Restoring Beaver VBRP Mill

[Peter_HParticipant @peter_h]

It seems that the two parallel faces, 0.7351 ins apart, sit horizontally in the machine. The scraped face then slopes back from the table and fits under Vee of the table. So moving the gib along the direction of table movement will move the scraped face closer or further from the Vee of the table, thus adjusting clearance. In that attitude, the slot is on the outer end of the gib and cut vertically into the top edge facing the operator. The previously mentioned blind hole and witness mark are in the unscraped sloping face of the gib closest to the operator.

This is very difficult to describe in words!.

 

Hang on… erm, I have described the table gibs. Your picture looks like you are missing a carriage gib. Which is it?

 

 

 

Edited By Peter_H on 20/06/2018 17:31:09

[Mark RandParticipant @markrand96270]

The one that Martin is missing is the one between the knee and the saddle. I didn't realize that the table gibs were tapered on the MkII. They certainly made a lot of improvements from the Mk1 !

Edited By Mark Rand on 20/06/2018 19:18:45

[Peter_HParticipant @peter_h]

I can't remember the details of how that one is fitted, I think it is pushed in as far as necessary against the taper by the screw in Martins photo, and locked by several gib screws on the right of the casting. It is over ten years since I last stripped it though. I do have a spare however, which I just measured.

The gib has a single simple taper. It is rectangular with parallel sides 0.745ins (18.923mm) apart. The tapered sides are 0.496ins (12.598mm) at the narrow end and 0.658ins (16.713mm) at the wide end. The two parallel side are machined and the two tapered faces are ground and scraped. Hardened steel again IMO. There is a small groove about 30 thou wide and 30 thou deep across the top parallel face at the wide end, about 0.15ins in from the end. The gib is 241mm long overall.

[Martin ZuzákParticipant @martinzuzak89452]

Hello Peter and Mark,

Thank you for your help. I really appreciate it.

Dimensions what you measured are very similar what I measured. See picture how I measured angle tapered side. I used sinus ruler + (I dont know how to say in English, You will understand from the picture.)

The taper is 1 degree.

I will make drawing and show to you.

[Peter_HParticipant @peter_h]

I would call it a Sine Bar. Yes, dimensions sounds very similar. The wear on the part I have would count for some discrepancy. Given that the original part was probably Imperial, and allowing for wear, my guess of original dimensions are :

length = 9.5ins = 241.3mm

parallel height = 0.75ins = 19.05mm

narrow part of taper = 0.5ins = 12.7mm

0.5 + (9.5*sin(1)) = 0.66579ins

which is consistent with 1 degree taper

[john O’Sullivan 4Participant @johnosullivan4]

Good evening,

have an old beaver mill landed into my garage and hope to get in running over new few months once finish the house build.

My 2 issues are suitable power supply and replace the splined handles what are missing

[Mark GuyParticipant @markguy26995]

Hi I have a Beaver mk1 VBRB and last night I had a disaster with the power feed. The feed ran to the stop to the right of the bed. The motor and change gears all turn but not the lead screw. I was wondering if the was a shear pin on the drive somewhere. Any advice would be much appreciated.

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