Seco R220.LN14 Square Shoulder Mills Cut Costs in Demanding Applications

TROY, Mich., — Seco Tools, LLC recently introduced a new line of R220.LN14 square shoulder mills that reduce costs and improve performance in demanding applications that require large depths of cut.

R220.LN14 square shoulder mills provide four cutting edges with a 14 mm (0.551″) cutting edge length to reduce cost per edge. Negative rake, 7 mm (0.28″) thick inserts provide the robustness needed for heavy cuts in difficult materials, long-reach applications and less stable setups. With geometry similar to Seco’s highly successful Square 6, the tools are also very free cutting.

The standard tools are able to take depths of cut up to 14 mm (0.551″), while the helical versions are offered in cutting edge lengths for both contouring and slotting applications. R220.LN14 cutters are an excellent choice for medium- to heavy-duty applications requiring a 90-degree wall.

Inserts are available in six grades: MS2500, a CVD coated, highly wear-resistant and tough grade for machining superalloy materials and high-carbon steels; 420470, which provides toughness greater than MS2500; 150060, which is very similar to Seco’s F40M; and 029060, an alternative to the company’s MK1500 with a PVD coating; MP2500, which is a medium steel CVD Duratomic grade; and MK1500, which is a cast iron CVD Duratomic grade.

New! Knit-Pak(TM)+ Size 000.0

Impregnated Knitted Retraction Cord from Premier® Dental Products Company

Knit-Pak+ 000.0 is the smallest diameter cord on the market! The small size is ideal as the first cord in the double cord technique and is especially useful when packing tight gingival tissue.  The impregnated aluminum chloride is a proven safe and effective hemostatic agent.

Knit-Pak+ is a knitted retraction cord manufactured from unique microfibers. The fibers are distinguished by having very low moisture content with high durability and retention properties. These attributes create a retraction cord with superior absorbency and a pliable structure that resists fraying. Knit-Pak+ offers exact-dosage medicinal loading (AlCl3• 6H2O   0.5mg± 0.1mg/inch), easily packs into sulcus, and will not entangle in burs.

The Knit-Pak+ containers feature a ceramic cutting blade inside the cap that automatically cuts the cord upon closing.  The yellow cap identifies the impregnated Knit-Pak+ and a white cap distinguishes the original Knit-Pak non-impregnated cord.  Knit-Pak+ is available in six different sizes which are color-coded for quick and easy identification.

New microPEM® TackScrew(TM) Fasteners for Compact Electronics Add Removability Feature to Original TackPin® Design

New microPEM® TackScrew™ fasteners from PennEngineering® integrate proven self-clinching technology for permanent sheet-to-sheet attachment while also incorporating a unique thread-like feature to allow fastener removal when necessary.  This combination adds functionality to the original microPEM TackPin™ fastener product line for thin sheet attachment applications, especially compact electronics.  TackScrew fasteners can even be reinstalled one time if desired.

These hardened stainless steel Type TS™ fasteners ultimately can serve as highly practical solutions to attach a top sheet or panel to a base material in applications ranging from laptops, notebooks, and tablet computers to smart phones, gaming and hand held devices, and wearable electronics, among others.

As suitable replacements for micro screws, TackScrew fasteners will not require the added costs of locking patches, threaded inserts, tapped holes or driver bits for initial installation, or potential rework due to cross threading and driver bit “cam out.”  The clinch technology resists vibrational loosening in service and the fastener’s low-profile head can add cosmetic value.

The fasteners install in thin sheets by preparing properly sized mounting holes in the sheet to be attached and the base panel.  After inserting the fastener into these holes, the fastener is pressed into place.  The fastener then clinches into the base panel and its head subsequently holds the top sheet (as thin as 0.2mm / .008”) firmly and permanently in place.  The base panel can be as hard as HRB 89 / HB 187 or less on the Rockwell “B” and Brinell scales, respectively, and as thin as 0.91mm / .036”.

Tap cutting oversize! How to fix or problems to look for??

I have a problem at work and not sure what to do/how to fix. I have a 2-56 STI thread cutting tap (3B) that is cutting oversize. The NoGo gage is going in very easily, yes, it is also a 3B gage. Here is what I mean by “not knowing what to do or how to fix it” –

The drilled hole is to size, called out in a couple different charts as a 3/32″. I checked the hole size, a .094 gage pin goes in, a .095 does not.
The Helicoil chart I have says the hole should check from .089-.096 after it is tapped. I check the hole at .094/.095 after it is tapped.

