Pumpy the Younger

Description

Another Oil Pump. Better Version Than The Last One. This One Should Work With 3/4" Pvc Electrical Conduit And Female Threaded Adapters. <Strike>Use Conduit Threaded Adapters, The Threads Are Not Tapered In These As They Are In Water Pipe.</Strike> Regular Water Line Pvc Female Threaded Adapters Work Fine. Also This Version Only Needs A Cross Hole To Attach The Piston To The End Of The 1/4" Rod. You'Ll Need: 3/4 Pvc Shc 40 2X 3/4 Female Threaded Adapters 1/4" Steel Rod- Ground Or Polished (Or 6Mm If Using That Version) 1/8" Or 3Mm Packing String (Cotton String May Work) For The Packing Gland 20Mm X 2Mm O-Ring For Hose Barb Fitting 3X 21Mm X 2Mm O-Ring For Piston 2X 30Mm X 3Mm O-Ring For Top And Bottom 1/4" Shaft Collar To Preload Spring (Or 6Mm If Using That Version) Spring For Valve - Something Just Over 10Mm Id, With A Few Pounds Of Force. Can Be Adjusted Some By Position Of Shaft Collar 5/8 Or 16Mm Steel Ball For Intake Valve 2X 1/8 Or 3Mm Screws To Use As Cross Pins On Piston And Handle. <Strike>Turn Supports On For The Piston, Maybe 70° Or So, The O-Ring Grooves Hang Down A Bit On Their Upper Edges.</Strike> Use "Nosupport" Piston Or "Packing" Piston, Supports On These Grooves Will Be A Bear To Remove Without Damage To Piston. The Top Needs Supports To Build Plate Only,<Strike> If Your Printer Can Handle The Horizontal Threads Without Them. Otherwise About 70° Here Should Help, And The Support Can Be Unscrewed.</Strike> Tried Supports In Threads, Ended Up With A Stuck Boogered Mess. There'S Plenty Of Clearance In The Threads, And I'Ve Uploaded A Chaser. The Hose Barb Will Need Support As Well Of Course, Keep The Barb Facing Down And Support Should Slide Off After Cracking Loose. The O-Rings On The Top, Bottom, And Hose Barb May Be Able To Be Replaced By A Few Wraps Of Teflon Tape. The Piston O-Rings Will Pretty Much Be Mandatory Though. The 3/4 Pipe Will Need Chamfered On The End Where You'Ll Be Inserting The Piston So The O-Rings Have A Smooth Entry. The Female Threaded Fittings Should Be Glued Onto The Pipe And Allowed To Dry Before Assembly Begins. Your 1/4" Rod Needs A 1/8" Cross Hole Drilled About 1/8" From Each End To Attach The Handle And The Piston. 05/08/2018 > ► Added Files With Enlarged Holes For The 1/4 Shaft. Mine Printed Out Too Small. These Could Be Reamed With A 1/4 Drill Bit Just Fine Otherwise. All Files Beginning With "7" Have The Enlarged Hole. Should Come Out A Few Thou Over 1/4" > ►Added A Piston That Uses Packing String To Seal Instead Of O-Rings. Print "7_Piston_Packing" And "Piston_Packing_Gland" Then Use A 3Mm X 10Mm Screw To Join Them. Set This Screw About 2-3Mm Or So From Bottoming Out, You Want The Bottom Of The Piston Shank To Still Be Inside The Recess Of The Gland Slightly. Now Wrap The Recess With Cotton String, Out Even With The Outer Surface And Trim. Tuck The End Of The String Under Another Wrap And Insert Into Your Pipe. Now Use Your Allen Wrench Or Screwdriver To Snug The Screw, This Will Expand The String And Create A Seal. Just Like The Packing Gland On Top, Too Tight And You Won'T Be Able To Move It, It May Be Touchy To Get It Just Right. If You Can Make The Top, Bottom, And Hose Barb Seal Well Enough With Teflon Tape Then Using This Piston Will Free You From Any O-Rings. > ►Added "7_Piston_Nosupport" File. This One Has A Slight Taper Above Each O-Ring Groove, So It Should Print Without Supports. > ► Added "7_Handle" File. Also Coned The Top Of The Rod Hole To Make It No Support Friendly. > ► Added "Chaser" File. This Is To Clean Up The Threads Female Threads On The Top Where The Hose Barb And Packing Gland Thread In If Needed. I Didn'T Need It Personally. 05/09/2018: > ► Changed The Hose Barb. Added A Taper At The Base Of The Barb. This Accomplishes Two Things. First, It Makes The Barb Stronger. Second, It Moves The Support Material Out And Gives It More Wiggle Room When Removing Supports So You Don'T Break Off The Barb Like I Did. > ► Added A New Foot Design With A Retainer To Keep The Inlet Check Ball From Rising Too Far. > ► Renamed The Original Files To "6Mm" These Were Undersized For 1/4" Rod, But Should Fit 6Mm Pretty Well. 6Mm Chrome Plated Linear Shafting Is Cheap On Ebay And I'Ll Probably Go This Route Myself. Will Need To Be Softened On The Ends, But A Propane Torch Will Handle This Fine. If You Want To Use 6Mm Linear Shafting, Use The Files That Begin With "6Mm." For 1/4" Use The Files That Begin With "250." 05/10/2018: >►Noticed A Microscopic Gap In The Retainer Model. Fixed And Reupped. >► Added "Mounthalf" File. Should Clamp Around The 3/4 Pipe And Provide 4X 8Mm Mounting Holes On A 50Mm X 50Mm Square. Should Work Nicely To Mount Pump To A Bucket Lid. >►Found Another Microscopic Gap In The Foot_Retained Model. Fixed And Reupped. Tinkercad Must Do Some Rounding Off Of Dimensions.

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