Search found 89 matches

by johnfreese
Mon Aug 13, 2018 9:29 pm
Forum: Welding
Topic: Brazing Brass
Replies: 31
Views: 419

Re: Brazing Brass

Be careful considering a backing late. If this is a part that coordinates opening multiple doors the distance from the pin to the back of the unit may be critical to it working correctly.
by johnfreese
Mon Aug 06, 2018 8:59 pm
Forum: Live Steam
Topic: How to drill and ream a large-ish hole with drill press.
Replies: 15
Views: 644

Re: How to drill and ream a large-ish hole with drill press.

I don't think the D drill leaves enough material for reaming. I would spot drill, then drill 1/64 under nominal, then ream. The rule of thumb I follow is ream at 1/2 the rpms you drilled with and double the feed rate. I do not favor drilling pilot holes and following that with the full sized drill. ...
by johnfreese
Mon Aug 06, 2018 8:44 pm
Forum: Milling Machines
Topic: BIG Dro Problem
Replies: 27
Views: 624

Re: BIG Dro Problem

I have a relatively new Bridgeport clone. I see a change of a couple tenths when I lock the Y axis. I don't see it often on the X. There must be a little clearance in the slide ways in order for them to move without binding. When you tighten the clamps you are pushing the gib against the sliding mem...
by johnfreese
Wed Jul 25, 2018 8:01 pm
Forum: Lathes
Topic: metric change gears [found]
Replies: 9
Views: 389

Re: metric change gears [found]

Glad you found your gears. I am stuck making a 40 tooth and a 127 tooth for my Nardini.
by johnfreese
Fri Jul 06, 2018 11:13 pm
Forum: General Discussion
Topic: Keyways
Replies: 15
Views: 1581

Re: Keyways

If you use a Woodruff cutter to mill a straight keyseat there is no need to mill undersized then open up the keyseat to dimension. The woodruff cutter controls the width. Use this technique only on a keyseat at end of a shaft. If you do it in the middle of a shaft it can't be disassembled. The key r...
by johnfreese
Sat Jun 23, 2018 8:09 pm
Forum: General Discussion
Topic: Is MSC Totally Useless?
Replies: 45
Views: 4242

Re: Is MSC Totally Useless?

MSC not only killed off Enco they also killed off J&L, one of my favorite vendors. Recently they acquired Deco Tool. I wonder if Deco will survive under that name or if they will disappear into the MSC giant. Because of the small volume of my purchases and MSC's prices they are absolutely my last re...
by johnfreese
Sat May 26, 2018 8:51 am
Forum: General Discussion
Topic: 4130 chromoly
Replies: 5
Views: 892

Re: 4130 chromoly

The material in the annealed state turns and drills easily. Speeds will be a bit lower than for mild steel, about 85 sfm for HSS tools. Both carbide and HSS work well. In the re-hardened state it can be turned and drilled relatively easily. Speeds will be about 70 sfm for HSS tools. As to the design...
by johnfreese
Fri Apr 13, 2018 6:33 pm
Forum: The Junk Drawer
Topic: How to Get Hydraulic Coupler Off?
Replies: 16
Views: 1485

Re: How to Get Hydraulic Coupler Off?

I have worked on a fair amount of mobile hydraulics. Getting room to swing a wrench is usually a problem. Often some components need to be removed to get the wrench on the fitting you really want to work on.
by johnfreese
Fri Apr 13, 2018 6:25 pm
Forum: Lathes
Topic: Cross slide and compound dials
Replies: 20
Views: 2180

Re: Cross slide and compound dials

You can do it on a rotary table without index plates. Create a table in Excel giving the angular position for each division.
by johnfreese
Fri Apr 06, 2018 4:08 pm
Forum: Buy, Sell, Trade, Wanted, Free!
Topic: WTT:7518 Porter Cable Router
Replies: 3
Views: 671

Re: WTT:7518 Porter Cable Router

If you will settle for a piston type BXA tool post, I have one.
by johnfreese
Mon Apr 02, 2018 4:46 pm
Forum: Lathes
Topic: Tightening a scroll chuck
Replies: 3
Views: 816

Re: Tightening a scroll chuck

I have a 6" Buck adjust-true chuck and an 8" Pratt Burnerd adjudt-true. They only have one pinion so I don't give a crap about which pinion to use. I suspect that where you have 3 pinions to choose from the most important thing is that you be consistent in which pinion or pinions you use when tighte...