1. How do I
contact Onsrud cutter for technical advice?
2. Does Onsrud
manufacture custom router bits?
3. Does Onsrud
cutter offer metric size tooling?
4. Does Onsrud
cutter re-sharpen router bits?
5. When is it
time to have a tool re-sharpened?
6. What is the
major cause of tools becoming dull?
7. What is
chipload and why is it important?
8. What is the
recommended feeds and speeds when utilizing a CNC router?
9. When
utilizing the feed and speed data, the end-user should keep these thoughts in
mind?
10. Does Onsrud
cutter provide a tool selection guide?
11. Does Onsrud
cutter provide on site assistance to end-users?
12. What if I
need assistance before the regional sales manager can visit?
13. What is
Onsrud cutter's approach to high speed machining of aluminum?
1. How do I contact Onsrud cutter for technical advice?
Contact Onsrud at 800-234-1560
or techsupport
2. Does Onsrud manufacture
custom router bits?
Yes, Onsrud is an industry leader in the manufacture of solid carbide custom
router bits.
3. Does Onsrud cutter offer
metric size tooling?
Yes, Onsrud offers a broad line of metric sized tooling.
4. Does Onsrud cutter
re-sharpen router bits?
Yes, contact your distributor for
pricing.
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5. When is it time to have a
tool re-sharpened?
When the cutting edge becomes dull. Some
things to look for are:
- Surface finish quality will
decrease
- Amount of horsepower necessary to
cut will increase
- Noise level may increase
6. What is the major cause of tools becoming dull?
Heat is the major reason tools break down and become dull. To reduce the amount
of heat, increase the chipload or reduce the RPM. This will keep the heat in
the chip and remove it from the part. After a cut, the tool should be cool to
the touch.
7. What is chipload and why is
it important?
Chipload is the actual thickness of chip
that is produced in the machining process. Chipload is measured in thousandths
(i.e.: 0.010) and is influenced by the spindle speed and the feedrate of a CNC
machine. The number of cutting edges on a router bit determines how the
chipload is divided. A single edge tool takes all the chipload during a
revolution, while a double edge tool divides the load over two edges. Chipload
is an important factor in tool life because it dictates how much heat will be
carried away from the cutting edge. Better heat dissipation directly relates to
increased tool life. The formula for determining chipload is:
chipload= feedrate/(rpm x #cutting
edges).
8. What is the recommended
feeds and speeds when utilizing a CNC router?
Onsrud cutter provides recommended feed
and speed data in the catalog and on two web sites at www.onsrud.com and
www.plasticrouting.com.
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9. When utilizing the feed and
speed data, the end-user should keep these thoughts in mind?
When fine tuning a CNC router:
- Start at the low end of the
feedrate recommendation
- Use the feedrate override to
increase feed rate until:
The edge finish deteriorates because of tool
chatter
The machine defaults to a slower speed due to tight
radii
The part moves or is pushed off the vacuum
- After the maximum feed is
determined, lower the spindle speed until the edge finish once again
deteriorates. At this point, adjust the spindle speed higher until the finish
becomes acceptable. By adjusting feed and spindle speed, maximum productivity
and tool life has been reached.
The feed and speed data on the plasticrouting.com
website is relative to types of plastic and is much more specific in terms of
actual feedrate and expected finish on a machined part. The site was designed
under the assumption that finishes at reasonable productivity was most
important. With that though in mind, end-users could assume higher feedrates
are possible, but with diminished results in terms of finish.
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10. Does Onsrud cutter provide
a tool selection guide?
This information is readily available in the catalog and on www.onsrud.com and
www.plasticrouting.com. Also, Onsrud cutter, as a part of their on-call service, has
regional sales managers and in-house technical specialists to assist in tool
selection and arriving at proper feeds and speeds to maximize the productivity
of the tooling. These valuable resources guarantee the end-user will select the
right-tool-for-the -job.
11. Does Onsrud cutter provide
on site assistance to end-users?
Yes, this is a major part of the Onsrud cutter on-call service. Basically, the
regional sales manager will visit an end-user site by appointment to determine
the right-tool-for-the job. They bring years of experience and knowledge along
with a tool box to actually demonstrate how various Onsrud cutter tools will
affect the productivity of the operation in a positive way.
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12. What if I need assistance
before the regional sales manager can visit?
Most times, the regional sales manager from Onsrud cutter can make
recommendations via telephone, e-mail or other correspondence until they can
make a follow up visit. Also, Onsrud cutter has an on-going training program
for their network of distributors and many of these distributor sales people
are very well versed on the critical factors relative to sound routing
techniques. The web site lists these valuable distributors.
13. What is Onsrud cutter's
approach to high speed machining of aluminum?
Onsrud cutter is no stranger to the machining of aluminum. They have been
providing router tooling to the aircraft and related industries for over 75
years. The biggest change in recent years has been the type of CNC machining
centers found in the major aluminum fabrication shops throughout the world.
With demands on increased productivity, the spindle speeds of these machines
has steadly been increased to 8,000 rpm's and above and the shearing action of
router type tooling provided by Onsrud cutter is more appropriate than the
bludgeoning process afforded by endmills. The use of router tools negates the
need for climb cutting and finish passes relative to endmills and places the
aluminum fabricator into the realm of conventional cutting with better
productivity and finish. Because of Onsrud cutter's long history of success in
high spindle speed environments, there is no better place to go for solid
carbide tooling designed for such use.
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