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Fastenal sharpens its saw service offering

Posted on 07 Jan 2021 and read 1521 times
Fastenal sharpens its saw service offeringWhen it comes to fasteners, MRO equipment and quite literally any manufacturing supply you could think of, it doesn’t get much bigger than Fastenal. With over 3,200 in-market locations and 15 distribution centres that span four continents, Fastenal is one of the world’s largest industrial supply companies.

Founded by Bob Kierlin back in 1967, the US-based company that started as a small business selling fasteners, has grown rapidly and now employs a 20,000 world-wide workforce with ten manufacturing facilities to add to its thousands of branches and a seemingly endless list of more than 750,000 available manufacturing items.

However, it is the ten manufacturing sites with more than 500 staff that sets Fastenal apart from its competitors. With more than 200 staff, the largest manufacturing site is located at the company’s headquarters in Minnesota, which is also home to two Vollmer circular saw blade sharpening machines.

The story behind buying the two Vollmer machines started back in the 1980s when the company first started manufacturing and modifying fasteners for its customer base. With tens of thousands of fasteners being modified each month in all shapes and sizes up to a 4in diameter, Fastenal found the process had an insatiable appetite for burning through HSS circular saw blades.

So, instead of continually sending an increasing number of blades to a sub-contract shop for sharpening, Fastenal bought its first saw blade sharpening machine – culminating in the opening of Fastenal’s sharpening shop in 1995.

With on-site facilities for cold and hot-formed fastener production, the 100,000ft factory quickly evolved its cutting capabilities, adding Tungsten Carbide Tipped (TCT) sawing to its existing HSS cold saws.

A wider variety of fastener materials, a production increase and the need for sharpening both HSS and TCT saws led Fastenal to add a series of additional saw blade grinding machines from 1995 through the 2000s.

Vollmer 1This investment in grinding machines was bolstered by the decision to branch out to servicing saws for local customers. As the servicing of blades for Fastenal customers rapidly grew, the sharpening shop added more machines from different manufacturers, and by the late-2000s the company had four grinding machines for sharpening cold saws and another three sharpening machines for servicing TCT blades.

With an unwavering commitment to quality and service, the Fastenal sharpening shop started witnessing decreasing quality levels and lead times were increasing as machine running hours were falling due to continual breakdowns of the ageing machines.

Add the fact that the machines were running 20hr a day over two 10hr shifts from Monday to Thursday with 12hr shifts from Friday through Sunday, Fastenal could not afford any machine downtime.

With four manually loaded cold saw re-sharpening machines and three TCT saw grinding machines, the seven staff in the department had an output of 20 HSS saw blades and an additional 25 carbide-tipped saws each day – an output that yielded a lead time of two to three weeks on saw blade servicing.

Not satisfied with its productivity levels and lead times, the costly servicing and repeated repairs of ageing machines and the subsequent knock-on effect of further extending lead times – the situation had to change.

Automation high on the agenda

The Fastenal engineering team had visited numerous trade fairs and had engaged in several discussions with Shaun Loveless, regional sales manager at Vollmer of America. A major concern for Fastenal was the skill level of the local labour pool, so automation was high on the agenda.

Scott Rodeghier, Fastenal Sharpening Shop operations manager, said: “There is a significant skill shortage in the area and attracting skilled staff is a challenge. We knew automation was the route forward and Shaun and Vollmer showed us that route.”

In 2018, Fastenal took the plunge and jumped straight into automation with the acquisition of a Vollmer CHD270 carbide-tipped saw sharpening machine with eight CNC-controlled axes and the Vollmer ND230 automated loading station.

Vollmer 2With the capacity to store up to 250 saw blades, the four-axis robotic loading system with three loading carriages transformed production almost instantly.

Mr Rodeghier continued: “The guys on the shopfloor rapidly learned how to program and use the machine, and we soon got into a rhythm of resharpening and servicing special saw blades during the day shift and then loading-up standard geometry saws and batch-run quantities on the ND230 loading station for unmanned overnight running.

