Author Archives: Jeremy Kirkpatrick

Acme vs Trapezoidal Threads

Acme vs. Trapezoidal Threads – What’s the Difference?

Acme threads appeared sometime in the late 1800’s, as an improvement on the square thread form. Square threads were the first choice for motion transfer and heavy loads. But, square threads were difficult to produce with available cutter technology. Although the square form was relatively efficient for the purposes required, it was inherently weak at the base of the thread due to the sharp 90-degree angle of the flank. Modifying the included-angle to 29-degrees widened the base of the thread making it stronger. Over time, standards in Acme diameters and pitches were established, all with Imperial Inches in diameter and Threads-per-Inch units of description.

 In Europe, similar standards followed using metric units of measure, and the slightly different included flank angle of 30-degrees. Metric standard trapezoidal threads are covered under DIN103. Diameter and pitch descriptions are in metric units of measure.

                            Acme Threads

Acme Threads

                              Trapezoidal Threads

Trapezoidal Threads

Both thread forms serve the purpose of producing linear motion when rotated, usually under heavy load. Some common uses include; lead screws for linear actuation on CNC machinery, table lifts, clamps and vises, valve stems, medical diagnostic device drives, trailer jacks and jack-stands. The American Acme form has an included flank angle of 29-degrees. The metric Trapezoidal thread is at 30-degrees. The uses for these thread forms are essentially the same. In fact, taking manufacturing tolerances allowed into consideration, they may be interchangeable when TPI (threads-per-inch) is the same.

 The demands placed on the tools that produce these threads are higher due to the amount of material being removed, per tooth, in the process. Controlling “chip-load” is critical. In order to design a tap for these threads, North American Tool requires specific detail on the application. Information on the material being tapped, tapping depth, condition of the hole (through or blind), and Class of Fit, is essential to engineer the proper tap. General purpose taps are available, but are definitely not suitable for every application.

So what’s the difference between Acme and Trapezoidal? Not much physically. Although the American Acme thread-form is used and accepted throughout the world, the choice of which to use is usually dictated by the origin and user destination of the finished part. To that manufacturer, the difference is everything!

 

Tags: AcmeThreadsTrapezoidal

North American Tool is a tier 1 manufacturer of special taps and dies with many taps having a 24hr lead time. Call us today for a quote!!

Grinding Wheel Productivity

We posed the following question on social media last week and have John Thompson of Pferd to thank for a fantastic answer!!

“4-1/2, 5″, or 6″ what is your favorite size grinding and/or cutting wheel? Jumping from 4-1/2 to 5″ is an easy way to get more bang for your buck with your existing grinder but will a 6″ wheel justify the cost of a new grinder?”

We asked John Thompson of Pferd USA to use his technical expertise and many years of experience running abrasives to answer this questions for us. Though John works for Pferd, this information is applicable across all brands and industries. We really appreciate John spending the time to put this information together for us!! Without further delay, here is his answer to our question…

Improving Productivity and Performance in Grinding and Cutting

Being competitive in any fabrication process requires a continuing process to improve productivity and reduce labor costs. You may have found the right formula for bending, shearing, welding and material handling to reduce labor and improve process flow to keep the bids low and the work coming in. As these improvements can be very expensive a lot of thought goes into the type of product and overall cost. Long term savings are often the result from a logical investment in the math required to determine the return on any investment and the overall payback time from lower labor and material costs. This is how a fabricator stay competitive and keeps the team invested in the company growth.

But some of this savings can be lost when the productivity of grinding or cutting for preparing material for welding or cosmetically finishing material for paint or powder coating is left up to antiquated equipment or ideas about the difference between Price and Cost when it comes to abrasives. This is NOT a discussion about different grades of Bonded or coated abrasive product. That subject has been beat to death by every abrasive supplier with new grain or new special formulas that promise faster grinding and longer life. THIS IS a discussion with a simple math lesson on improving productivity and reducing overall costs based on the extra life of a slightly larger diameter product.

This is a simple look at the increased performance and reduced costs for applying simple math to improve the volume of material going through the fabrication process and shipped to the customer as a finished product i.e. “Payday”.

There are two false ideas that must be addressed.

