Milling Inserts

 

Broadly used in holes processing, boring bars are a kind of component assembled to boring bits broaching holes that have already been preliminarily
drilled and improve hole diameter accuracy. They consist of solid shank and a
coolant hole in it.

If you happen to be familiar with long overhang machining, probably you also have been haunted by an underlying problem that all single-point cutting tools
with long shank can't skirt around, which is vibration, or so-called
chatter.

Contents hide 1Main reasons that cause machining chatter 2Why is reducing chatter so vital to drilling process? 3Are there some other solutions
to fix the problem? 4How does it profit you if your boring bars are made of
carbide? 5Under what circumstance should carbide boring bar be applied? 6Why
choose Mcct? 7Product description 8Instruction of use 9What's moreMain reasons
that cause machining chatter

Length of it exceeds 125mm,

Its rotating rate per min is too high,

Loose clamping of tool or workpiece.Why is reducing chatter so vital to drilling process?

At present, in internal hole processing, ratio of length-to-diameter of a boring bar extension is generally less than 4:1. Once the ratio is more than
that, the tool body will vibrate violently, resulting in poor tolerance of
machined hole that can not meet requirements of product surface
roughness.

Are there some other solutions to fix the problem?

Yes, basically veterans try the following 2 tips to alleviate chatter,

Choose Cemented Carbide Inserts with a smaller cutting edge angle. It will improve the whole tool's performance of heat dissipation as well,

Either lower feed rate or rotating rate of the spindle.

Nonetheless, you will find it still hardly improve the accuracy of machining due to limited cutting parameters. It inevitably moderates the metal removal
rate per unit time.

That' s why we suggest you solve this problem from the ground up. For clients from the industry of tool fabrication, we recommend carbide boring tool holders
(tool bit excluded) available in our stock. Boring bits assembled on it
efficiently are allow to enhance its capability against disastrous processing
result caused by vibration and cutting heat. Tool bit can be tightened by being
screwed with threads carved in its shank's internal hole. How does it profit you if your boring bars are made of carbide?

It's easily for low carbon steel to reach required rigidity of external turning tool and end face turning tool cause their overhang part out of spindle
is generally not be too long. Whereas all boring bars have to be designed as
slim as possible for readily protruding into machined hole in the long-reach
application. They are way more vulnerable versus other types of lathe bars
bearing chatter. Manufacturers have to develop suitable materials on that
purpose, e.g. carbon steel, tungsten alloy, and carbide.

Under what circumstance should carbide boring bar be applied?

As we mentioned above, the length-to-depth ratio is a critical factor to affect what material to be used in the fabrication of a lathe boring bar.
Steel carbon allows a 4:1 ratio, and tungsten alloy allows ratio of more than
4:1. Carbide is one of those optimal solutions for those boring bars in ratio up
to 8:1 thanks to carbide's high rigidity.

Why choose Mcct?

Please save your time sourcing manufacturer with design ability and full production line.

As an enterprise that has been in the business of carbide parts and produced them for 11 years. We are able to assure you that all parts are made in our
wholly-owned factory operated under the instruction of ISO 9001. Sufficient
expertise is obtained by us to tailor a series of carbide products for meeting
requirements from our clients.

Product description

There are 3 types of boring bars you could find in our store. They are ST(standard), CL, and CN.

As shown in the following chart, we've made a list of common ST type boring bars. You could check out if there happens to be certain one of size that you
need. Otherwise, please just contact our service personnel for all detailed
info. L(mm) D1M10084.5M4 80-150 10 5.5 M5 100-200 12 6.5 M6 100-200 15 8.5 M8 100-200 15.6 8.5 M8 100-250 16 8.5 M8 150-250 19 10.5 M10 100-250 20 10.5 M10 150-300 24 12.5 M12 150-300 25 12.7 M12 200-400 32 17M16Instruction of use

Please pay attention to the limitations of the depth-to-length ratio. Boring bar will get broken If the overhang part of shank scales out the limitation.

Reserve enough space for flushing the swarf, which means you should choose a boring bar with a suitable size according to the diameter and depth of the
machined hole

If encounter problem about our products that you can't figure out, please contact us directly or the agency where you purchase the item.

What's more

We will launch solid boring toolbars and V-shaped welded boring bars in the near feature. Please subscribe to our blog you will be updated with more product
details and tips of operating. We genuinely hope our insistence on the highest
of standards of products we provide is able to convey the enticing values the
tool manufacturer has to offer and impress you someday.