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Insert Heads for Table Saw - Delta vs Corob

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Forum topic by PPerry posted 09-28-2019 06:11 AM 543 views 0 times favorited 3 replies Add to Favorites Watch
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PPerry

20 posts in 500 days


09-28-2019 06:11 AM

Topic tags/keywords: insert cutters tablesaw tablesaw

Q#1:

Are the new Corob insert cutter heads for 5/8” arbor table-saws any better than the old Rockwell or Delta style 5/8” heads?

  • For this thread let’s not discuss whether table-saw insert cutter heads are, or are not, a good idea in general. I already have a router, router table, shaper, and cutters for all of them. I just want to know if a competent person with proper precautions and safety setup would get better use out of one type table saw cutter head verses another.
  • I also don’t want to discuss the former LRH’s Magic Molder heads for this thread unless somebody can grind new inserts. That’s kinda the one advantage to the Delta / Corob style heads with the flat cutters.

Q#2: Of the Corob’s, do the larger diameter offerings offer a safer cut verses the same style but smaller diameter?

Q#3: Of the same diameter but wider, does the heavier mass help the cut, or is it mainly for wider insert options?

Q#4: The old Rockwell and Delta heads have a bigger cutout where the setscrew is tapped than the same size Corob. There are also heads where there is no “cutout”, or in other words the only notch in the perimeter is for the cutter, and the setscrew is in a deeper “hole” to reach the cutter. Some of the one’s with no notch for the setscrew are marked “Heavy Duty”. Why is this? Are the ones without a “notch” safer? If so, why?

Q#5: I understand that Craftsman inserts do not fit the old Delta heads. What other brands sold do? Do old Vermont American inserts fit a Delta head (they say they only fit Vermont American).

Q#6: What’s with the vastly different shaped Dewalt heads?

Old Rockwell or Delta head:

This isn’t the Delta head for the bigger tablesaws but for the “portable” ones, but its similar to the other Delta heads.

Corob without notches />

Diagram of regular vs “heavy duty” w/o notches />


3 replies so far

View therealSteveN's profile

therealSteveN

4906 posts in 1214 days


#1 posted 01-27-2020 08:48 AM

There are a number of different style heads known as TS cutter heads/moulding heads. For my money if I was buying into this type of head for my TS, it would have a robust attachment of the loose cutters to the head.

Your Corob appears to have a single point of attachment of the cutters to the head. So I would instead look at the Table Saw Moulding Attachment Which obviously has 2 points of attachment. Plus I would bet the specs on how it is machined are tighter.

https://www.wmooreprofiles.com/table-saw-tooling/table-saw-heads

-- Think safe, be safe

View Fred Hargis's profile

Fred Hargis

5988 posts in 3133 days


#2 posted 01-27-2020 11:33 AM

I’m going to guess that the shape of the Dewalt head is designed to reduce weight…that would probably be important on their slightly less powerful RAS models.

-- Our village hasn't lost it's idiot, he was elected to congress.

View Jared_S's profile

Jared_S

297 posts in 599 days


#3 posted 01-27-2020 01:10 PM


There are a number of different style heads known as TS cutter heads/moulding heads. For my money if I was buying into this type of head for my TS, it would have a robust attachment of the loose cutters to the head.

Your Corob appears to have a single point of attachment of the cutters to the head. So I would instead look at the Table Saw Moulding Attachment Which obviously has 2 points of attachment. Plus I would bet the specs on how it is machined are tighter.

https://www.wmooreprofiles.com/table-saw-tooling/table-saw-heads

- therealSteveN

It’s a standard corrugated shaper head but sized for a (larger) 1” arbor table saw. The down side will be there are no off the shelf knives available as all are custom ground to suit the application.

Expect $100 minimum for a knife set

The magic molder is the modern equivalent of the delta head, with a better securing method, however unless there is operator error the delta/Corob is fine

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