Recent Posts

Pages: 1 [2] 3 4 ... 10
11
Your Own Design / Re: Stephenson's Rocket
« Last post by Brian Rupnow on Today at 07:20:13 PM »
The hole that my front axle sets in was drilled and then reamed to 3/8". When I put the axle in the hole, it was a terribly sloppy fit. I couldn't figure out why my reamer had cut oversize---it never did before. A closer examination this morning showed that I've been METRICED---the 3/8" reamer I had used was a 10 mm reamer, which is 0.394". Don't know what fool put the  metric reamer into the 3/8" reamer stand!!! Then I went to make the eccentrics which attach to the axle, and totally buggered them up. At that point I shut things down and took my good wife out for lunch, then had a walk and an ice cream cone. Now I will take another run at those eccentrics.---
12
My Workshop / Re: A new wind blowing into my shop
« Last post by steamer on Today at 06:55:41 PM »
Take it gently, another couple of days is not the end of the world. One back strain pays for several professional helpers. I decided that when we moved apartments, I pay, my back survives  :wine1:

I hear ya Roger

The only thing I'm driving today is the pinch bar.....things I could do 15 years ago.....aren't there anymore....

Right now it has me blocked between the inside garage entrance and the door entrance...so walking a lot....though my shoulder is not happy at the moment.....

Dave
13
My Workshop / Re: A new wind blowing into my shop
« Last post by Roger B on Today at 06:52:37 PM »
Take it gently, another couple of days is not the end of the world. One back strain pays for several professional helpers. I decided that when we moved apartments, I pay, my back survives  :wine1:
14
My Workshop / Re: A new wind blowing into my shop
« Last post by steamer on Today at 06:49:23 PM »
The 3 H's

Hot

Humid

Heavy!........getting too old for this *#*&*&@#
15
Engine Ancillaries / Re: Fuel injection systems
« Last post by Roger B on Today at 06:37:12 PM »
The element was then moved to the vice for drilling the inlet port and milling the locating flat before moving back to the lathe to turn the locating step. It may have been better to turn the step first  :headscratch: but the finished surface was below the interrupted cut. The element was then heated to middle red and dunked into cold water. The file test suggests that the surface is hardened, I have no idea about the bore  ::) Interestingly I can't even get the 1.95mm pin gauge to enter  :thinking: maybe it's scale or maybe it's some form of growth/distortion???
16
Tooling & Machines / Re: Division Master - Rotary Table Controller
« Last post by Twizseven on Today at 06:08:54 PM »
Finally got round to using the controller.  Found one minor issue in that if the worm gear in rotary table is pulled right over tight into the gear the stepper throws a wobbly.  This was a bit odd at first as the division controller appeared to hang up and would not let any settings be altered or go back to menu and also would not drive the rotary table.  I took division controller off stepper motor and it all worked okay and all menus and settings could be changed as required.  I reconnected it all and put ink mark on back of stepper motor spindle and then could see it was not turning. Backed off worm completely and all worked okay.  Re-engaged the worm gear just a gnats whisker off previous position and all okay.

I want to graduate the dial on the base of the spindle pillar on Stent Tool and Cutter Grinder.  I am giving it the refurb it should have had when first obtained it.  I have a Hemingway graduating tool and not having means of dividing on the lathe (at present) decided to set it up on the mill table and utilise the Division Controller.  Spent some time trying to work out how to hold the graduating tool in such a way that could alter its height and horizontal position.  Remembered I had a Myford Milling attachment that came with my lathe and had never used it.  Had a quick think and machined up a 90 degree bracket to hold the graduating tool.  Came to set it up and realised I had not thought the exercise through properly.  Found I could mount the graduating tool but it would be 90 degrees out.  Drilled few more holes in right angle bracket, tapped couple of extra 4BA holes in the rear of the graduating tool and eventually managed to get a solid set up.  It may look a bit Heath Robinson but it worked.

Put 2 and 10 degree markings for 90 degrees either side of centre position.

I now need to make a carrier for the graduating tool to hold it stationary in the mill spindle and parallel to the X-axis so as to be able to graduate the table clamps on the Stent.

Started to paint the base and pillar of the Stent so can begin re-assembly.

Colin
17
Chatterbox / Re: Sad news
« Last post by awake on Today at 05:58:12 PM »
Bill, so sorry to hear your loss. My prayers are with you.
18
Your Own Design / Re: Longboy's "SIDE SHAFTER" Model Engine
« Last post by Longboy on Today at 05:40:50 PM »
The radiators with their cyl. liners make the premier upon the deck of SIDE SHAFTER. Three 4-40 screws run up through the deck into the radiators and the liners protrude from the underside.  The bottom of the radiators are over bored for a gap between the liners, filled with epoxy to lock in the liners.



The crank webs get dressed with their Traxxas drive members. This part number fits on 1-3/4in. rounds, the webs are 12L14 steel.



And the webs are balanced to the piston/rod assemblies. A counterweight needed to be added to the backside to complete the primary balance. The 6-32 screws need blue thread locker.



The stub shafts are knurled and pressed into the webs....... and the assembly is complete.



19
My Workshop / Re: A new wind blowing into my shop
« Last post by steamer on Today at 05:33:29 PM »
Existing roll around tool box is going!.....WAY too big....
20
Engine Ancillaries / Re: Fuel injection systems
« Last post by Roger B on Today at 04:28:24 PM »
As mentioned in the diesel thread the helix pump had worn to a level that it would not prime. Wear problems in the mild steel body had always been at the back of my mind and I had started a new pump design using a round element made from silver steel in an aluminium body. This would also allow multi element pumps for future developments. I have some concerns about distortion when hardening as I just have a 'Camping Gaz' blowtorch for heating but we will see what happens.
The pump element is generally made as before but has a couple of O rings to seal the inlet side to the pump body and a locating flat to ensure that the inlet port will line up with the one in the body. I was in two minds as to cut the locating step and then the flat or cut the flat and then the step which left more to hold the element with until the final operation.
After reaming the 1.96mm pin gauge would pass through but the 1.97 would barely enter, much as before.
Pages: 1 [2] 3 4 ... 10