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Swiss Precision Since 1961 

SWiss Quality Production Deburring Cross Bores

Beating the Burrs

Deburring cross bores on crank cases proved to be a problem. An innovation from Heule provided a solution. 

You will struggle to find a machinist who enjoys deburring. It is often seen as a stubborn problem compared to other parts of the processes that work well. A German car manufacturer found itself in this position when it came to producing a crankcase. The production process itself was fine. But when it came to deburring the cross bores, there were issues. The process was too complex and not reliable enough. But just like  many situations before, the problem proved to be fertile ground for innovation for Heule, as specialist producer of deburring tools from Switzerland. 

In this specific case, the car manufacturer's head of technology attended the AMB trade fair in Stuttgart to discuss the problem with Heule. "We currently use two deep-hole drills that we drive through the two boreholes 8-10 times each," explained the specialist. "But the process has proven unreliable. There are sometimes burrs left over, which require 100% checking and re-working. Now we are looking for a better solution." 



Back Spotfacing article in AMD

Overcoming a Back Spot Facing Challenge

Whitcraft Group Machinists use Heule Tools to meet tight tolerances on difficult Inconel parts.

Aerospace industry specs often call for a part to be machined to the thousandth of an inch. In an ideal world, that level of precision wouldn’t sacrifice production time or tool longevity. Whitcraft Group, a manufacturer of aerospace components, is living in that ideal world, machining parts accurately, quickly, and without tool failure.

Mike Anderson, lead/supervisor of the Bearing Housing Flow Line at Whitcraft, gives the credit to the back spot facing (BSF) tool from Heule Tool he recently brought into the shop’s line. The BSF has sped up production time, decreased insert costs, and increased tool longevity, without sacrificing precision.




To download a PDF of the full article in AMD, click here. 

Cutting Tool Engineering Cover

Crossed Up

Specialized tools help deburr cross-holes.

 Deburring drilled holes is essential to the manufacturing process. Burrs that aren't cleaned up can cause part failure by breaking off and clogging or damaging a part or an assembly or by cutting a wire or an O-ring that's passed through a bore. But cross-holes, where two or more holes intersect, are hard to reach and often require deburring by hand. 



production machining magazine

Automated Deburring Tool Increases Production of Subsea Valves

Multiple difficult-to-reach holes, each of varying sizes, and of varying quantity depending on the part in question made machining subsea valves at Abco Subsea difficult. But ever since the company found the Cofa C Series tooling from HEULE Tool, it has worked flawlessly in the production line. 



cross hole deburring article

Deburring Cross-Hole Intersections with Automated Tools

by Gary Brown

Machinists and programmers alike know how demanding cross-hole drilling can be, as it often exacerbates many of the difficulties inherent in metalworking. 

Deburring is already a painstaking process, but when burrs are difficult to inspect and access, as is the case in cross-hole intersections, traditional deburring methods are time consuming and inefficient. 



Deburring COFA tool

Macro Economics, Micro Burrs: Get a Handle on Cost per Part, Set a Target

The mindset that should accompany decision making about how best to deburr parts should depend on establishing a target for cost per part. That’s the sage advice of LaRoux Gillespie, Dr. Eng, FSME, CMfgE, PE, a past president of SME and author of 13 books on burrs and deburring.




Modern Machine Shop Magazine

Back Spotfacing Tool Frees Production from Costly Bottlenecks

Automating a time-consuming, intricate process can save a shop time and money while freeing up labor power for other tasks. Sometimes automation looks like a robot or a computer; but sometimes it looks like a counterboring tool with a retracting blade. A back spotfacer from Heule Tool (Loveland, Ohio) removed the need for operators at one machining business to manually detach and reattach the tool’s cutting head, reducing process time by two to three hours per part, on average.



Canadian Metalworking

Driving Automatics:

 Automatic back spotfacing frees manpower at Vancouver machine shop

 For Sicom Industries, reliability and on-time production are what keep their customers coming back. Its parts are high value and its clients are in competitive industries, so being successful sometimes comes down to having the right tool for incredibly specific jobs, like back spotfacing up to 40 holes in an intricate casting for an oil pipeline. 



Aerospace Engineering and Design

Precise Through-Holes

Implementing the right tools helps achieve perfectly deburred chamfered through-holes – and these tools benefit more than just jet engine manufacturers.

Gary Brown, vice president and general manager, Heule Tool of North America, explains that currently, "A major jet engine component manufacturer uses the Heule-BRM tool combination for finishing chamfered holes on rotating engine parts.

"They do this, not only because it is an efficient way to achieve the very stringent tolerances required, but also because there simply is not another method of doing the work that is sufficiently stable and repeatable."


back spotfacing cutting tool engineering

Cutting back spotfacing cycle time

Fulflo Specialties Inc used the HEULE SOLO tool to increase productivity

“Machining time on the valve bottoms, which includes boring the hole to size, drilling and back spotfacing, dropped from 39 minutes to 15,” Collett said. “And that’s running at the low end of the recommended speed and feed range for the back spotfacing tools.”

Tool life increase was equally impressive. “So far we’ve run 420 stainless valves, up from 2 on the old tool and we’ve only indexed the two-sided inserts once,” Collett reported.



Cutting Tool Engineering

Smooth Flight

A set of tools is used to automate drilling, reaming, deburring, and edge blending of chamfered through-holes for jet-engine fasteners. 

To avoid delays and reduce tool costs, some aerospace manufacturers are automating holemaking and finishing processes that incorporate cutting, edgebreaking and deburring tools as well as ball-style flexible hones for the edge blending process. Some jet-engine manufacturers are recommending or requiring that suppliers use these automated processes. One such combination uses Heule’s DEFA chamfering tool, its COFA universal deburring tool and a miniature Flex-Hone tool from Brush Research Manufacturing Co. Inc. (BRM), Los Angeles.