One: that the shop worker doesn’t care about getting their part of the job done on time and with minimum effort on their part. They do care as they need that job and the pay it offers to live. The faster they can complete a task with minimal effort means they can move on to the next task and complete the job on time so everyone can be paid and secure that the company is competitive.

Two: Constantly applying pressure to a supplier of consumable product such as abrasives, weld wire, band saw blades and other consumables will make the company competitive even if they do not change the process of grinding prep or finishing procedures. This false idea that high consumption of cheap or small diameter product based on price will offset lost productivity and allow a company to be more competitive. It is the Labor to use the abrasive NOT the Price of the abrasive.

  So how can we improve operator productivity and reduce labor costs to keep some of the lost money due to old process issues? Look at the interaction of RPM, Diameter and power tool Weight to work Faster NOT Harder.

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Oil and the State of Small Business

    As oil prices struggle to climb above $50/barrel and price stability seems to be anything but a reality, how do we plan for success in the current economic environment? The article below, published on FoxBusiness.com points to optimism in the market due to the lowering of crude inventories and the expectation that OPEC will extend their production cuts through the end of the year. But, is optimism enough to keep a business afloat? After 2 years of being hammered by poor oil production and now going into a third year of marginal growth now is the time to step back from your business, take the 20,000 ft. view and decide what you need to do to become or stay profitable! If you have already done this, great!! you are ahead of the pack. If you are sitting around waiting for the economy to right itself I’ve got 3 quick “projects” that you can tackle to start being proactive instead of reactive in your business.

 

  1. Read “Simple Numbers, Straight Talk, Big Profits” by Greg Crabtree. If you are new to P&L statements or business finance this short, easy to read book will get you up to speed quickly so you can make decisions on facts and your gut instead of your gut alone. (I’ll give a copy of this book to the first 2 people who comment asking for a copy.)
  2. Set SMART (Specific, Measurable, Achievable, Relevant, Time Bound) goals and keep them in front of you daily!!
  3. Find one or two KPI’s(Key Performance Indicator) and start measuring your performance. I would highly suggest using Revenue per Full Time Equivalent or Labor ROI as one of your indicators if you have more than a couple employees.

I’ve pasted the FoxBusiness article below. It’s a pretty interesting read as well. Reach out and let me know what you think of the article or anything in this post.

Oil Gains on More Support for OPEC Cuts, Optimism About U.S. Crude Draw

Markets Reuters

Oil prices rose for a second day on Thursday, closing more than 1 percent higher as support grew for OPEC output cuts a day after the U.S. government reported a big draw in crude inventories, boosting confidence that a global glut might diminish.

On Wednesday, the U.S. Energy Department reported that U.S. crude stockpiles posted their biggest weekly drawdown since December as imports dropped sharply. Inventories of refined products also fell.

“People are hinging the optimism today on the recent drawdown in inventories and I think that might last as long as we don’t have another inventory build,” said Stewart Glickman, head of energy research at CFRA Research in New York.

In recent days major producers like Iraq, Algeria and Kuwait have voiced support for extending last year’s deal from the Organization of the Petroleum Exporting Countries and other producers to cut supply by almost 1.8 million barrels per day (bpd).

On Thursday, non-members Turkmenistan and Equatorial Guinea said they would also join the cuts, though they are smaller producers.

On May 25, OPEC will meet to determine policy for the second half of 2017. Most analysts expect the group to extend cuts until at least year-end. If they don’t, Glickman said, “they’ll take the floor out from oil prices.”

OPEC said Thursday that group production fell in April. Despite the reduction, there are few signs that supply has fallen significantly as other producers have continued to supply key customers, especially in Asia.

OPEC also said it sees more supply coming from non-member countries such as the United States. The cartel raised its estimate of total oil supply growth from non-OPEC producers this year to 950,000 bpd from a previous forecast of 580,000 bpd.

U.S. oil production <C-OUT-T-EIA> rose to more than 9.3 million bpd last week, highest since August 2015. Even with this week’s drawdown in U.S. crude stocks, Glickman said the country has a way to go to reduce oversupply.

“You’re going to have to have a few weeks of 5 million-barrel draws just to get back to square one,” he said.

CoroMill 745

 

The Sandvik Coromant CoroMill 745 is revolutionary milling cutter with double-sided, multi-edge inserts that have a positive cutting action.

