Drive belts don’t just fall off in the rain | Torx Hex Key

This quarter, we upped the ante again, making it possible to identify vehicles configuration simply by entering the license plate number. With that new feature, technician can enter the plate number and ProDemand will automatically identify the VIN and provide a specific equipment and service data for that particular vehicle. What a timesaver and for job service writers and for vehicle technicians for both of those populations. It really helps.

It’s impossible to overstate the impact that cordless power tools have had on the way that workers work, and the cordless impact wrench is no exception. Unlike cordless drill/drivers and impact drivers, which excel at drilling holes and driving screws, the impact wrench is specially designed for tightening and loosening various hex-head bolts, nuts and lag screws. It employs both rotational force (torque) and short-burst concussive blows (impacts) to deliver an unparalleled amount of power. For example, most cordless drill/drivers produce between 500 and 600 in.-lb of torque, and the average impact driver delivers about 1,500 in.-lb. By comparison, cordless impact wrenches can easily produce torque outputs of over 3,000 in.-lb, which is more than enough muscle to power-drive the fattest lags and bust loose the most corroded nuts. You can even use an impact wrench to remove lug nuts from car or truck tires. However, all that brute strength isn’t very useful if you can’t control the tool. Fortunately impact wrenches are extremely comfortable to use because the concussive blows smoothly transfer most of that high-energy torque directly to the fastener, not to your hand, wrist or arm. As a result, the twisting motion—known as reactionary torque—that you feel when using an electric drill is virtually eliminated. Now, here are the best impact wrenches.

The problem, at least if you are mostly going cordless, is that you aren’t buying tools, you’re buying into a battery ecosystem. Which means choosing best of breed on an individual level is a self-defeating endeavour. So it really begins at the battery – and that’s where Makita is king. The other issue being industry consolidation. Milwaukee is like Viking in the kitchen appliance space – used to be arguably the best tool maker out there, but then they got bought out (by the same company that makes Ryobi), and Milwaukee’s are just Korean junk with an American sounding name… Read more »

It still baffles me how workers in a Chinese factory can take perfectly good materials and parts and turn them in to total crap, now that’s real skill.

The first thing Apple should have done to that design was scrap the multi-piece bottom case and frame. Two parts would have been perfect. One cast frame and one shell stamping *glued* to the frame. That would’ve shaved the parts count by around 20 posts and screws. Keep that process going. Eliminate all the pointless flex cables by mounting edge connectors around the main board for the peripherals to plug directly into. Goodbye two connector halves and the cable, -3 parts for each peripheral device.

Dynamic mechanical analysis was first developed in the early to mid-1900s for determining the viscoelastic properties of plastics over a range of temperatures and test rates. Viscoelasticity is the property of a material that exhibits some combination of both elastic or spring-like and viscous or flow-like behavior. DMA is carried out by applying a sinusoidally varying force to a sample and measuring the resulting strain response. By analyzing the material response over one cycle, its elastic-spring-like storage modulus and its viscous or flow-like loss (imaginary) modulus can be determined. Complex modulus is the vector sum of the storage and loss (imaginary) modulus and is used to characterize viscoelastic materials. Because modulus values can be computed for each cycle, DMA is a highly efficient method for measuring viscoelastic material behavior over a range of temperatures and frequencies.

Ruskin said (Excuse the paraphrase): Quality requires its price. While it is unwise to pay too much, it is also unwise to pay too little. For when you pay too much, all you lose is money, when you pay too little, the item may not do the job. So you may need to set aside monies to fix what results. The blame also rests with the American consumer. Voting with their dollars has eliminated choice. Only in recent years has there been a uptick in “made in” interest. I fear that is now that interest is almost too late. I am an Engineer with what now is rare, I also have a Journeyman’s license from the State as a Tool & Diemaker. While re-establishing apprenticeship programs throughout industry may seem as a complete solution, one vital component is missing. I served my apprenticeship at Schage Lock with 43 Journeyman. All had something to teach, even if the lessen was how NOT to do something. An apprenticeship program without multiple such teachers is hollow. Politicians that need a soundbite are the only ones that benefit from such programs. “See I signed a bill to fix nearly everything!” There is a reason for the lack of Engineers and skilled tradesmen,as Woodward & Bernstein said: “Follow the money” Most audio research came about in the pre-1950 era. The money is now in marketing and money shape-shifting. I am hoping to be proven wrong, and USA will rise again like a Phoenix from the ashes.

We’ve outlined the dyno results in the following table and produced predictable results. As you should expect, there were no gains at the lower engine speeds but from roughly peak torque upward, we did see minor power improvements. A combination of the stiffer pushrods and AFR’s stud girdle was worth 3 hp and converting to the Crower shaft system generated a peak gain of 8.4 hp and 5.7 lb-ft of torque over the baseline. At 6,000 rpm, the shaft system was worth a solid 10 horsepower. We then averaged the power numbers from 4,500 to 6,700, which are lower but indicate measurable improvements in system stiffness.

“They sent me on my way,” laughs Marinov. “But I didn’t let that deter me, so I went back and said, ‘I really want to work for you guys.’ They agreed to hire me pretty much right out of high school. I worked for them for almost four years. I acquired a lot of skills there – learning how to put together an engine combination, purchasing, dealing with vendors, dealing with customers, learning about measuring, building engines, the dynamics of an engine, learning about cylinder head flow, and all the fun stuff.”

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I knew people who used silicon gaskets in pneumatics products. At some point someone decided they should by cheaper gaskets instead. The new gaskets pretty much always had molding flashing requiring trimming down, sanding (with an extreme fine grit) and cleaning. Even with that they only worked now and then, mostly due to leaks (pneumatics is often very sensitive to leaks due to the compressibility of air).

During this period,  Sebastien Rodriguez, an astronomer at the Université Paris Diderot, France, and his team noted unusual equatorial bright spots in infrared data returned from Cassini, brightenings they interpreted at the time to be the same kind of methane clouds and storms observed on other areas of the moon during the northern equinox.