What is the difference between Rotary Hammer bits and
Rotary/Percussion bits?
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?
We can supply 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 Hammer Core (or Hard
Head) bit?
Once hammer core (or Hard Head) bits have been used, the
tapered shank cannot be removed by conventional means. For shank replacement,
return to where they were purched for factory service
