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  • JCHannum's Avatar
    Today, 01:29 AM
    It would probably go better to either first move over 9/23" & plunge cut with 3/8" or 1/2" end mill, then finish with the 9/16" end mill. Or,...
    10 replies | 247 view(s)
  • JCHannum's Avatar
    Today, 01:22 AM
    Typically 1" & 1-1/4" with 2" capacity. They come with 2" worth of shims.
    7 replies | 258 view(s)
  • JCHannum's Avatar
    Yesterday, 10:42 PM
    The horizontal arbor size is 5/8" as noted in the detailed specification sheet; http://cdn2.grizzly.com/specsheets/g0727_ds.pdf The riser,...
    7 replies | 258 view(s)
  • JCHannum's Avatar
    Yesterday, 07:36 PM
    It appears roughly comparable to the Benchmaster milling machine. The table size and travel are a bit larger. It appears to be a relatively stout...
    7 replies | 258 view(s)
  • JCHannum's Avatar
    02-15-2018, 11:00 AM
    JCHannum replied to a thread New toy coming, PM-1236 in General
    That looks like a very capable machine.
    62 replies | 3485 view(s)
  • JCHannum's Avatar
    02-15-2018, 10:51 AM
    It is a direct indexing head and tailstock probably made for use on a milling machine or a grinder. Purpose made, not shop made. Certainly not worth...
    27 replies | 1665 view(s)
  • JCHannum's Avatar
    02-14-2018, 12:19 PM
    JCHannum replied to a thread My new Sheldon! in General
    When the carriage hard jams against an immoveable object such as mine did, much more than the toolbit is at risk. I suspect your "knowledge" is based...
    50 replies | 2381 view(s)
  • JCHannum's Avatar
    02-13-2018, 10:36 PM
    JCHannum replied to a thread My new Sheldon! in General
    The Sheldon lathe is not the only machine in my shop with a sacrificial gear, it is used in a very common machine accessory, the Align type power...
    50 replies | 2381 view(s)
  • JCHannum's Avatar
    02-13-2018, 10:07 PM
    JCHannum replied to a thread My new Sheldon! in General
    My mistake, you are correct.
    50 replies | 2381 view(s)
  • JCHannum's Avatar
    02-13-2018, 08:51 PM
    JCHannum replied to a thread My new Sheldon! in General
    You're right as usual Jerry. It is much more sensible to destroy the end gears, reduce the QCGB to dust and strip the half nuts along with potential...
    50 replies | 2381 view(s)
  • JCHannum's Avatar
    02-13-2018, 09:05 AM
    JCHannum replied to a thread My new Sheldon! in General
    Stopping the threading feed does take all forces off the threading feed. In the event of a jam it will probably damage or destroy the tooling and/or...
    50 replies | 2381 view(s)
  • JCHannum's Avatar
    02-13-2018, 08:37 AM
    A 5" three jaw and a 6" four jaw would be about right. Due to the problem with the jaws contacting the bed when extended, a 5" can actually have a...
    30 replies | 1192 view(s)
  • JCHannum's Avatar
    02-12-2018, 07:08 PM
    JCHannum replied to a thread My new Sheldon! in General
    The voice of experience here re the sacrificial gears. The Sheldon has no shear pin, nor any place to accommodate one. There is a taper pin on the...
    50 replies | 2381 view(s)
  • JCHannum's Avatar
    02-11-2018, 08:49 PM
    JCHannum replied to a thread My new Sheldon! in General
    Check your PMs. If there are any others interested, PM me. The gear in question is #5, 30T formica gear. It would be without the #27 bushing, you...
    50 replies | 2381 view(s)
  • JCHannum's Avatar
    02-11-2018, 08:10 PM
    JCHannum replied to a thread My new Sheldon! in General
    The original gear is formica as called out by Sheldon, micarta is the same material. The gear is sacrificial to protect the rest of the gear train...
    50 replies | 2381 view(s)
  • JCHannum's Avatar
    02-11-2018, 01:45 PM
    Check your PMs.
    29 replies | 1123 view(s)
  • JCHannum's Avatar
    02-11-2018, 10:20 AM
    JCHannum replied to a thread Tapping 3" Deep in Mic-6 in General
    Taps are available, but not cheap. This is MSC's offering, Victor lists up the 3/8"-16. You might want to contact them. ...
    38 replies | 1417 view(s)
  • JCHannum's Avatar
    02-11-2018, 09:09 AM
    I didn't pick up on the old stock mentioned in the OP as being new old stock, hence my postulating on extractor cuts being done post assembly. NOS...
    29 replies | 1123 view(s)
  • JCHannum's Avatar
    02-09-2018, 03:30 PM
    The .410 is a rimmed cartridge and headspaces on the rim, not overall length. SAAMI headspace specifications are 0.0532" minimum, 0.0672" maximum....
    29 replies | 1123 view(s)
  • JCHannum's Avatar
    02-09-2018, 09:57 AM
    I am suggesting that they made the cuts after assembly, no need to index at that point. It is not out of the question to do it in this manner,...
    29 replies | 1123 view(s)
  • JCHannum's Avatar
    02-08-2018, 09:02 PM
    If a picture is worth a thousand words, a video must be worth 10,000. Ox's video referred to just prior to Jerry's post clearly demonstrates the...
    22 replies | 874 view(s)
  • JCHannum's Avatar
    02-08-2018, 08:51 PM
    I fully understand indexing. I am just saying there is no reason to think that it cannot be accomplished after the barrel and receiver are assembled....
    29 replies | 1123 view(s)
  • JCHannum's Avatar
    02-08-2018, 01:38 PM
    I am not familiar with that particular firearm, but there is no reason to believe that the barrel and receiver were indexed prior to assembly....
    29 replies | 1123 view(s)
  • JCHannum's Avatar
    02-05-2018, 10:32 AM
    JCHannum replied to a thread Micrometers in General
    I have a set of plug gages up to 1/2" that I use for measuring bores up that size. Beyond that I use ball or telescoping gages. If doing multiple...
    66 replies | 3636 view(s)
  • JCHannum's Avatar
    02-05-2018, 09:52 AM
    At one time, Aloris offered what they called the AGS Guide Stop that utilized the hole on the side of the toolpost. It was an adjustable stop that...
    17 replies | 952 view(s)
  • JCHannum's Avatar
    01-29-2018, 06:21 PM
    Starrett No. 54 Hold downs are available in 4" & 6" lengths. They will securely hold thin parts flat to the base of a milling vise. There are...
    24 replies | 1502 view(s)
  • JCHannum's Avatar
    01-29-2018, 11:03 AM
    I did not watch the entire video, but skipped through as I usually do. It could well be edited down to a couple of minutes and presented as a perfect...
    34 replies | 2415 view(s)
  • JCHannum's Avatar
    01-28-2018, 03:56 PM
    JCHannum replied to a thread Is CDCO a one-man band? in General
    As far as I know, CDCO is a family affair and stocks what he sells. You usually see Frank and who is probably his son at the NAMES show. if there is...
    25 replies | 3632 view(s)
  • JCHannum's Avatar
    01-25-2018, 09:38 PM
    Doubtful, way back then my shop was very basic. Using a gear to index would have involved fabbing up some means of holding the gear and blank and...
    22 replies | 1753 view(s)
  • JCHannum's Avatar
    01-25-2018, 07:21 PM
    The past couple of issues of HSM have revisited the Phil Duclos dividing head. I built the original version over twenty years ago. Too frugal to...
    22 replies | 1753 view(s)
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Jim H.

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