blank with 5/16 in (0.3125 in) diameter and 12 in overall length. Diameter tolerance of -0.0001/-0.0002 in. Used for custom tool grinding to produce drills, reamers, or end mills in precision metalworking applications
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This fractional-inch carbide drill bit blank has a 3/16 in diameter and 2 in overall length, with a diameter tolerance of -0.0001/-0.0002 in. It is used for creating custom cutting tools, drills, or reamers in precision machining and tool making applications
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