• Scam Alert. Members are reminded to NOT send money to buy anything. Don't buy things remote and have it shipped - go get it yourself, pay in person, and take your equipment with you. Scammers have burned people on this forum. Urgency, secrecy, excuses, selling for friend, newish members, FUD, are RED FLAGS. A video conference call is not adequate assurance. Face to face interactions are required. Please report suspicions to the forum admins. Stay Safe - anyone can get scammed.
  • Several Regions have held meetups already, but others are being planned or are evaluating the interest. The Ontario GTA West area meetup is planned for Saturday April 26th at Greasemonkeys shop in Aylmer Ontario. If you are interested and haven’t signed up yet, click here! Arbutus has also explored interest in a Fraser Valley meetup but it seems members either missed his thread or had other plans. Let him know if you are interested in a meetup later in the year by posting here! Slowpoke is trying to pull together an Ottawa area meetup later this summer. No date has been selected yet, so let him know if you are interested here! We are not aware of any other meetups being planned this year. If you are interested in doing something in your area, let everyone know and make it happen! Meetups are a great way to make new machining friends and get hands on help in your area. Don’t be shy, sign up and come, or plan your own meetup!

A slitting saw arbor before dinner

PaulL

Technologist at Large
Premium Member
Finished work and decided I needed an arbor for my newly delivered first slitting saw!
Shamelessly adapted from Blondihacks' video on the subject, I present you: Arbor the first.
dDU3IeMwowkzUKCd3T2pOdXuFazRupHas6WC8Jkk2dX1CGiNfRLiTt6L-tsiBSGBaZ_u33Mrzy98mV-aPZXWhTEdtudBDhp8qWjA7Jrffs6rvNjrGIgBfi4XpwpSuToX2jjGbSd5In_L8ifk1u7Nh9d4hET-G7yPuLrJATCK264YlV4AcuuORtoenYNsgIKkA4ma8XlX6aCjzIIcYyQvCtKrI440SeN__-TM3fqXvyocz4NqnQSnVOcaB86wppsoWrgTQ8SrxNbVi9LtzexCd4oqF1vVhwV6ou0YM3cw-nHLOn-mvaFN8tnHP6TjcJqrlKfFtzZlwivlrbKW5o_IOeNR4S51ne_varNpA_wdTUFS5ZTwh2_euRTSuAnXMIqrchyrkQ5Wi3FHcB01ayTADzLKMJWIXEgjFdsyJ9IZRLkWKnXLO8G-2su1bIzudohBBRQx-iV9he-_pp2_Olo4v21m4gQ_9zu7CrnVTWrm_ByAI3wnncsmc42hy4RlOy0-gfSoA0tVGyUrZ53Eo-y8ecL5FRhQuj_HUl9eBeCNrun94qCzqzlpnxn0TO_3nMnf6cIxZ9wHdNQsvqTsZTKZOsO1676L8l7V_BW1Gqr3VriMktS9w4xB6iTo5Awm3u-0PyqPFIkEmWsSOiZhY0kQzRPuQ0nctv9AMikv5n71tZlmFd6fpf3Rwzvjbeyq52MaKJn_5jastPzh3K3dZs3Ldt04N6RYsteQ1rx5_KVsaxJo0YBxTbao3EG8LzGugIq9jVRpgEHqtUfg5qjXJH7dVmbW_A_I-WUM_g=w1026-h1362-no

A bit of turning work, threading work, drilling, tapping, and cutting off. Missed my dimension on the arbor shoulder by about 2 thou which was annoying. The remainder worked ok, though I have some minor order-of-operation concentricity concerns, mostly in drilling aftercutting off the screw section. That said, it cut on the first try!
I3cCdmPIiZ2gh-nnXxIvwZ_s0hZRQ0rJgBOaEt5zaNY6vSrn2RRj8tHuPe0HJNi01oXo8RPHrZwXNCDcixNNp2IADa0YPa7xE9kKGb1OF3h7br8vE6y9O3YYtA1Lckn7UWzi6A58OMFWOX1ToDGklmCguesBIDMDdZopevSW0a5izw77rzh1ei0aEhOiJXLjQv10R7Cv4x96v5pzrbgcDl4LZZTHLvN8BD5vY8oNL7tiXZFvhJsoI0G2Mbjht8KRcHOtjrnH3OUAqNEXatGWxfADk-elAg2idsZm40T0SPXk0s_bVjt9BjOHt3JLbhm_gANQV11-aX3A4It76BkkpO-2Ff8YTWFw6R9rYKuEuOfJrQU6PVll3UhUDSuL2-LxUp3EVyNO6APxTGM2Rkq-EqFqVsT81xpNf2ZwQAI_Rr6w4gyl4qruS7UnAbEGCX27X9PRgoRWif-fktZ8fQRozJCCsIQG_ZoLAWLTufIUaciae0_RDV4psG4uZXeXIBvw4DoFN9yAfeIGhJnrId3sRkaaasb6As3eguAYUAGGPwytG92nGYHZx_paR5pPOqpTVGCGWJOeKhMMZNFtwiXGGBWXjPYe_tAX7VHrVZqnpvoKxLYfYFxRbMNVF59P1NY1V_7pWeYFCRc9l-R4ltOBOeAfq96HQvxViB6NbfHuQKILdBzqxUQIRjUfyEu4lX3unbEvFdMLmZQYuQo6QuAfQH48bd2GpiO3KRqo9uO8loYxqpTg9t10FN3eDrxT06bh2qUXmVOvFcpwYEWdRw3RkgPgwk4RDGS0Dg=w1026-h1362-no

On the downside, my setup for that slit was suspect, and I learned a lesson. At the cost of one tooth on the saw: If your work's not squared up, don't expect the vice to hold it stable. D'Oh.
I haven't put a DTI on the saw to measure its run-out. I do know the miss on the diameter of the seat makes the saw give a rhythmic chunk-chanck as it cuts - amazing how out by a couple of thou is so audible.
But I think it's good enough for its next use as I contemplate Harold Hall's simple dividing head and its split bearings.
 
Last edited:
Slitting saw trivia. In the '90's (early days of horizontal drilling) I toured some shops making slotted liners. It was kind of a lathe bed concept but used ganged hydraulic motors turning individual slitting saws all bathing in cutting oil. It made a pattern of cuts, heads lifted, rotate the pipe some degrees, maybe an axial jog, rinse & repeat. Lots of chunka-chunk sounds there. I recall they had a dedicated re-sharpening machine that ran non-stop, stacks of blades, must have been hundreds. 10m casing lengths, 6-8" diameter, 800-1600m per well, thousands of wells... A lot of pipe must have went out that door. Still used but different methods these days, especially in thermal ops.
 

Attachments

  • SNAG-2022-08-15 10.57.08 PM.jpg
    SNAG-2022-08-15 10.57.08 PM.jpg
    47.4 KB · Views: 13
I have a very high quality arbour I got with my mill/drill 10 years ago, and a crappy one I got on ebay this past spring by mistake. Both have that musical chunk a chunk a chunk sound. I wonder if it's the arbour or the blades?

Listening to you guys, it might even be intrinsic to slitting!
 
Back
Top