Metal Hole Cutting Tools and Multi-Purpose Hole Saws
- Step Drill Bits
- Jobber Length Drill Bits
- Drill Bit Sets
- Machine Thread Taps
- Metal Hole Punches (Electrical Knockout Punches)
- Multi-Purpose Hole Saws & Accessories ... New!
Check Out Our Competitive Prices
All Jobber Length Drill Bits and Step Drill Bits have Split Points and come in two different materials:
- The Split Point reduces “walking” which is the tendency of a spinning bit to rotate away from the point at which you want to drill
- The High Speed Steel (HSS) allows the bit to cut faster than High Carbon Steel. At room temperature, HSS and high carbon steel have an equivalent hardness;
at elevated temperatures, HSS become advantageous
- The Titanium Nitride (TiN) coating is an extremely hard ceramic. It is often used as a coating on HSS to improve hardness and durability
|
|
 |
Step Drill Bits
Self-starting step drill bits offer a unique tip design which eliminates not only skidding, but also the need for center punching.
The spiral flutes of RUKO high-performance
step drill bits are CBN-ground from the
solid hardened form. Because CBN
(cubical boron nitride) is a much harder
abrasive than even silicon carbide or
corundum, a better and sharper cutting
edge is achieved without burrs. Because of
this higher dimensional precision, the step drills
will last considerably longer while maintaining
precise process tolerances.
Available in High Speed Steel and Titanium
Nitride-coated (TiN-coated) High Speed Steel, the
added titanium nitride coating increases
the surface hardness to approximately
2300 HV and the heat resistance to
1100°F (600°C).
|
 |
Jobber Length Drill Bits
Jobber-length drills are the most common type of drill bit. The length of the flutes is ten times the diameter of the drill,
meaning they will drill a hole that is 10D deep. These high performance twist drill bits are
suitable for all normal drilling in conventional
materials. Available in High Speed
Steel and Titanium Nitride-coated (TiN-coated) High
Speed Steel, the added titanium nitride
coating increases the surface hardness to
approximately 2300 HV and the heat
resistance to 1100°F (600°C).
|
 |
Drill Bit Sets
Drill bit sets are available for step drill bit and jobber length drill bits. These convenient drill bit kits include:
- Three-piece Step Drill Bit Set - High Speed Steel, bright finish, spiral fluted with split point.
Drill bit size 1: 6 steps from 3/16" to 1/2" with 1/16" increments. Shank size 1/4"
Drill bit size 2: 13 steps from 1/8" to 1/2" with 1/32" increments. Shank size 1/4"
Drill bit size 3: 9 steps from 1/4" to 3/4" with 1/16" increments. Shank size 3/8"
- 21-Piece Jobber Length Drill Bit Set with fractional sizes from 1/16" to 3/8" in increments of 1/64",
in high-speed steel or Titanium coated (TiN) high-speed steel, 118 degrees point
- 29-Piece Jobber Length Drill Bit Set with fractional sizes from 1/16" to 1/2" in increments of 1/64",
in high-speed steel or Titanium coated (TiN) high-speed steel, 118 degrees point
|
 |
Machine Thread Taps
High speed steel (HSS) machine thread taps are available in nine sizes:
- 4-40 to 3/8-16 coarse UNC thread taps and 4-48 to 3/8-24 fine UNF thread tap sizes
- Spiral point, chamfer type B
|
 |
Metal Hole Punches (Electrical Knockout Punches)
Metal hole cutting tools include metal punches, die and draw bolt:
- (4) 22, 22.5, 30, and 30.5 mm pushbutton/pilot device mounting hole sizes
- (6) 1/2 inch to 2 inch mounting (trade) hole sizes
|
 |
New! ...
Multi-Purpose Hole Saws & Accessories
Ruko bi-metal saws have an alloy steel jacket and
cutting edges of either high speed steel or high speed steel Cobalt
8. Available in various
sizes from 9/16 inch (14 mm) to 8 1/4 inches (210 mm).
- High Speed Steel Saws
- High Speed Steel Cobalt 8 Saws
- Accessories - Arbor Holder Assemblies with Pilot Drill for HSS and HSS
Co8 Hole Saws and HSS and HSS Co5 replacement pilot drill bits
|
For more details, select the "Products" tab and click on the desired "Item Code", or select the "Technical Info" tab.
|
|
