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High Torque Retention Knobs Help Job Shops Achieve At Least 10% Increase in Toolholder Productivity

JM Performance Products president John Stoneback believes typical CNC milling shops are running their machines 20-40% slower than they should be. To change that, he offers a solution that is low risk with high ROI. The company's patented High Torque retention knobs enable machines to run faster with reduced chatter, less vibration, and tighter tolerances.

Despite of the addition of over 750,000 CNC mills put into service in the past 15 years in the US, CNC machining job shops often hover at the bottom of the totem pole where there's little room for error -- as most bids are won by a 1-2 percent price variance. Representing the backbone of the US machinery resurrection, most low-to-mid volume run production machine shops struggle in achieving their share of the 5-10 percent maximum profit margins typically realized on most jobs.

JMPP's Patented High Torque retention knobs overcome a key design flaw inherent in CNC v-flange tooling; eliminating the toolholder expansion responsible for costly and ongoing CNC milling and boring issues.

 

 

 

 

Ultimately, being better and faster keeps costs lower while raising the bar on potential profits. The ability to quickly adopt new machine tool technologies and cutting tool strategies becomes paramount to the overall success equation for today's machining job shop sector.

High Torque Retention Knob Offers Competitive Edge

An example of a quick, simple investment a job shop can make starts at the spindle according to JM Performance Products, Inc. (JMPP: Fairport Harbor, OH). The company asserts that their patented High Torque retention knobs can overcome a key design flaw inherent in CNC v-flange tooling, eliminating the toolholder expansion responsible for costly and ongoing CNC milling and boring issues.

JMPP, a manufacturing innovator of CNC mill spindle optimization products since 2009, designed the knobs to be used in existing toolholders to eliminate the bulge at the small end of the holder, which stops it from making full contact with the taper of the spindle.

By increasing contact with upwards of 70 percent more spindle surface, a wide range of CNC milling issues are overcome including: vibration and chatter, poor tolerances, non-repeatability, poor finishes, shortened tool life, excessive spindle wear and tear, run-out, and shallow depths of cuts. Since tight tolerances are essential in high-speed machining, if the toolholder doesn't fit the spindle precisely, decreased productivity and reduced tool life are inevitable.

According to JMPP President, John Stoneback, "Bridging this gap of missed productivity can conservatively help job shop operations achieve a 10-20 percent competitive advantage per hour via faster set-ups, better feed rates, and more rigid tools -- reducing tooling cost by 20-50 percent or more. In essence, every tool on the machine works better and faster to make job shops more competitive and increase profit margins dramatically."

The fact is, all US manufacturers will have to bundle more technology in their products to compete -- at home and globally. The power of combining lean manufacturing with modern technology is even more important to today's small-to-medium job shop where everyone is competing for the same work. The positive short-and-long term effects of optimizing production methods with JMPP's High Torque retention knobs can help shops realize their full potential with a low risk/high return ROI ratio.

According to JMPP Plant Manager, Craig Fischer, "A small advantage in labor hour savings alone can help impact a job shops' leverage in getting the job. With payroll hours reduced and machine hours freed up, the collective ability to get more work goes up. Additionally, everyone's tooling budget keeps going up as the cost of buying carbide from China increases. Factoring in a conservative savings on carbide tooling costs of even 5 percent when using our knobs is significant, as all of these value-added factors collectively add up in a job shop winning more work in today's competitive climate."

Key Design Elements of JMPP's Patented High Torque Retention Knobs

Longer than traditional retention knobs, with a precision pilot to increase rigidity, a relief below the flange forces threads into a deeper cross section of the toolholder. The knobs are hard turned to ensure precision fit, and are balanced by design with threads cut to start and finish 180 degrees from each other. The High Torque knobs will work in existing toolholders.

Eliminating toolholder expansion increases spindle contact and reduces downtime and a variety of costly production issues like fretting and tool taper damage.

 

 

All JMPP retention knobs are manufactured and material sourced in the United States and made from hot rolled, 8620H or 9310H Fine Grain Steel. H13 tool steel is also available upon request. They are shot peened to relieve stress, and hard turned for superior fit-and-finish.

Enterprise Welding and Fabricating, Inc. (Mentor, OH)

Founded in 1975, Enterprise is a family-owned metal fabricator specializing in sheet-metal fabrications with high quality, cost-effective core component parts for large OEM companies with a heavy trucking and agricultural focus.

In 2017, Enterprise purchased two new DMG MORI machines (CMX 1100 & NHX 6300) which required a quick, full tool-up conversion to JMPP High Torque knobs -- 30 for the CMX and 60 for the NHX. Notably, the NHX machine leveraged a higher strength version of the knobs since it was a bigger machine.

According to Enterprise Manufacturing Engineer, Bob Ludwig, "We needed to get these machines up in one day and JMPP came out and filled the order with our Applications Engineer on site. These were new machine investments and the previous knobs and toolholders we used had bulged in the past, so we didn't want to go down that path again. The assembly was simple, and we've used the knobs for over six months with high efficiency and no problems."

Olson Custom Designs (Pittsboro, IN)

Established in 2014, OCD was founded by two brothers, Mitch and Brian Olson. With CNC Machining being the backbone of OCD's custom machining and fabrication operation, the family-owned job shop services a myriad of industrial markets including: Aerospace, Medical, Motorsports, Agricultural, etc.

OCD Owner, Mitch Olson, was seeking out the best tooling solutions to push their 2 mill, 4-and-5 Axis milling machines to the limit. After some initial product demonstrations, Olson decided on JMPP's High Torque knobs and has never used anything else since.

According to Olson, "We've got the machines to handle nearly any material, and run size, and any complexity so the job will be done right every time. There's a lot of money invested in the tooling and JMPP's knobs provide better overall finishes, require less hours, and shorter runs for us as a job shop."

Conversion Productivity Index

The previous CNC machining job shop profiles are prime examples of conversion success on a variety of levels -- spanning a myriad of diverse market applications including automotive, aerospace, medical, etc. Larger manufacturing entities have also been achieving similar results by adopting and implementing JMPP's patented High Torque retention knobs to meet and exceed the ever-changing requirements of CNC milling.

DMS Machining Systems has implemented well over 300 of JMPP's High Torque style knobs in service for 2 vital machines because the tool holder tapers and machine spindles last longer and deliver overall better performance and part quality.

 

 

 

 

An increasing number of today's job shops are performing machine tool monitoring in some way to analyze everything from managing tooling for jobs, scheduling jobs, configuring production, and daily rates. To aid job shop and manufacturing entities in identifying key cost analysis in converting to the High Torque knobs, JMPP offers a free ROI calculator which can assist them in determining their annual projected savings. It starts with a simple equation -- at a conservative minimum of 10 percent productivity increase using the High Torque knobs vs. conventional knobs, how would it affect the health of your company?

Expanding on this, Stoneback stated, "Take the number of mills in your shop and multiply that times the number of hours per day you run. Now take that number and multiply it by the number of days per week that you're running the mills. Multiply that number by your hourly billable rate. Now multiply that number by 52 weeks. The number you calculated is your unadjusted yearly revenue. Now, take that yearly revenue figure and multiply it by 10 percent -- that's the number that represents your annual lost revenue."

Stoneback provided a simple example, "1 mill x 8 hours per day=8 hours; 8x5 days per week=40 hours; 40 hours x billable rate of $100=$4,000/per week; $4,000 x 52 = $208,000 annually. $208,000 x 0.10=$20,800 lost revenue per year."

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