Browse by Editorial Category
Browse by Edition Date

September 2019

Skip Navigation Links.
Expand Applying TechnologyApplying Technology
Collapse Current NewsCurrent News
Allegany Capital Corp Acquires CID
First Autonomous Mobile Robot Conference September 17
Distribution Summit 2019 to be Held September 11-12 in Detroit
Applied Manufacturing Technologies Achieves FANUC Growth Award
AMT MTForecast 2019 in Cleveland October 2-4
API Acquires Exact Laser Measurements
Applied Motion Products to Construct New Headquarters in Silicon Valley
Chief Engineer Keynote Speaker at the ASSEMBLY Show Registration Now Open
Graduates from Autocam Medicals CNC Machinist Apprentice Program
Bilsing Automation Relocates North American Facility
Miniature Circuit Breakers
COE Upgrades Press Feed Controls at Wellington Industries
Flexible HVAC Fabrication Line
Concept Machine to Host Open HouseSteakFest 2019
New Metrology Software Functionalities Displayed at Exact Metrology Open House
GF Machining Solutions Announces Distributorship Changes and Expansions
G.H. Tool and Mold Achieves Boeing Gold Supplier Performance for Eighth Time
HELLER Machine Tools Partners with Maruka USA (North East)
High Torque Retention Knobs
Redesigned SM Series Rotary Screw Compressors
Mahr Inc. Opens Midwest Regional Customer Center in Wixom MI
Makino Hosts 3-Day Technology Expo
Mark IV Capital Acquires 4300 Acres of Industrial and Commercial Land
Personal Air Breathing Unit
Mastercam Education Summit 2019 Featured Collaboration and Access to Training
Mazak Announces Dates for DISCOVER Manufacturing Event
New Sinker Technology at MC Machinery Systems Open House
MC Machinery Systems Announces Technical Training Event September 10
Gottstein Corporation Invests in New Equipment
Mitsubishi Electric Automation Launches Redesigned Mobile Showroom
Mitsubishi Electric Automation Inc. Announces Platinum Sponsorship of GCAMP
Future-Oriented Automation and Transport System
Motion plus Power Technology Expo Announces MPT Conference
Prototek Acquires CAL-X
Grippers Assembled in the USA
Sciaky Enters RandD Initiative with Aubert and Duval and Airbus
Large-Diameter Dark Field Washdown Ring Light
Raptor-Ready Dovetail Blanks Eliminate Material Prep
Techni-Tool Completes Acquisition of MDM Tool Supply
Universal Robots Launches Authorized Training Centers
United Tool andamp; Machine Acquires B.G. Peck Company
The Volvo Group Announces New Jobs in Pulaski County Expansion
Wedin International Purchases PGM Products
WESTEC to be Held September 24-26
Expand EMO Product PreviewEMO Product Preview
Expand Energy ManufacturingEnergy Manufacturing
Expand People In The NewsPeople In The News
Expand Quality ControlQuality Control
Expand WeldingWelding
Expand WESTEC ExpoWESTEC Expo
Expand WorkholdingWorkholding

show all editions →

Click here to watch Tutorial Videos >

SST ConsumablesSST ConsumablesIscarIscar

High Torque Retention Knobs



Approximately 95% of gun parts are manufactured by milling. Tool life is vital to keeping up with production cycle optimization. Therefore, more advanced, rigid machines are being leveraged with the highest grade and exotic materials to overcome associated tool life problems.

One constant challenge to tool life is chatter (or, vibration), which corresponds to the relative movement between the workpiece and the cutting tool. "The condition not only causes poor finishes on the parts, but can damage and significantly reduce the life of end mills," said a JM Performance Products (JMPP), Inc. spokesperson. "Carbide end mills are particularly susceptible to damage. Poor fixturing, workholding and machine maintenance all contribute to chatter and its associated problems. Chatter in cavity milling also creates uneven wear on cutting tools and shortens tool life-rendering it to be self-sustaining until the problem is corrected."

Recently, Evolution Gun Works, Inc., a designer and manufacturer of parts and accessories for rifle and pistol models, had been experiencing significant chatter on its machining centers. EGW principals wanted to eliminate the potential for poor surface finishes on parts (which would require secondary bench operations) and critical damage to expensive workpieces.

To address these issues, EGW President and Founder George Smith investigated converting from standard off-the-shelf retention knobs to a specific high torque retention knob from JMPP. After a demonstration, Smith believed the theory behind the patented knobs was solid, and would resolve improper seating of the toolholder in the spindle that results from toolholder deformation. Essentially, if the toolholder does not fit the spindle precisely, a critical "loose-tool" factor occurs that can create the perfect storm for chatter, poor tool/spindle life and decreased productivity.

"Investigations of vibration and chatter issues point to this improper seating of the toolholder in the spindle because when a standard retention knob is tightened, it can produce a bulge in the taper that prevents full contact and correct seating in the spindle," said the spokesperson. "As a result, the toolholder is unable to pull completely into the spindle, and contact is made at the small end of the holder instead of at the large end at the gauge line."

JMPP's patented knob design is longer and reaches deeper into the cross section of the holder's threaded bore. "As a result, all thread engagement occurs in a region of the toolholder where the cross-section is thicker to resist deformation. A precision pilot increases rigidity, the knobs are hard turned to ensure precision fit and are balanced by design with threads cut to start and finish 180° from each other," said the spokesperson. The high torque knobs work in existing toolholders.

EGW manufactures gun parts and accessories that use high-grade exotic materials including 410, 415, 420 and 17-4 stainless steels; 4140 and 4340 tool steels; 7075 and 6061 T6 aircraft-grade aluminum; and Tungsten guide rods.

EGW converted all of its CNC mill operations to JMPP's high torque retention knobs. According to Steve Seaman, EGW's CNC Shop Foreman, "The knobs were easy to use and we saw the effect instantly. We would run an end mill and have chatter, then change to the JMPP high torque retention knobs with the same lot of material, same coolant, on the same machine, with no chatter. The resulting surfaces are now consistently smooth with no imperfections."

Eliminating chatter also reduces wear on cutting tools and machining centers, minimizing machine downtime. This is essential, since tool life is key for firearms manufacturing where demanding requirements of materials like stainless steel is prevalent. The end product is easier to clean and not effected by gun powder residue. Military applications are using these less corrosive exotic materials because the discharge's high flash/burn powders do not affect them.

JMPP President John Stoneback stated, "The total system remedy is to eliminate all vibration sources that can lead to harmonic responses. Run the job on the `tightest' machine available. The more the machine's engineering and spindle are tight and robust, the less chatter will occur. Less expansion in the toolholder helps the most on longer tools and run-out as well as chatter. Our high torque retention knobs are at the forefront of closing this productivity gap, and can help milling operations conservatively achieve a 10-20% competitive advantage."

JMPP Plant Manager Craig Fischer also noted EGW's savings on polishing with high torque, or lower-deformation, knobs: "Milling producers can achieve upwards of 14 times the savings on polishing by using JMPP's knobs," he said, citing an example where the process takes 2 minutes vs. 28 minutes for standard knobs.

For more information contact:

JM Performance Products, Inc.

1234 High Street

Fairport Harbor, OH 44077

440-357-1234 / 800-322-7750 

sales@jmppinc.com

www.jmperformanceproducts.com

< back