Search found 1548 matches

by Torch
Tue Nov 01, 2016 9:13 pm
Forum: 3-in-1 Metalworking Machines
Topic: Thread Gearing on a BT800
Replies: 19
Views: 18637

Re: Thread Gearing on a BT800

TechTony wrote: All is working well now.
Hurray! Have fun!
by Torch
Tue Nov 01, 2016 5:31 pm
Forum: 3-in-1 Metalworking Machines
Topic: Thread Gearing on a BT800
Replies: 19
Views: 18637

Re: Thread Gearing on a BT800

<lol> There's the problem all right. You see the 1/4 round cutout in the steel block? That needs to be positioned around the leadscrew so the gear can engage. Undo that one bolt, position things correctly and reinstall the bolt. Rotate it slightly around the bolt to fine tune the gear lash.
by Torch
Tue Nov 01, 2016 8:31 am
Forum: 3-in-1 Metalworking Machines
Topic: Thread Gearing on a BT800
Replies: 19
Views: 18637

Re: Thread Gearing on a BT800

A picture might help ;-) The thread indicator may be mounted with a single bolt. Loosen the bolt and roll the thread indicator into the leadscrew to engage. Bear in mind that the thread indicator does NOT move when engaged and the lead screw is turning. IE: if you engage the half nut while the carri...
by Torch
Tue Nov 01, 2016 4:20 am
Forum: 3-in-1 Metalworking Machines
Topic: Thread Gearing on a BT800
Replies: 19
Views: 18637

Re: Thread Gearing on a BT800

Good, you have it correct now (provided you shifted the headstock lever to the II position), and Yes, I realize B and C are a compound gear, and do not separate. That's typical of this style gear train. But don't use both sets of teeth! If both A and D are riding on the same set of teeth -- B OR C -...
by Torch
Mon Oct 31, 2016 8:52 pm
Forum: 3-in-1 Metalworking Machines
Topic: Thread Gearing on a BT800
Replies: 19
Views: 18637

Re: Thread Gearing on a BT800

B and C should be the same gear -- doesn't matter if its the 127 or the 120, but don't mix and match. 127/120 is used only to thread metric threads on an imperial lead screw. A is 72, as shown and D is 39. Set the headstock lever to II. Take a very very light cut -- just scratching the surface -- an...
by Torch
Sun Oct 02, 2016 3:20 pm
Forum: 3-in-1 Metalworking Machines
Topic: 3 in 1
Replies: 10
Views: 7939

Re: 3 in 1

If you have one instrument, you learn to play it very well. You play it like nobody else can. You know its "feel" and limitations. +1 So then read here about different 3 in 1 machines which don't cost near that money but beg some improvements along the way. +1 again. I have had a 3-in-1 for 5 or 6 ...
by Torch
Mon Sep 26, 2016 8:33 pm
Forum: 3-in-1 Metalworking Machines
Topic: Toolpost sizing
Replies: 26
Views: 18622

Re: Toolpost sizing

Btw, Torch, what is that lever thing on the right side of your compound? I like the coiled flat-spring leadscrew cover. Did you buy that, or is that something you made? The "lever thing" is my table lock modification. The original locks were thumbscrews. I documented that mod here . I ordered the o...
by Torch
Mon Sep 26, 2016 2:56 pm
Forum: 3-in-1 Metalworking Machines
Topic: Toolpost sizing
Replies: 26
Views: 18622

Re: Toolpost sizing

Your "BT800" is the same machine as the HQ800 made by Anhui Chizhou Household Machine Tool Co., Ltd. Even the part numbers in the manual reference the HQ series machines. Mine machine is the HQ800V (same chassis as yours, but variable speed). The B or 200 series size tool post was the best size for ...
by Torch
Mon Sep 26, 2016 3:27 am
Forum: 3-in-1 Metalworking Machines
Topic: Toolpost sizing
Replies: 26
Views: 18622

Re: Toolpost sizing

You will likely want either an "A" / "100" series or a "B" / "200" series Quick Change Tool Post. The "A", "B", etc. type designation is Aloris sizing. Yuasa, Phase II, etc. use 100, 200, etc. AXA = piston type = size 100 (2 1/2" wide, 14mm dia t-nut) = 1/2" tool bit, 3/4" boring bar = model 250-100...
by Torch
Tue Aug 16, 2016 5:22 pm
Forum: 3-in-1 Metalworking Machines
Topic: Shoptask 1720
Replies: 197
Views: 60604

Re: Shoptask 1720

Keyair wrote:Any ideas?
Yeah: try a new capacitor.
by Torch
Tue Aug 16, 2016 6:13 am
Forum: 3-in-1 Metalworking Machines
Topic: Shoptask 1720
Replies: 197
Views: 60604

Re: Shoptask 1720

I am a little concerned about the slack in the cross slide I mentioned earlier. Is there a way to measure wear? What exactly do you mean by "slack in the cross slide"? Fore and aft against the crank? If so, that's normal and called "backlash". You have to learn to work against it. Or do you mean si...
by Torch
Mon Aug 15, 2016 10:22 pm
Forum: 3-in-1 Metalworking Machines
Topic: Shoptask 1720
Replies: 197
Views: 60604

Re: Shoptask 1720

Keyair wrote:The spindle moves well, with no obvious slackness, roughness, or tight spots. If I spin it by hand it feels fine, if a little tight... it will complete a full rotation if I spin it...
They are supposed to be a little tight -- the bearings are pre-loaded to minimize play.