Showing posts with label startrite rebuild. Show all posts
Showing posts with label startrite rebuild. Show all posts

Saturday, December 16, 2017

We Test The Startrite Saw

So I spent the afternoon setting up and testing the Startrite saw. After tensioning the blade, I checked tracking, made a small adjustment to the idler wheel so blade ran close but not tight to step. Loosened the blade guides and let them find their level on the blade re-tightened them. Using a strip of standard weight writing paper, set the guide clearances. And finally, double checked that the vise jaws were square to the blade.

So does it cut metal? I decided rather than fool around with  home brews, to cut dry for now, when its out in the garage/workshop I can play around with some of the ideas for wet cutting outlined in the previous post.

To start I chose a couple of chunky hunks of metal from storage. In the picture below, the first one is a 5" diameter hunk of aluminum. I want to cut the circular plate to utilize it as a lathe dog driver or other project the rest will be feed for the melting furnace. The second hunk of metal is a 4" mild steel pipe with a welded base. Before it was scrapped it had been the mounting base for one of those old "huge" satellite dishes. I want to keep the assembly, so I will just cut a ring of ruff metal off the end to clean it up.

First set the blade speed 225 fpm for aluminum.

Two pictures of the cut.

Next the mild steel 4" pipe, speed 160 fpm.

Three pictures of the cut.

The results, the cuts went smoothly and much faster than my little 4X6 import. The cuts were very accurate, no play what so ever in my square, and the aluminum disk will only require a couple of facing passes to finish off.

So thats it for this project. I will set this saw up in the welding area of my new workshop, old garage/workshop. It will handle all of the larger cuts rather than abusing my smaller saw and abrasive chop saws the way I have been doing.

Friday, December 15, 2017

Startrite Saw Complete

So  I took my time on this project, but it is now complete, and none to soon with Xmas coming. So here are the centerfold pictures. A great looking saw, wasn't long ago I could only dream of having a saw like this for the price I put out.

So here is the heart of the electrical harness I just completed. The box contains  a 12 point connection block and a system over load reset. The motor has double coverage as it has it's own overload reset.

The little red button on this limit switch controls everything. With the head in the full down position, the limit switch cuts power to the coolant pump and the start coil on the motor start switch. The contact plunger has fine adjustment.

Here is the coolant pump switch and the blade speed plate.

So she takes a fine picture, but can she cut metal? Coolant is not available locally and nobody will ship it. So I will have to do with out, till I am in Timmins or Sudbury, to pick some up. There are home brew recipes that many have used with success. Heres one recipe:

Home Made Coolant

Here is a recipe for some home made coolant. At a cost of around 50 cents a gallon

1 quart cheep motor oil 

3 cups liquid dish washing soap 

4 gallons water

The water acts as a coolant and the oil acts as a rust preventative  Adding the soap will allow the oil to mix with water. If you want water soluble cutting oil substitute the motor oil with black cutting oil.

If you get a sticky residue on your machine you have to much soap. If mixed just right you will get a thin layer of oil on your machine and tools after the water evaporates. 

There is a secret to making this work however. You must add the detergent to the water first and then stir in the oil to the soapy water a little at a time. If you just add them all together in the same container all at once, they don't mix very well.

Use at your own risk, I have not tried it yet. For me this presents another problem, my garage/workshop is not heated yet and it will freeze. Others have tackled this problem in a different way. Here is an idea quoted from a forum that escapes me now.

 Re: Band saw cutting fluid recomendations???

For most home hobbiests, these saws can be run dry with no noticable effect on blade life. The biggest broblem with these saws seems to be the el-cheapo blades that come with the saw, and the same blade that most people use for a replacement. I have found that Lenox brand blades are some of the best on the market. They can be found through several on-line retailers in the sizes you need.

That being said. If you wish to use coolant on your saw, a readily available and cheap alternative is windshield washer fluid. In an unheated shop, it will not freeze, it is non-corrosive, and the alcohol content does a good job of cooling through evaporation. It also does a fine job of flushing chips from the cut. I find this benifit more important than the actual cooling. Keeping the chips out of the path of the blade helps the blade to work more efficiently, therefore creating less heat in the first place. In any non-abrasive cutting of metal, the object is to direct the heat of the cut into the chip, and keep the heat out of the work-piece. It leaves no oily residue, and can simply be wiped off with a dry rag and ready for welding.

Again I have not tried this, so use at your own risk. I think  until I have heat in that shop this is my best option, the detergents will keep the saw relatively clean. Few solutions are ever perfect solutions, the alcohol content makes it highly flammable, so take care to keep sparks and flame away and keep an extinguisher close by. 

So I will make some cuts with the saw later today or tomorrow and post some pictures.

Cheers All

Monday, December 11, 2017

Startrite Blades Finally Arrived

Well look what arrived today, didn't expect them till Wednesday as they didn't arrive in Toronto till last Friday. I ordered them from Westway Machinery in Toronto but these were custom length, so they had to be ordered from the manufacturer in the States. Coupled with mayhem at the border because of cyber Monday, it's been 3 weeks since the order went in. Better late than never ha ha.

