What is the difference between Rotary Hammer bits and Rotary/Percussion
Rotary/Percussion is used in light duty applications.
The speed range is 1300-3500 rpm at up to 50,000 blows per minute
(bpm). The impacting action created by the drill motor fractures the
concrete into tiny granules.
Rotary Hammer Bits turn much slower (400-1000 rpm, 4500 bpm) and hit
much harder than Rotary/Percussion. Generally, hammer bits cut much
faster than percussion bits.
Do Rotary/Percussion bits cut faster than Rotary-only bits?
Yes. Rotary-only bits do not break up the concrete,
but actually grinds it under operator pressure.
What is A.N.S.I.? Relton Corporation follows
A.N.S.I. standard B212.15-1994 where applicable. This standard was
developed to insure maximum holding power of concrete anchors by matching
drill tolerances to anchor dimensions. For more information on A.N.S.I.,
visit their home page, ansi.org.
How do I cut a hole 10" deep if the core-bit
I'm using only has a 4-1/2"
depth of cut?
Relton supplies extra-long shanks
for deep drilling into concrete for 7/8" - 5" core bits. We also
supply extra-long core-bits for those core-bits with non-removable
shanks. The extra-length allows
for a deeper reach into the hole. In order to drill deeper than the
core allows, you must break out the core every few inches.
How many holes can I drill into concrete using a Relton bit?
This will vary dependent on many factors. The PSI
of the concrete will be a factor, along with the hardness of the aggregate
in concrete. Aggregate hardness varies from locale to locale (even
in the same state!). Florida has some of the softest aggregate, while
Louisiana has some of the hardest. See the Aggregate
Map of the United States for details. Other factors that need
to be considered are operating conditions and the type and style of
the bit being used.
I broke the carbide (or body) on my hammer bit. Can it be repaired?
Yes! We offer a factory
service for all Relton carbide products. Single-insert masonry
bits can be remilled, sharpened or have the carbide replaced. Cross-Top
and multiple-cutter core bits cannot be remilled, but can be sharpened
and the carbide can be replaced.
How do I remove the shank from a Relton Hammer Core (or Hard
Once Relton's hammer core (or Hard Head) bits have
been used, the tapered shank cannot be removed by conventional means.
For shank replacement, return to Relton Corporation
How many holes can I drill when using a Relton rebar cutter?
This depends on the size of the rebar being cut
in relation to the diameter of the rebar cutter. The less steel that
needs to be removed, the more holes you can drill.
A 1/2" rebar cutter drilling through # 6 rebar (3/4") may only result
in 5-10 holes drilled if the rebar is hit dead center of the hole.
If the rebar is off center where you are only removing a small portion
of steel, you should see more holes cut before the rebar cutter needs
How will I know if I hit rebar?
The sound of carbide hitting steel is higher pitched
than when cutting concrete with a hammer bit. If you hit rebar, immediately
remove the hammer bit from the hole and use a rebar cutter.
Will a rebar cutter enlarge my existing hole?
No. Relton rebar cutters are manufactured with the carbide cutters
brazed in place to keep this from occurring.
What is the carbide kerf on Relton hole saws?
.130" (approx 1/8").
Can the carbide teeth be sharpened or replaced?
Yes! See our factory service page
How many holes can I drill when using a Relton hole saw?
Relton offers 8 different styles of saws for different applications and these saws are professionally designed for production work. There are many factors that need to be considered: material, speed and feed, diameter and depth of cut, etc, but in many applications, Relton saws will outlast high-speed and bi-metal saws between 50-1 to 200-1! Remember, Relton hole saws have carbide teeth brazed into the body wall that can be resharpened or replaced as needed.
I don't see the size (or depth of cut) I am looking for. Can
you make a special size?
Yes! We can manufacture hole saws to your specifications. We will
even build just 1 saw if that is all you need. Ask us for a quote today!
Fluids & Oils
What is the difference between TCO-14 (Dark) and TCO-16 (Light)
Thread Cutting Oil?
TCO-14 and TCO-16 are operationally interchangeable. The only obvious
difference is the color.
Are MSDS available for Relton products online?
Yes! MSDS for all of our chemical
products are available in PDF format.