BV25 Lathe?

John

When you've finished stool studying please can you check your store and address the gripe stock level.

Ian

<Posted by David Clark 1 on 07/12/2012 20:13:59:

<Hi Ian

<Just forward to www.homeworkshop.org.uk

<John Stevenson can store them for you.

<regards David

I meant to say. I'm fine with rotating the topslide whenever its required, all I wanted to know is what are the angular limits (and tolerances) for continent recognition?

Ian

I don't have a topslide either, although that's mainly because I haven't got one my tiny little Emco Compact 5 came without a topslide ( and half the tailstock missing and only one set of jaws for the chuck - good job it was cheap )

Tell you what, they might not be something that gets too much use, but it's a pain in the fundament when you need one and haven't got it.

It has to be Autsralia or South Africa as they have to rotate the topslide the opposite duirection to North America due to the coriolis effect.

Neil

Axminster BV20 on Ebay at the moment. Item 290827970256

Perhaps a little late but for those interested in more information on the model BV25 lathe. A very careful look at figure 4 in the article will reveal the logo for Adendorff Machinery Mart a Johannesburg based company similar to Machine Mart. Their machinery brand name is Mac-Afric (similar to Clarke for Machine Mart) Web address www.tooltime.co.za. (Worth a look for a change).The BV25 is shown on page **LINK** where you can download a sales leaflet and the operatring manual :

**LINK** for the sales leaflet

**LINK** for the 30 page operating manual and parts diagams.

John C.

Hi

I found this topic In MEW Forum. If you Google "bv25b-l lathe" it brings up lots of dealers selling this lathe.

This was the lathe I bought for my home workshop and did some modifications-improvements to get a better performance.

The Topslide angle that several mention is totaly down to personal preference myown being as follows.

The angled topslide set at 29.5 degrees is what is used for thread cutting 60 degree threads

1) Set the tool to touch the workpiece and set Crossslide Dial to zero.

2) Move apron to allow the tool to advance on the Crossslide and advance the tool to the depth of thread required.

3) Zero the Crosslide Dial again.

4) Zero the Topslide Dial then retract the tool with the TopslideHandle until it will clear the Workpiece by moving the Apron.

5) Advance the tool with the Topslide and take the first cut

6) STOP The Chuck and retract the tool with the Crosslide and REVERSE the Apron with the Leadscrew Engaged.

7) Stop and Advance the Crosslide back to Zero.

8) Advance the tool on the Topslide.

9) Keep repeating 6) 7) & 8) until the Topslide dial reads Zero

If you got it right the Thread just needs tidying up.

Not being nimble enough with my advancing years I have fitted a 180 volt DC motor that extends the Variable Speed range from 40 to 2500 RPM

The original was 115 to 1620 in six steps

Eric

Hi more on bv25 lathe also marketed as Weiss ML260

http://www.machines4u.com.au/view/advert/ML260/28291/

Specs are the same as bv25b-l with a few additions and modifications.

Eric

Hi.

I have a BV25B-L.

I miss a change gear for the thread setup. Its the 75 teeth . Where can I buy one???

I have modified the lathe slightly. New belt wheel on the motor with the original ratio and one track with half the diameter because the 115 rpm speed when turning threads was a bit high for me. I changed the belts from the chinese ones to some from Mitsubishi. There was a rumble when in lower gears with the chinese belt, but with the Mitsubishi there is no rumble and it sounds tight andgod.. Must have been the bad construction in the chinese belts that made this chatter.

The compound where not nice to use as it felt variable hard . I have installed 2 thrust bearings and its as night and day. Easy to use.

i have also put a quick change tool post.-

Am very satisfied with the lathe

Hi Hammerstad

Cutting threads will be a lot less stressful with the spnidle running at 57.5 rpm.

I had the same problem until I converted the drive to "Polly Vee Belts" with three speeds of

115, 87.25 and 57.5 gave muc more control.

The chatter from the gearbox can come from a single phase motor check the reply from

"Ken" he describes how it occurs in great detail

http://www.homemodelenginemachinist.com/f16/single-phase-motor-chatter-17383/

Someone on this forum may be able to help in cutting a gear for you now you have made the call

One Little thing with a BV25B-L lathe change gear is that the diameter in mm = the number of teeth

therefore no need to count teeth just measure the diameter.

Be aware that the ball bearings on the input shaft are liable to fail and kick up a racket

Check that the oil hole to feed the bearings has be drilled correctly as the hole was completly ommited from mine causing failure shortly after I Bought it.

Oil changed and new bearing on the intake shaft and the problem solved.

Eric

I have a BV25B-L about 6 years old , but used only some hours due to bad health.

I do not have the users manual for it. Are there anybody that have this electronically? I would very much appreciate to get it (buy).

Jan-Erik

.

Jan-Erik

John Clipstone's post [above] has a direct link to a free PDF manual of 30 pages.

MichaelG.

Thanks for the answer, but the lathe shown in the links is not the BV25B lathe, some similarities but anther concept.

It has been very difficult to get this users manual and also other info on the lathe.

Jan-Erik

Jan-Erik

Sorry for my error

MichaelG.

I see that the BV25 lathe first appeared in MEW issue 198, with a second article in 199, but despite a "to be continued" we have heard no more about it in the last two issues. Maybe it has been dropped because of the mystery it seems to have created. If so, that seems a pity to me. There are many articles in MEW about machines I have never seen and am unlikely ever to own, but are interesting to read and often contain ideas which can be adapted to my own purposes.

Andy

Hi There

It is back in 202.

We have plenty more articles in the series.

regards David

So it is. 202 dropped through my letterbox an hour ago.

Andy

Exactly! personally posted by David Clark 1. Now when will he get here with mine?

Hah! After careful cross-examination of the Senior Partner I discover she's helpfully put it on the landing windowsill...

Neil