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Overview
- High Speed Steel (HSS) construction for durability and performance.
- 1/4" to 1-1/2" drilling range for versatile applications.
- 2-flute split tip design eliminates pre-punching.
- 3-flat shank provides a secure, non-slip grip in chucks.
- Ideal for drilling metal studs, boxes, and fixtures.
Specifications
Application | aluminum;brass;copper;hole enlarging;plasterboard;Plexiglass;PVC;sheet metal;Steel |
Application | Steel, copper, brass, aluminum, Plexiglass, sheet metal, PVC, plasterboard, hole enlarging |
Drill Diameter, Maximum | 1-1/2 in |
Drill Diameter, Minimum | 1/4 in |
Exchanging Centering Tip | No |
Material | High Speed Steel |
Maximum Drill Diameter | 1-1/2" |
Minimum Drill Diameter | 1/4" |
Number of Blades | 1 |
Size | 1/4" to 1-1/2" |
Special Features | Reduce secondary operations with trailing flute that automatically deburs holes. |
Spiral Groove | True |
Spiral Groove | Yes |
Type | Step Drill |

86712
This is a step drill with a 2-flute split tip design. It is made for drilling or enlarging holes in steel, copper, brass, aluminum, Plexiglass, sheet metal, PVC, and plasterboard. The drill has 8 stages and a minimum drill diameter of 1/4" with a maximum drill diameter of 3/4".
SD12
Multi Step Drill, 13 drill stages, 1/8 in. minimum drill diameter, 1/8 in. maximum sheet metal thickness, 1/2 in. maximum drill diameter, 1 per pack
SD34
Multi Step Drill, 9 drill stages, 1/4 in. minimum drill diameter, 1/8 in. maximum sheet metal thickness, 3/4 in. maximum drill diameter, 1 per pack
SD78
Multi Step Drill, 3 drill stages, 7/8 in. minimum drill diameter, 1/8 in. maximum sheet metal thickness, 1-1/8 in. maximum drill diameter, 1 per pack
SDCP3
Multi Step Drill, 1/2, 3/4, 1-1/8 in. maximum drill diameter, 1/8, 1/4, 7/8 in. minimum drill diameter, 13, 9, 3 number of drill stages, 1 per packFrequently Asked Questions
What materials can this step drill bit be used on?
This step drill bit is designed to drill through 10-gauge mild steel and stainless steel with ease.
Does this drill bit require pre-punching holes?
No, the 2-flute split tip design on this step drill bit eliminates the need for pre-punching.
What is the shank type of the Minerallac 86724?
The Minerallac 86724 features a 3-flat shank, which ensures a secure, non-slip grip in standard drill chucks.
What is the size range of this step drill bit?
This step drill bit has a drilling range from 1/4 inch up to 1-1/2 inches.
Where is the Minerallac 86724 step drill bit manufactured?
The Minerallac 86724 step drill bit is made in the USA.
Frequently Asked Questions about Minerallac Company
What are the main product lines offered by Minerallac Company?
Minerallac Company offers multiple comprehensive product lines including Minerallac Traditional (electrical fasteners), Strut Fittings, Stainless Steel Fasteners, Black Claw, Impact Staples, and Redmore. Their Traditional line features over a thousand electrical fastener variations covering conduit/cable/wire products, nail straps, beam clamps, metal stud & drywall accessories, acoustical supports, voice/data hardware, and miscellaneous electrical installation components.
What is Minerallac Company's warranty policy?
Minerallac Company provides a limited warranty that guarantees all products are free from defects in material and workmanship. If a product fails to meet this warranty, Minerallac's sole liability is to replace the product at no charge. The warranty is exclusive and does not cover consequential damages, lost profits, or implied warranties of merchantability or fitness for a particular purpose.
What industries and applications are Minerallac Company products used for?
Minerallac Company products are used extensively across electrical, construction, and industrial applications, including conduit and cable support, beam mounting, metal stud and drywall installation, voice/data infrastructure, and low voltage systems. Their product lines cover critical fastening solutions for electrical contractors, with specialized offerings in conduit hangers, straps, beam clamps, cable supports, and mounting hardware for various industrial environments.
What technical support does Minerallac Company offer?
Minerallac Company offers comprehensive technical support through multiple channels, including a toll-free customer service line at 800-927-3293, email support at [email protected], and online resources at www.minerallac.com. Their support covers product selection, technical specifications, and customer service for their extensive line of electrical fasteners, hangers, straps, and hardware across multiple product brands including Minerallac Traditional, Cully, Black Claw, IMPACT Staples, and Minerallac Stainless Steel. Support hours are 8:00 A.M. to 5:00 P.M. CT for their corporate office and 8:00 A.M. to 5:00 P.M. PT for their regional office.
What are the key features of Minerallac Company products?
Minerallac Company products feature a comprehensive range of electrical fasteners and hardware with exceptional versatility, including over 1,000 different sizes, styles, and finishes. Key features include multiple product lines such as Traditional, Strut Fittings, and Stainless Steel options with specialized finishes like 304/316 Stainless Steel, Hot-Dipped Galvanized, and Zinc Electroplate. Their products are engineered for electrical contractors, offering time-saving solutions with high-quality fasteners designed for durability, corrosion resistance, and worker safety across various installation environments.
What environmental ratings do Minerallac Company products have?
Minerallac Company products have robust environmental ratings, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13 certifications, CSA Type 1-4X, 12, and 13 ratings, and IEC 60529 IP66 protection. The products are WEEE and RoHS compliant, with UV and oil resistance, and can operate in extreme temperatures ranging from -55°C to 105°C, making them suitable for harsh industrial environments.
What accessories are available for Minerallac Company products?
Minerallac Company offers a comprehensive range of accessories across multiple product categories, including hardware, fasteners, and mounting solutions. Key accessories include stove bolts with nuts, wing nut washers, bar joist washers, stud clip adapters, brackets, perforated strapping, cable support options like J-hooks and bridle rings, box mounting brackets, outlet retainers, and various stud and drywall supports. Their accessories are available in multiple finishes such as stainless steel, hot-dipped galvanized, zinc electroplate, and powder-coated options.
How are Minerallac Company products typically installed?
Minerallac Company products are typically installed using a variety of specialized fastening solutions, including conduit hangers, straps, beam clamps, and mounting brackets designed for different electrical and construction applications. Installation methods vary by product type, with options for metal studs, drywall, beams, acoustical surfaces, and low voltage systems. The company offers multiple installation styles such as one-hole and two-hole straps, universal beam clamps, and specific mounting hardware to ensure secure and efficient attachment across diverse electrical and construction environments.
What communication protocols do Minerallac Company products support?
Minerallac Company's Brad product line supports multiple industrial communication protocols, including Ethernet, DeviceNet, PROFIBUS, Modbus, CANopen, Serial, AS-interface, and CC-Link. Their comprehensive portfolio covers over 40 industrial protocols, providing flexible communication solutions for various industrial automation applications from PC-based control to PLC systems.

