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What is an h6 Tolerance?

1/11/2022

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Our last post about Lexington Cutter Offers h6 Shank Reamers prompted some questions regarding  what exactly is an"h" tolerance, so this post should help you understand it a bit more.
​
Let's start with a big picture and work our way down to the answer. The International Tolerance Grade, also known as IT Grade, identifies what tolerances a specific process  can produce for a given dimension defined in ISO 286.

​It establishes the magnitude of the tolerance zone or allowed amount of part size variation for internal and external dimensions.

​There are totally 18 grades of tolerance, the smaller the International Tolerance Grade number, the smaller the allowable tolerance zone, the higher the precision level.
ISO Tolerance Systems For Limits And Fits
The ISO Tolerance Systems For Limits And Fits. For more detail click on the image link.
"The ISO System of Limits and Fits is a coordinated system of hole and shaft tolerances for engineering and manufacturing used for cutting tools, material stock, gages, etc. If held to these tolerances, cutting tools, material stock, and gages are available throughout the world"1

ISO and ANSI both group fits into three categories: clearance, location or transition, and interference. Within each category are several codes to define the size limits of the hole or shaft - the combination of which determines the type of fit.2

Upper vs Lower Case
The tolerance symbol is established by combining the IT grade number and position letter for tolerance.  The first thing to understand is the difference between a capitol "H" and a lower case "h".  The upper case  "H" is used to designate bore tolerance while the lower case "h" is used to designate shaft tolerances. Tolerances with lower case “h” are (minus) negative.  Said another way, the capital letter "H" is for the hole, and lower case letter "h" is for the for shaft.

The Number
The number following the letter "h" denotes the International Tolerance (IT) grade. So, a tolerance with the number 6 will have a larger tolerance range than the number 5 but a smaller tolerance range than the number 7. This range is based on the size of the shank.

​A hole that has a 0.030” diameter will have an h6 tolerance of (+0.0000,-0.0002), while a 1.00” hole with have an h6 tolerance band of (+0.0000,-0.0005).
h6 Shank Reamer Tool Selector
Picture
Click the link below for a Shftt Tolerance Calculator.
Shaft Tolerance Calculator
1. Metric Standards for Worldwide Manufacturing, 2007 Edition Knut O. Kverneland 
2. Shaft tolerances are now covered in the new ANSI B32.100- 2005 standard
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Lexington Cutter Offers h6 Shank Reamers

1/5/2022

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lexington reamer h6 tolerance
Lexington Cutter, Inc., a Bradenton, Florida company, offers h6 tolerance shank reamers with flute long carbide tips brazed to one piece hardened alloy steel bodies.
​
​With polished flutes and material specific geometry and carbide grade for the ultimate in performance and tool life. Contact one of our team for your closest authorized Lexington Cutter distributor.
h6 Reamer Selector
REAMERS - h6 Shank Reamers
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High Performance End Mills vs. General Purpose End Mills

12/16/2021

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Guest Blog by Mark Donze at Fullerton Tool 
Fullerton Tool High Performance End Mills vs General Purpose End Mills
Have you ever wondered if you should purchase high-performance end mills or general-purpose end mills and what the benefit of purchasing one over the other is? If so, we have put together a list of factors to consider to help you make the right decision for next time.

General Purpose End Mills

First, let's discuss general purpose end mills. General Purpose (GP) End Mills are standard single, 2, 3, or 4 flute geometry end mills made for use in a wide variety of materials.

​Benefits of General Purpose End Mills:
  • Lower prices
  • Very versatile - they work in a variety of materials and applications
  • Typically easier to resharpen - general-purpose end mills can usually be resharpened by the user or by a local regrind shop, whereas a high-performance end mill typically will need to be sent back to the OEM for resharpening

High-Performance End Mills

Next, High-Performance (HP) End Mills contain specialized geometries for a specific material being cut.

Benefits of High-Performance End Mills:
  • Material and/or application-specific - This does not mean that an HP cutter will not work in more than the listed materials or applications. For example, our Fury end mill is recommended for a wide range of materials and applications and will cut almost anything and any tool path. So don't be afraid to experiment.
  • Better tool life, especially in difficult-to-machine Materials - HP cutters typically require less frequent tool changes and fewer offsets.
  • More adapted to high-speed machining or other advanced milling techniques.
  • Better surface finishes on your parts.
  • Usually have premium coatings that target a specific range of materials.
  • Typically have edge preps like hones or polishes that target a specific range of materials

With this information in mind, if you are a company that does small runs in a wide variety of materials you may prefer GP end mills. Whereas, if you are making high-volume parts where cycle-time and up-time are king, you may prefer an HP end mill for your use. Remember, there are no hard lines drawn. Each application is different and preference is ultimately up to you, the end-user. 

