CEB Cylinder

Abstract

The OSE CEB press requires a custom cylinder - 5x8x2.5 inch, but with 3.5" of rod sticking out and no rod end.

The 5" cylinders are about $500 - and an open source version can be half of that if we start from honed cylinder tubing. It is useful to open-source that - as that once more turns every cylinder into a reusable module. The main point of open-sourcing by OSE is standardizing to one build method which allows for universal interchangeability of parts and 3D printed seals, such that any cylinder can be reworked or repurposed easily and inexpensively.

Working Doc

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Cylinder Parts

• http://www.baileymanufacturing.com/hydraulic-cylinders

• Midstate Hydraulics Part Store
  • Prince Part Manual - 5" Bore, Max 2" Rod Diameter

Rods

• Chrome rod - a dollar per kilogram - [1]
• Stainless rod - 2-1/2 x 22
• 2" SS Rod - Discount Steel

Tubing

• Honed steel tubing - a dollar per kilogram - [2]
• DOM for 5" Bore - rough cut to spec Discount Steel 5-1/2 x 1/4
• DOM for 4" Bore - Discount Steel

Rod Cap

• 4" Bore, 2" Rod Cap - Agri Supply

Press Parts

DOM tubing

• 4" OD x 2.5" ID x 2.5" long - ?source?
  • alternate - 3.5 x 2.5 x 2.5 - Discount Steel
• 2.5 OD 1.5 ID 1.5 Long Discount Steel

Sourcing

• 5x20 - $400 - [3]
• 5x16 - $366 - [4] -

• Bore 5"
• Stroke 16"
• Rod 2.5"
• Retracted 27" - if we trim it down, cut off 1.5" - and have 1.5" sticking out as is - we need to add 2" to get 3.5" sticking out. But reduce the length by 8" for 8" stroke. We need to trim the cylinder down by 8" - so contracted length to tip of rod is 19". Extended is 27. If we consider extended with 2" of plate - then the distance from bottom of drawer to the pin mount center is 29"
• Extended 43"