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I have seen some very large engines made with foam. They a chemical bond sand but is was a engine for a ship. For small engines I would use sleeve engine. Make a outside pattern then make plaster cast. Use wax sheets inside the plaster cast for core. Dave

Most do not most gears before 1900 was just sand cast. Back around 1975 I made pattern for friend for bridge crane power operator. It was about 10" diameter. Later he decided for advertising to run gear teeth over a milling cutter for better finish. I lot farm equipment used cast gears...

Most aluminum foundries use either 5/32" or 3/16" shink. There is for pattern work double shink too I that was 5/16" shink I have shink rules for all 3 scales. Handy to have around even using Autocad Dave Dave

Where we had molding was concrete. The roller covyers was over just earth and furnaces was too. Did not spend money on concrete for pouring and furnace area. I was told by ones in the foundry industry to put sand on floor , so I just not wast money on concrete. Any doing molding did not...

Try this when I was talked to doctor or nurse about moving around. I told with did the day before. That require a ½ hour or long why I should not work the AC electrical. Do not get on Ladder Do not get on roof Do not work electrical Do not work on 110°F day. Later did not about roof...

I think important to know not to use some words around Avation not because bad but taken the wrong way. I know on this site a lot uses FedEx and UPS for shipping and just do not think about the word you may use most time. ======================= Some things no one will say even print today...

FedEx has new pricing for lower cost shipping this year on small heavy boxes. I was down FedEx shipping. The want my driver's license. I start ask why I stop short . They keeping track just in case. I did not use the B work . We are talked the what B17 , B24 and B29 was built to care. Do not...

The varistor is surge protection is a lot electronics. It is a one shot protection like fuse. Can be real pain to replace. They are solder in to board. They are use whole house surge protection in some parts of USA. It will not protect electronics on same side as the varistor. It comes in...

Welcome to the group Dave

Welcome to the group Dave

Here is the technical data on the aluminum tape for anyone interested . Make Insulation easy. Dave

This only need on a wide range variable speed motors. The cost to save motor was under $14.00 and about 1/2 hour installing. No electrical just a good tape to motor. Most motor running on hight does not need any type of gauge. Seen more on mini lathes and mills variable speed motors. It...

This after the mini lathe ran for a ½ hour . It nice seeing temperature the motor is running not after I see smoke. Dave

I add a temperature gauge to my mini lathe. The mini use a variable speed motor. On low speed the motor does cool very well . So need watch temperature at low speed heavy cuts. The max motor is 105°C. Less the temperature to outside of witch is 15 to 20°C. I set red mark at 80°C just for a...

Welcome to the group Dave

Welcome to the group Dave

Over 200 letters for each size So 6 size x 200 letters is over 1,200 letters There is also starts , arrow, comma and list goes on. This is for all letters I have Dave

If came by my house I would give the letters and wax for free. The $30.00 is for going to FedEx and boxing. Dave

Yes I have lots foundry letters Full alphabet ⅛ to ¾" will give pattern wax too . $30.00 plus shipping. Dave

Welcome to the group Dave