Propaganda Movie Here

 

This insert concept reduces the number of inserts that must be kept on hand because each insert has 14 cutting edges. Cutter body and inserts combine for stable cutting, positive insert seating & reduced spindle loads to give a package that delivers performance & economy in one.

Key Features:

  • Multi-Edge concept with 14 cutting edges
  • Double-sided insert design, tilted for a positive cutting action
  • Thick and secure ground insert with strong and sharp edges for high precision and a secure cutting process
  • Precision-ground geometries designed to avoid workpiece frittering in cast iron
  • Clear insert marking (1-14) for easy indexing of the cutting edges
  • Secure tip seat with easy insert indexing

Click here for Product Brochure with Case Study

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Grinding without the Cord!

Finally…True Industrial Cordless Grinders

From cordless grinders, to drills, to saws, Metabo has the cordless products to get work done.  Need to grind where a cord can’t reach? We can help.  Need to drill some holes and drive some screws miles from the nearest power outlet? No problem! That 2×4 is not going to cut itself and all the outlets on your generator are full? Cordless saw or a second generator…M & M can solve either or both.

  • 4-1/2″ & 6″ Versions
  • 2nd generation brushless motor
  • Anti-vibration side handle
  • Cuts like a corded grinder
  • 66 amps of usable power
  • Metabo LiHD – 3 configurations available

LiHD Cordless Brochure

Jet Volt Series Hoists

Constant Innovation

Already an established innovation leader in manual hoists, Jet has changed the way electronic hoists operate by being the first to bring true variable speed technology to the market.  Years of development and testing have enabled Jet to bring an electronic hoist to the market that will change the way you get work done.  For quicker speeds on longer lifts, or for slower, more precise speeds in tight spots on more controlled lifts, the Volt can handle any job.

Why choose the VOLT?

  • Precision
    • Full-Range Speed Control: lets the operator control hoist speed throughout the entire lift
    • Soft starts and stops increase the life of gear train components, load chain, hooks and brake components
  • Durability
    • Jet hoists are engineered to meet strict tolerances and are constructed with quality materials to ensure they last
    • H4 duty rating
  • Safety
    • The DC electromagnetic brake is an industry-proven safety feature that secures the load even if power is interrupted to the hoist.
    • Overload protection
    • Grade 80 chain with chain bag

 

Additional Info

Volt Video

 

New Tools from Sandvik Coromant

Coropak 16.1

With Coropak 16.1 just two days away here is a look at some of the new tools and line expansions we will see.

  • CoroMill 390
  • Zertivo grade GC1130
  • CoroMill 316
  • QD blade adapters
  • QD thin part-off inserts
  • CoroTurn 300
  • Valve seat pocket tools

 

Coropak_flyer_16-1_06

 

CoroMill 390 Awesomeness!!

Sandvik CoroMill 390 March Promo

  • Shoulder, slot, pocket and face milling capabilities
  • Cutter bodies starting at .375″
  • 07, 11, 17, and 18mm insert sizes
  • Inserts available in new GC1130 Zertivo grade

Call, stop-in or talk to your salesman for pricing and promotion details today.

CoroMill 390 Info

 

 

Elipse P100 Half Mask

Elipse P100 HESPA Half Mask

  • Removes dust particles, metal fumes, mists and vapors
  • Lightweight
  • Low Profile
  • Latex/Silicone Free
  • Face fit kit available

The Elipse P100 from GVS is a lightweight, low profile, P100 half mask designed for comfortable, all day use. Available in small/medium and medium/large sizes this twin filter HESPA respirator only weighs 4.65oz and is compatible with other PPE equipment such as face shields and welding hoods.  The P100 has a 5 year storage life and is available with standard or Nuisance Odor filters to keep you safe and happy.

Swing by M & M for more information and to see

P100 Spec Sheet
P100 Application Guide

 

New CoroTurn Innovation

CoroTurn TR

  • Secure and stable profiling
  • QS quick change shank options
  • Over-under direct coolant capability

CoroTurn 300

  • Eight edged insert
  • Used in CNMG/WNMG type applications
  • High precision coolant
  • Stable insert clamping

Watch for more information on these and other new products coming from Sandvik Coromant.  M & M Sales will be attending Coropak 16.1 early in March and will be ready to answer any and all questions about these and many other products that will improve productivity and reduce headaches in your machining operation.

Take a Look at CoroTurn