“Immediately, our team got into a cycle where we could process special saw blades by day, do standards and batch-runs overnight and, in the morning, we could unload the finished saws and pack them to be distributed nation-wide back to our customers – and then start the cycle over.”

The benefits of the Vollmer CHD270 in facilitating this production cycle has been significant. Firstly, despite having seven older machines, none were capable of processing special geometry saw blades.

The special blades that were still serviced externally were instantly brought back in-house, giving Fastenal full process control while reducing lead times and dependency on an external supplier – and that is before factoring in the elimination of sub-contract costs.

From a productivity perspective, Fastenal stepped up from processing 25 TCT blades a day to over 25 on each shift – with capacity to spare.

Cost-efficient production

Mr Rodeghier continued: “Our extra capacity is created by several factors. Firstly, the CHD270 and its ND230 robotic loading system can process between 40 to 60 blades overnight unmanned, giving us cost-efficient production. Adding to this, the blade processing times are at least 35% faster than with the old machines.

Vollmer 4Furthermore, the automated wheel dressing and in-process measurement system that automatically probes and compensates for any grinding wheel dressing and saw blade geometry discrepancies takes another 15 to 20% off our set-up and processing times.

The probing cycle also picks up on any brazing errors or tooth issues to eradicate errors. When conducting this cycle unmanned, the CHD270 will identify the error, post an error message, return the blade to the automation station and continue its lights-out operation with the next saw blade.

All this took us from 20-plus blades a week to 20 blades per shift, equally important is that we can now sell this capacity which we were not confident of doing previously.”

The instant success of the Vollmer CHD270 resulted in the company ordering the Loroch Solution K850 grinding centre for sharpening, re-toothing and chamfering its metal-cutting circular saw blades.

Delivered six months after the Vollmer CHD270 in the spring of 2019, the combination of the Loroch Solution K850 and the Vollmer CHD270 reduced labour requirement in the saw blade sharpening cell from five staff to just two – replacing seven machines with just the two.

Mr Rodeghier said: “The two machines have saved us a huge amount of floor space, and we have reduced our headcount in the department, allowing us to re-locate skilled staff to alternate tasks. What we have also found is that we can now attract new staff, as people want to work on the very latest CNC technology that is available.”

Like the Vollmer CHD270 before it, the arrival of the Loroch Solution K850 eliminated the requirement for external sub-contract servicing of saw blades, giving Fastenal the flexibility, capability and capacity to produce both standard and special geometry blades.

He added: “The Solution machine typically has a blade processing cycle time in the region of 12min. This means we now have one operator working across both the automated Vollmer CHD270 and the Solution machine.”

The cost reductions and productivity improvements for Fastenal have been significant. Equally impressive is the lead time reduction, as Mr Rodeghier highlighted: “With seven older machines, we had a lead time of two to three weeks, now with two Vollmer machines we have reduced our lead time to four to five days with a nation-wide next day service if required. However, we are taking this service level a step further.

Vollmer 3With the Vollmer machines, we have the facility to generate hundreds of blade geometries that have been optimised for all material types. So, we can consult with our customers regarding the performance of their saw blades and we can optimise their cutting performance by tweaking the geometries of their blades.

This is something that wasn’t even possible with the previous machines. We have customers in sectors as diverse as windows and construction through to oil and gas, steel demons, trailers and just about any other industry sector. So, having the facility to support all sectors is an exciting prospect.”

“Our head of maintenance once said to me that the salesman sells you the first machine and the service and support sells every machine thereafter.

“This is certainly the case with Vollmer, its service has been excellent, and we even have a ‘dial-in’ service where Vollmer engineers can connect to our machines remotely to investigate possible service or maintenance issues, potentially resolving any problems.”

Mr Rodeghier concluded: “When we fill the capacity of the CHD 270 and Solution K850 machine, we will have no reservations in buying further machines. Additionally, as a sharpening shop, we process over 10,000 solid carbide end mills every month.

“The service level for the machines processing end mills is not even close to the service we receive from Vollmer, so we are already looking at the impressive Vollmer VGrind with its vertically aligned twin-spindle configuration for furthering our ambitions in this department.”