Model: | - |
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Brand: | HIGRED |
Origin: | Made In China |
Category: | Industrial Supplies / Tools / Electric Power Tools |
Label: | STEP DRILL , DRILL BIT , TOOLS |
Price: |
US $10
/ pc
|
Min. Order: | 10 pc |
STEP DRILLS
STEP DRILL BIT
A STEP DRILL BIT is a drill bit that has the tip ground down to a different diameter. The transition between
this ground diameter and the original diameter is either straight, to form a counterbore, or angled, to form a counter
sink. The advantage to this style is that both diameters have the same flute characteristics, which keeps the bit from
clogging when drilling in softer materials, such as aluminum; in contrast, a drill bit with a slip-on collar does not have
the same benefit. Most of these bits are custom-made for each application
STEP DRILL BIT Usage:
1. Put on appropriate eye protection (safety glasses or goggles).
2..Place the tip of the center punch on the metal to be drilled at the location of the desired hole. Hit the blunt end
of the center punch with the hammer to leave an indentation (referred to as a center mark). This indentation will
provide a place for the drill bit to "catch" so it doesn't drift to the wrong location on the work.
3. Secure the self-starting step drill bit into the chuck of the drill motor. Apply cutting and tapping fluid to the center
mark and the step drill drill bit.
4. Align the tip of the self-starting step drill bit with the center mark on the metal's surface. Depress the drill's
trigger to start drilling the hole. Run the small step drill bit completely through the metal. Apply additional cutting
and tapping fluid as necessary to keep the step drill bit cool.
5. Release the chuck of the drill motor to remove the small step drill bit. Secure the large step drill bit into the
chuck of the drill motor. Insert the small tip of the large step drill bit into the hole you created in the metal. Apply
cutting and tapping fluid onto the large step drill bit and around the hole in the metal.
6. Depress the trigger of the drill motor to run the large-diameter step drill bit into the hole. Stop drilling frequently
to apply additional cutting and tapping fluid to the drill bit. Stop drilling when the hole has reached the desired diameter.
7. Remove the large step drill bit from the drill motor. Clean both step drill bits with a rag to remove metal shavings
from the bits. Clean the metal shavings from around the hole that you drilled in the metal. Store the drill bits in a tool
box or drill bit container to avoid dropping them or otherwise damaging them.
Performance:
Step drill bits are used to drill metal up to 1/4 of an inch thick. Step drill bits are designed to enlarge a hole as the
bit drills through the sheet metal. Each step on the bit is larger in diameter than the step before. Smaller step drill bits
are self-starting and no pilot bit is required to start the hole. On larger step drill bits, you need to have a hole pre-drilled
that is equal in diameter to the smallest step on the bit.Perfect for drilling multiple-size holes in thin sections of metal,
plastic and wood using a single bit. Each HIGRED-Unibit does the work of many drill-bit sizes.
Drills round holes in most metals (steel, brass, aluminum, copper) up to 1/8" (3.2 mm) thick as well as in plastic and wood.
No center punching or pilot hole drilling is required on most sizes.
The bits are easy to keep sharp.. and the hole size is easily determined by the diameter markings that are permanently
laser-etched in the flute areas.
Fabricated of r ed, high-speed steel in sizes to fit 1/4", 3/8" or 1/2" chuck of portable electric drills and drill presses.
MANUFACTURING features:
l HSS/Cobalt-HSS optional.
l Tin-coated/uncoated
l Single/Two/Three flutes
l Straight/Round/Spiral flutes
l Round/Three Flat/Quick Release shank
l High Speed Steel for long tool life and extra durability
l Up to 14 conventional drill sizes on one tool
l Drills material up to 10mm thick
l Non-slip point needs no center punch
l Enlarge existing holes
Mirror Polish 2 cutting surfaces allows for a quicker and cleaner cut
Clean cuts, burr-free hole in stainless steel, mild steel, cast iron, plastic and wood
Payment Terms: | TT/LC/WESTERN UNION/PAYPAL |
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KUNSHAN HIGRED TOOLS CO.,LTD | |
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Country/Region: | Jiang Su - China |
Business Nature: | Manufacturer |
Phone: | 13182656993 |
Contact: | Judy (sales) |
Last Online: | 11 Jun, 2014 |