compressors

[blichney]

Im looking to find a used thomas t80, gast pca-10 or pcd-10. Also has anyone found any suitable oilfree alternatives to these?

 

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[winners58]

I use a speedy for my 4" dredge
Bonaro used a speedy with a harbor freight motor
photo;http://www.treasurenet.com/forums/gold-prospecting/337310-hookah-system-3.html#post4713716

bids on a Gast
Gast PCD 10 Oiless Piston Air Compressor for Hookah Scuba Gold Dredge Diving | eBay

speedy/brown
Vintage w Brown Speedy Oilless Air Compressor Dredge Diving Paint Sprayer Hookah | eBay
Vintage Speedy Air Compressor for Dredge Diving Paint Sprayer | eBay

Wards Powr- Kraft
Wards Powr Kraft Air Compressor 75 6603 115 V 60 Hz 6 1 Amps 1 3 HP | eBay
http://www.ebay.com/itm/252112472032?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT

12v oil-less
Puma 12 Volt 1 5 Gallon Oil Less Air Compressor Free Shipping Oiless 12V | eBay

12v Gast
Gast 2HAH 19c M322 12volt Air Compressor Off Road Jeep 4 Wheeler 4x4 | eBay

for the mechanically inclined convert an electric Gast useing pillow blocks or take the winding's off and cut the side of the motor casing for the belt.
the one I have that's still setting in a box I paid $40 for maybe I'll get to it! heres an example;
Gast Air Compressor | eBay

you can see my speedy in the background;

 

[blichney]

Thank you winners58! That greatly broadens my search. I didnt know about the speedys, wards or pumas. How do you like your speedy? Can you still easily get parts to rebuild them?

 

[winners58]

probably cant get parts for the speedy maybe new old stock but you can get diaphragm material if that needs replaced
find one that works good not all roached out, I puled mine apart cleaned it with rubbing alcohol,
I used USP mineral oil on the springs and valves, and went to the fabric store for new felt filters.
puts out more air than the thomas, I used a pressure gauge to set it at 40psi it would put out 55psi easily.

 

[blichney]

Well i couldnt resist i bought a speedy! I guess next question i have is what size pulley do i need to make it 1800 rpms? I have a honda clone 6.5 with a keene p180 and the keene pulley behind the pump.

 

[winners58]

the speedy only needs 1500rpm I just used the one it came with, and haven't had any problems
a motor can be tuned to 3600rpm but come from the factory much lower, mine runs about 3000rpm
this calculator will also give the size belt to get Pulley Calculator. RPM, Belt Length, Speed, Animated Diagrams
(edit) one thing I find out is after you take off the head the diaphragm & plate unscrew to get them off.
.

 

[blichney]

Thanks again. Youve been most helpful! Cant wait to get my dredge in the water!