Cross-hole deburring can be tedious and time consuming. It's not easy to remove sharp edges from grooves, undercuts, slots or internal holes either. For precision parts, however, it's essential to have smooth, round edges. Components with hard-to-access features need a close-tolerance surface finish, too.
Threaded parts with diameters less than 0.125 in. are hard to deburr. That’s because the rough edges or ridges left by machining are so small. Heavy nylon deburring tools or butterfly brushes are fine for larger threaded components, but what about the microburrs on smaller threaded parts? They need precise polishing rather than aggressive deburring.
The Pontiac Firebird Trans Am was an iconic muscle car with a reputation for speed and flair. In 2002, the Trans Am’s final year of production, Pontiac powered its pony car with an 8-cylinder, 16-valve, 5.7-liter, 347-cubic inch engine called the LS1.
Even today, restoring this all-aluminum engine block is a labor of love. As ls1tech.com, an automotive website, a mechanic shared a story that’s familiar to many do-it-yourselfers (DIYers). For surface finishing cylinder walls, there’s no substitute for BRM Flex-Hone® tools.
Shotgun chambers need a smooth, polished finish so that spent shells eject properly. The bore’s surface may look shiny, but there’s more to chamber honing than the mirror-like finish that meets the eye.
For best results, a shotgun chamber needs a plateau finish with a uniform series of peaks and oil-retaining valleys. This substantially smooth surface finish reduces friction and fouling while promoting optimum lubrication.
Some gun owners have heard of plateau finishing, but the phrase “slicking up” might be better-known. In Slicking up the Stoeger S x S Shotgun Part III, an on-line article about shotgun chamber honing, the owner of a Stoeger Silverado Coach Gun described the power of plateau finishing with Flex-Hone® for Firearms tools. “Those shells will easily come out of the chambers now,” the gunsmith explained.
Topics: flex-hone for firearms
Bearing bores are engine components that house the main bearings, mechanical elements with grooves for passing oil to feed-holes in the crankshaft. For optimum engine performance, bearing bores or tunnels must meet tight tolerances and have an oil-retaining surface finish.
Line boring with a rigid hone is the right choice for bores that are out-of-round or that require significant material removal. To impart an oil-retaining final finish, however, automotive experts like MSB Tuning in Queensland, Australia recommend the “world’s best cylinder bore” – the BRM Flex-Hone® tool.
Engine cylinders need a substantially smooth surface finish that’s free from cut, torn, and folded metal. Yet cylinder walls can be so smooth that engine performance suffers.
Over time, the up-and-down movement of pistons creates an overly smooth surface finish. Piston rings skate along cylinder walls and fail to seat and seal properly. The “glaze” that forms can also prevent engine oil from adhering properly.
The solution to these challenges is the Flex-Hone® tool from Brush Research Manufacturing (BRM). This Made in the USA glaze-breaker hone removes burrs, deglazes cylinder walls, and improves surface finish at the same time. That’s why bloggers like The Bug Boys use BRM Flex-Hone® tools for engine rebuilds.
Camaro brake valves can confound even experienced mechanics. Part of the problem is that some of these valves are known by more than one name. For example, metering valves are sometimes called pressure regulator valves or hold-off valves in different GM publications.
At Muscle Car Research, an on-line automotive community, a mechanic described a successful metering valve rebuild for a 1970 Chevrolet Camaro. To impart the ideal cylinder surface finish, the brake mechanic used a ball hone – a tool that’s better known as the BRM Flex-Hone®.
Made in the USA by Brush Research Manufacturing (BRM), the Flex-Hone® tool has its share of nicknames. Yet no matter what you call this flexible honing tool, you can improve cylinder surface finish by following some basic guidelines.
Porsche wheel cylinders support braking in sportscars that pack plenty of power. In classic cars like the Porsche 356, these cylinders have pistons that are connected to brake shoes. If a wheel cylinder lacks the right surface finish, however, more than just piston ring sealing can suffer.
At the Porsche 356 Registry, an on-line community, the owner of a Porsche 356B asked for advice about honing brake cylinders. A few users suggested honing stones, but a German mechanic recommended the Flex-Hone® tool from Brush Research Manufacturing (BRM).
“I use this tool,” the Porsche mechanic explained. “This works better than all others.”
Honda D-series engines once powered compact cars like the Honda Civic. These four-cylinder aluminum engines were fuel-efficient and lightweight, but could be modified with high-compression pistons for increased power and performance.
At D-series.org, an on-line community for Honda enthusiasts, the owner of 1991 Honda Civic explained how he bought a 1.5L D-Series engine after the original powerplant “died”. The engine rebuilder inspected each cylinder and then asked for advice.
“Everyone said that good honing will take care of the rust and anything else left in the bore,” he said. To finish the cylinder walls, the DIYer used the BRM Flex-Hone® tool. The mechanic admitted he “had some doubts” about flexible cylinder honing, but using the tool made him a believer.
Diesel Power magazine provides professional diesel mechanics with in-depth examples of engine rebuilds. Do-it-yourselfers (DIYers) also read the world’s largest diesel magazine for tips, techniques, and recommendations about engine tool selection and use.
In an article entitled Rebuilding International’s 7.3L IDI Engine Heads and Crank, Diesel Power described what the author called “the key” to a good engine rebuild – the Flex-Hone® tool from Brush Research Manufacturing (BRM). These flexible cylinder hones impart an oil-retaining surface finish that promotes piston ring seating and sealing in big diesel engines like the International IDI.