If you aren't sure, you can contact your Fullerton authorized distributor to help make this decision. We will work with you to get the end results you desire with a wide variety of both GP and HP end mills available.

We even have some tooling where we apply HP coatings to GP tools to help you get the most out of your cutting tool investments. We have a huge selection of inventory items and of course, if you need a special tailored tool to your specific needs, we have engineering and application knowledge to get the most out of your cutting tool budget.

We also have resources on our website to help you navigate which tool is the best for your needs. Discover what end mills are recommended for your material and application by using the Fullerton Tool End Mill Selection Guide 

You can also explore and search for tooling by material, application, or tool specs as well as 
 recommended speeds and feeds by series which you can access at the search button below.
Search
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Haimer is giving away 10 Rotary Toolholders with the Purchase of a PC SE Shrink Fit Machine!

12/6/2021

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Promotion Ends December 31 2021!
POWER CLAMP SPECIAL EDITION SHRINK FIT MACHINE PROMOTIONS
Haimer is the world leader in heat shrink tool holding technology. There is no better time than NOW to upgrade your shop to the precision of of a Haimer Power Clamp Special Edition shrink fit machine. This sale ends December 31, 2021! We are giving away 10 Basic Line toolholders with the PC SE Machine

For fastest tool change and highest process reliability
  • Precision with 100% repeatability
  • Fast tool changes - less than 5 seconds
  • Easy to use - tool changes at the touch of a button
  • Versatility - compatible with any shrink fit holder
  • Includes a $250 cutting tool certificate and 10 Basic Line Tool Holders
  • 1/8" - 1-1/4" Tool Holder capacity
Complete Promotion Info Here
This special promotion ends December 31, 2021. Please contact a member of our team for more information
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Haimer Universal 3D Sensor Now On Sale!

11/25/2021

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Promotion Ends December 31 2021!
The 3D-Sensor New Generation is a further development of our worldwide accepted and proven Universal 3D-Sensor.  With a cylindrical shank and clamping flat with a reading accuracy: 0.0004 in, it's also got improved mechanics and a new and compact design.

Both short and long probe tips are available with no tool change necessary because there is no re-calibration of the sensor needed and it has an enhanced overrun distance! It's ideal for Milling and EDM machines (isolated probe) as well as for work piece-reset and length measuring in any direction approach (X-, Y-, Z-axis). And it can withstand exposure to coolant because it's IP 67 water and dust proof!

The Benefits of the Haimer Sensor

No math needed
  • Zero on the indicator = Zero on the machine control
  • The sensor is pre-calibrated to incorporate the probe tip radius offset

3-Axis edge finder
  • Tram in your work piece
  • Check surface flatness
  • The indicator always faces the operator = No more reaching into the machine with a mirror

Quickly verify part dimensions
  • Part lengths, slot depths, hole diameters and more
Picture
See All the Haimer Specials!
Don't miss out on the opportunity to own the worl-famous Haimer 3D Universal sensor for only $466.00 - price good only until 12/31/21 or while supplies last. Contact a member of our team to answer any questions or to schedule a demo!
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Browne & Co Appointed Regional Managers for Haimer USA

11/10/2021

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Haimer USA Toolholders Shrink Fit Balancing Machines HSK CAT 40
Browne & Co  has been appointed as regional managers for Haimer USA.  Haimer USA is a family run company headquartered in the Villa Park suburb Chicago.  Haimer USA designs, produces and sells innovative, high precision products for metalcutting as well as for the automotive, aerospace, energy, rail and general machining industries.

HAIMER is best know for it's  large offering of rotary toolholders in all popular interfaces and lengths, as well as shrinking and balancing machines. HAIMER is a well respected brand for their 3-D Sensors and tool presetting machines. Their 30,000 sq ft Chicago headquarters is centrally located just a short distance from Browne & Co's territory which means that shipping and delivery times are quick! 

