Tool BIG KAISER boring tools from BIG DAISHOWA

[Matt-Aburg]

I have production work coming up. My prototype was made on a Bridgeport clone CNC conversion called Supra. This machine has its limitations as far as repeatability. I had to bore through 5.5 deep with a tolerance of plus 0.0000 / minus 0.0005. The bores front and back had to be aligned totally correct. This part is a bearing housing. The bearings on front and back MUST be aligned and press fit in with a minus 0.002 shrink fit. It was very nerve-racking working with a machine that would not return to exact position. another issue was trying to measure with the damn boring head in the way. I was scared to move the table for fear of being out of location due to the repeatability issues.

Moving forward, I would like to do this job again. This time using my CNC router. Now the problem will be high RPM's. A conventional boring head would not work as the balance would shake incredibly. I have found a solution to this problem with a product referenced on a video from a different thread. The guy running CNC toolmaking in his small garage. He uses products from the YouTube video below. I would imagine these cost a lot of moola. I will be making an inquiry though.

This is a boring head meant for high RPM's and is super rigid and accurate. They are BIG KAISER boring tools from BIG DAISHOWA.

CNC Boring Tools

The precision of BIG KAISER modular CNC boring tools delivers measurable performance advantages—significantly reducing costs and cycle times.

www.bigdaishowa.com

 

[Matt-Aburg]

I have found a competitor to the Big Kaiser. I am posting this here for future reference. Also, note that this technology was patented, but the patent has expired. This could mean much cheaper knockoffs in the future. See attached the boring head by Wohlhaupter. Figures this is German technology. Attached the link for this product and also one for the patent on the concept (expired).

Allied - 465 (464) Boring Head Overview

The Wohlhaupter® balance 465 (464) boring head offers precision boring with automatic balancing

www.alliedmachine.com

EP0673710A1 - Balanced boring head - Google Patents

A balanced boring head includes a boring tool holder section (2) and an unbalance compensating section (3). The boring tool holder section comprises an adjusting member (7) for positioning a boring tool holder (5) eccentrically in relation with the central axis of the boring head. The unbalance...

patents.google.com

 

[Matt-Aburg]

More contenders, placed for reference. The copycats are out... So much different than a dovetail style boring head.

 

[Matt-Aburg]

More contenders, placed for reference. The copycats are out... So much different than a dovetail style boring head.

Looks like I got to make a couple more hubs with a 6-week delivery. I have a couple options. I already am approved for a design change to make the bearing part an insert and turn it on the lathe. I would be able to dust the ID very easily and control concentricity better. If I go this route, my customer wants mods since the part is a bit beefier. I need to lose weight on the re-design, since some go into racing cars, and so weight is important. He also wants to really make sure the insert will never come out. I was going to use 3 screws, with thread Loctite, green Loctite on the bore, and also add also spring pins (green them also).

Right now, the lathe is getting a new controller, and so kind of would be a big rush to get her fixed, tested and producing. Router is also a bit away... Guess need to OT this weekend.

My other option is to still use a boring head. I quoted the Dinex system and can have it in 1 week. It, complete with extensions, bite, inserts, boring head and the BT30 holder came in at about 900 USD. The Big Kaiser system was more like 4K USD.

 

[Matt-Aburg]

After the big Kaiser quote, I started designing my own. I base of a picture of a 1000-dollar Chinese knockoff. When I have time, this will be my government project.

For now, Dinex wins!!

 

[PeterT]

A shop made boring head, good for you. I'm keen to see what you come up with. What I would like is a precision BH with finer resolution that 0.001" = 1mm spacing on a teeny dial that I have to put my magnifiers on to see. But I'm guessing that would require a mini gear train or some crazy pitch worm gear. Sounding more like a Swiss watch. I wont ask how much that Walter costs!

I have some back issues for a shop made BH of with (what's the right terminology?) self lateral feeding? Like a Wohlhaupter. I was going to CAD it up one day because the parts centerfold shot was not intuitive to my feeble brain how it worked. Plus I acquired a Taiwan clone-of-something BH that does that, so the shop made project is always down the priority list.

 

[TorontoBuilder]

More contenders, placed for reference. The copycats are out... So much different than a dovetail style boring head.

Holy hell I want this... I guess we wont be buying the boring and facing head we'd plan to buy.

 

[Matt-Aburg]

Holy hell I want this... I guess we wont be buying the boring and facing head we'd plan to buy.

@TorontoBuilder I placed this to save your leg work on finding the north American distributer. Note that your regional salesman is in Canada while mine is in Michigan. For this price, South Korea wins over China and homemade. Although I am still drawing it as a challenge.