These are industrial quality Lenox blades, well worth the wait. I purchased 3 vari-tooth 8-12 tpi for thinner work and 2 vari-tooth 6-10 tpi for thicker work. At 38 bucks Canadian they are not cheap but with reasonable care I shouldn't need another blade.

Here installed on the saw. Perfect fit, lots of room left for adjustment.

Will still require some checks and adjustments when it gets powered up.

So electrical and close it up and were done, later this week.

Sunday, December 10, 2017

Startrite Saw Coolant Tank

Completed cleaning and painting the coolant tank and installed the coolant tubing. Here are some pics. First the completed tank installed with pump and tubing.

Here a look inside, the pump on its hanger and the supply and return tubing. I did not paint below the expected liquid level. The old paint had all dissolved which means it contributed to the plug-ups.

Here the tubing to the blade guides. 

While the tank finished drying today I took advantage of the break in flurries and  cleaned my lane way and turn around area so here's another updated picture of my porch and garage build in winter conditions.

Thursday, December 7, 2017

Startrite Coolant Pump

Spent a couple hours puttering around in the shop this afternoon. The power cord was hardened and cracked in a few spots on the coolant pump and it was gummed up with grease and dirt, surprisingly still ran though. I opened it up and replaced the cord with a new cord, reassembled with a new o-ring seal.

All cleaned up with new cord. The bracket hanger still needs paint, tomorrow.

The coolant return hose was longer than it needed to be. I cut a ft. of hardened hose off of the tank end. There was a solid 4" long plug of metal chips and dirt in the middle, managed to get it all poked out and cleaned up. I don't think the saw was ever cleaned out or the coolant changed, when everything plugged up they just stopped using it. Installed the cleaned out hose on the drive end return.

So left the dirty job for last. Got started cleaning out the coolant and pump tank. The crud was an inch deep in the bottom.

Hopefully get the tank cleaned up and painted tomorrow. Haven't checked yet , hopefully have the fittings I need for the coolant tubing. After that just the electrical, paint and reinstall a few plates to close things up, and were done. I was informed today my new blades are delayed till early next week (something about border mayhem due to cyber Monday).

Wednesday, December 6, 2017

Startrite Saw Top Blade Guard

So we started early looking for the right material to build the top blade guard that was missing. Without a complete drawing of the part, some of this is by the seat of my pants. If I get close to the original, great.

In the first picture is a length of light 2 1/4" square tubing, I cut it lengthwise on the diagonal. Most of the material I had was either too light or too heavy and this will save me a couple of bends.

Here the two parts of the assembly are formed and the slotted guide tab is welded on the outboard end of guard.

Thickness was a little to heavy to bend on my 2' brake so I grooved the bend lines with my trusty Makita grinder and then bent them on the brake.

Getting a accurate weld of the two parts was a little tricky but that is were my welding fixture came in handy. Once lined up and clamped I positioned the weld area for an easy flat weld.

The next two pictures, painted and ready to install. Front and back.

Installed on the saw, Easy fit the first time.

Here adjusted for maximum capacity.

Here extended for smaller work, slides easy and can be removed instantly by loosening one nut.

Not sure what Startrites design for the outboard end looked like, but this works great. The slotted tab supports the end of the guard and prevents movement which may bring it in contact with the blade or wheel. Adjustment and removal are trouble free.

Tuesday, December 5, 2017

Startrite Saw Blade Guides Completed

So took a while but I got the blade guides completed. Lots of small parts to clean and two of the bearings had to be replaced, both gummed up and the seals gone. Took a while to find replacement bearings, the zip lock bag I keep small bearings in was not in my two little red tool boxes I keep my bearings in, eventually found the bag on a shelf (got to stop doing that,lol). In addition to the two side ball bearings in each guide there are also three carbide inserts to guide and support the blade.

Here is Startrites part drawing for the guides.

Here are all the parts for the two guides. Bottom right the guide block is all assembled ready to mount on the guide arm. Bottom left, the guide block only has the top carbide insert and coolant valve installed the rest of the parts are laid out beside it, you can see the two side carbide inserts and the mounting screws with the two new bearings.

 In this picture both guide blocks are assembled and mounted on the guide arms.

In the next two pictures both arms mounted on the saw in the raised and lowered positions.

You will notice there is a part missing. There is a blade guard for the drive end but no blade guard could be found for the head end, part no. 11 on the drawing. Someone probably got tired of removing it for blade changes and didn't bother replacing it, ha ha. Not really needed to run the saw but for safeties sake I'll see if I can make one up tomorrow.

Saturday, December 2, 2017

Startrite Blade Brush Installed

So did not do much in the shop today, got a few hrs in there between cooking and cleaning (yes I do that, lol). I first cleaned up the parts for the blade brush. The old wire brush was done, so I dug around in my wire brush drawer and found one close to the same size. I drilled out the pressed in shaft to match the threaded shaft on the brush assembly. After painting the main bracket and baking the finish on the wood stove, I assembled all the parts and installed on the saw.

The first two pictures are the cleaned parts front and back, the new brush is assembled on the shaft and the old brush is top left corner.

The finished and assembled brush. 

Everything on this saw is replaceable or adjustable for wear, even the blade brush

Here assembled on the saw, a look inside.

And a look from the outside.

So suppers waiting, a big serving of my favorite very cheesy, cheese and macaroni casserole.