 Tool Holding Systems For Cylindrical Shank Cutting Tools
According to David Browne, President of Browne & Co.,

"Haimer USA's focus on high quality toolholders and toolholder set up equipment really meets the needs that we have in our marketplace.  We have seen increased demand to balanced high speed, high feed cutting tools increasing over the past decade. Haimer is by far one of the highest quality toolholder systems manufacturers in the world. Their shrink fit holders are what they are most known for but they also have a very robust offering of other rotary toolholders, balancing and presetting machines.  We are very excited to represent such a fine group of products in our region!"

Browne & CO. will represent Haimer USA in the the Kentucky, Ohio and Western Pennsylvania territories. For more information or to schedule a time for a free, on-site, balance test of your tools and check their balancing grades click the contact button below.

While we performing the balance tests, we often find the main reason for spindle damage and the source of vibrations.  Because the Haimer USA balancing machines have a flexible design, we can also balance rotors (impeller, fans, housings, etc.) grinding wheels and tools of all types.  

​Just ask us and begin profiting from the experience of our experts! Our knowledge is your advantage!
Contact us

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Standard Weldon Flat vs Advanced Performance Weldon Flat: What's the Difference?

10/13/2021

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Fullerton Tool, offers two types of Weldon Flats: The Standard Weldon Flat (WF) and the Advanced Performance Weldon Flat (AF)

They are essentially the same, but the length of the Weldon Flat in relationship to the cutting tool is different.

The Advanced Performance Weldon Flat (AF) is measured from the flute washout to the flat. This guarantees that the flute or flute washout will not be inside of the holder. If the flute or flute washout is inside the tool holder, the chips can pack into the holder and cause the tool to break.

Standard Weldon Flat

Single-WF-Weldon Flat
Double-WF- Weldon Flat
Standard Weldon Flat Table
Standard Weldon Flat Table

Advanced Weldon Flat

Single-AP- Advanced Weldon Flat
Double-AP-Advanced Weldon Flat
Advanced Weldon Flat Table
Advanced Weldon Flat Table
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Turn Your Standard 6" Milling Vise Into A Double Vise in 5 Minutes!

9/27/2021

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Do you have 6" Milling Machine Vises in your shop? Would you like to double their productivity in 5 minutes for under $400? Of course you would!

Introducing S&R Products out of Valencia, Callifornia!

S&R Products was founded on the principal of building strong and reliable tools for the manufacturing industry.

All of their products are built in the USA by aerospace machinists using the highest quality materials. Watch the short video below to see how you can start doubling the productivity in your shop in minutes!
Contact Browne & Company today to see all of S&R Products high quality products in your shop today! Click on the button below to see the S&R Products full offering brochure
S&R Products

Read More
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Ergo ER Taper-shank Indexable Cutters Made for Driven Tools on Swiss CNC Lathes

9/15/2021

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Ergo indexable milling spotting chamfering cutter
"Ergo" is a new trademark of Nine9 for ER type indexable cutter. The cutter is assembly kit by the 3 parts including Ergo nut, high strength Ergo pin and Integrated ER taper. Patented design mechanism to produce high clamping Forces and high runout accurancy.

It's perfectly suitable for driven tools and spindles with ER interface of CNC turning centers and swiss type automatic lathes such as Star, Citizen, Tsugami, Doosan, Tornos, INDEX, EMAG and so on.

​The Ergo provides types ER11, ER16, ER20, ER25 taper-shank cutter. The ergo tooling include milling cutter, spot drill, chamfering tool, corner rounding, engraving tool, deburring tool, center drill and boring tool.
The fundamental concept of an ERGO integrated ER taper/shank cutter is to eliminate the assembly tolerance associated with a straight shank.

A clamping force from the 3 parts including Ergo nut, a high strength pin and ER taper. The Ergo nut drives the pin to Ergo holder into ER taper both positioning and locking everything accurately in place.
Ergo Monoblock milling cutter

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Introducing PIM - Products In Motion

9/8/2021

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Stop going back to your machine tool manufacture to order replacement wear parts like bellows, way covers, steel cover replacement wipers, way wipers, etc. You are paying WAY too much and waiting WAY too long.

​Introducing PIM - Products In Motion out of Rock Falls, Illinois. With over 40 years of manufacturing experience, the PIM team is dedicated to producing the highest quality product and providing the best service in the nation.

Contact the Browne & Company team for more information, or click the button below.
PIM Line Card
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