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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:

1. The edge finish deteriorates because of tool chatter
2. The machine defaults to a slower speed due to tight radii
3. 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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