So all the data (although limited) says I should have a good thread, or at least everything up until the threading part is correct. What else can I do or check if my holes (before and after tapping) are within spec? To note, the thread gage (Balax brand) lists the GO as like .0963 and the NOGO as .0976 (or something close, I remember it is only .0013″ difference between them). Here are the details I can think to list –

OSG brand tap, 2 flute, spiral point
Solid (not the spring loaded kind) quick change holder, runout TIR less than .002
840 rpm, 15ipm
Haas UMC-750 with rigid tapping, retract speed set to 2x
6061 aluminum plate material
Castrol Hysol MB50 (I think that is the brand, not at work now) at approx 10% mix

A few questions up front, could the gage be wrong by any chance? It is brand new with certs FYI, but mistakes happen… Could the tap be labeled wrong or be bad? Seems like .0013″ total is awfully tight for a $20 tap, but I am not familiar with all the different classes of fit. If I drill the hole undersize (next drill would be .0895, I think) would it make a difference on the thread gage? Not really too familiar with thread gaging, most places I been it has always been just tap it and if the bolt threads in and gets tight its a “good” thread…
It’s possible I don’t have a 3B tap, not at work to double check this, but pretty sure I checked this to the print spec so I ordered the 3B gage, I assume (you know how that goes!) that I also ordered a 3B tap at the same time… To that point, anyone know the difference in spec between 2B and 3B? Is it enough that a 2B tap/thread is bad checked against a 3B gage?

Broaching on CNC mill?

How do you broach on a CNC mill? Anyone have pics of there set-ups/tool holders? I would like to know the best way to do this. The key ways would be apox. 1 1/2″ to 2″ wide and 8″ to 10″ deep key ways. Any way to do it on a mazac?

Will the spindle bearings be destoyed? Thanks for your help.


Any experieced techs on the Fanuc OT control? X losing position

This has happened several times and even cause a minor crash. X0 ends up some odd amount off like .100″ or so, out of the blue. The odd part is I would think the control would error out and it actually has a couple times wanting zero return in which we go check tools again and find that it is off.

Sure seems like the X encoder is losing signal or something but I am baffled how the machine would lose position yet the control does not error out? I suppose the digital pulses don’t show up at the control for a small amount of time so control just does not count them?

Brings another point of how the heck I am supposed to find this ghost!!!

Fanuc 10M Troubleshooting Z-axis

I recently purchased a 1987 Kiwa Excel Center4L that was stated to be in working condition. Pretty basic 3-axis boxway cnc mill using a Fanuc 10M control. I am in the process of getting the machine cleaned up and running but haven’t been able to get the z-axis to move. The y and x axis move and I was able to complete the zero point return.

Using the diagnostic screen I can see the z-axis selection switch is working and the z-axis cancel switch is working. The brake is releasing and I can move the spindle slightly with a jack so I know that isn’t stuck.

I uncoupled the servo and when the machine is powered on and the axis enabled the Z-axis servo holds position so I believe the servo amplifier is working.

I have all of the manuals for the control and machine but none of them cover troubleshooting this in depth that I can find.

Is there a way to test the axis control board? I am not sure what to test next and don’t want to spend money replacing working parts.

Can I supply a signal to the servo amplifier manually to test that?

Acramatic A2100 tool loading problems

Last year we got a couple of Cincinnati machines (used lathe and mill). We are just now getting them up and running and I will plead ignorance without embarrassment. I have never run CNC before but by reading the manuals I have been able to run a few parts on each without incident. Another worker has been running them for 15 years he says, just not Acramatic. The problem is getting the tool descriptions loaded into the tool list on the mill (Arrow 1000). I can put tool 1 in pocket one etc. but can’t teach the machine what that tool is. When viewing the page for the tool I can highlight each of the areas (dia., length, material, etc. but can’t type anything into spaces. All tools are listed as unknown. There is no way to know which tool I am trying to describe. Does the tool have to be in the spindle? The other worker is as lost as I am. I follow the steps in the operator’s manual to the letter but it says to enter the items yet the keyboard has no effect. Can someone maybe point me in the right direction?

Royal Filtermist turned on by CNC?

I recently installed a Filtermist unit from Royal Products and was thinking I would like to have it turn on and off via the CNC control. I would figure either a separate M-Code or making it turn on and off when the coolant comes on and off. Is this something any of you are doing? I figure you may need a magnetic starter coming off a relay from the CNC? Just wondering if anyone out there is doing something like this and what your setup is like.

Lagunmatic 3516 VMC, just got out of a control issue, now having lube issues

Hi guys, I do not post much but read quite a bit. I purchased this VMC a while back and just got it into a space where I can operate it. Its a 1996 vintage with the Acramatic/Vickers/Siemens A2100 control. I have the full electrical schematic from Lagun but have not been able to get support recently on the mechanical side.

Just to share for those having a hard time with one of these machines after replacing BIOS batteries I do have some answers. And I have been troubleshooting this thing off and on for a year and finally decided its too much metal to sit there unused. So there were 2 simple problems I had. Big thanks to Siemens for some guidance.

1. The Bridgeboard Failure [WS] on init. The resolution for me was in BIOS settings but not as apparent and one might think. It all comes down to devices on the ISA bus and IRQ conflicts. The short story is that the Audio codec was configured for IRQ5 and it should have just been disabled. While all other BIOS settings were correct they never addressed the audio configuration. After disabling the audio I was booting and talking to the NC contoller. But first I resolved another simple issue below.

2. Before I found above I finally went into the emergency uninstall menu during diagnostics and found that the WS board had the correct version but the NC controller and RT board were in default configuration. Thanks to date codes I was able to align them all to the LAGUN WS application installation date.

So, that leads me to my current problem which is much more generic. The Machine now alarms on a low lube pressure fault. Its a Bijur Versamatic II