Building a Pneumatic Press : a DIY Replacement for a Toggle Press

After using a manual toggle press to press fit thousands of bearings, I decided it was time to switch to something a little more automated. I put together a pneumatic press with a few aluminum plates, a cylinder, valve, and some hardware and it's working great so far.

The original Schmidt toggle press was a model 17R.

Here are the parts used in the build:

McMaster Carr Part Numbers and Descriptions:
91423A220 Fine-Thread Medium-Strength Steel Hex Nut Class 8, M18 x 1.50 mm Thread
98861A100 Low-Strength Steel Threaded Rod M12 x 1.75 mm Thread Size, 1 M Long
98861A120 Low-Strength Steel Threaded Rod M16 x 2 mm Thread Size, 1 M Long
90591A220 Zinc-Plated Steel Hex Nut Medium-Strength, Class 8, M16 x 2 mm Thread
91166A310 Zinc-Plated Steel Washer for M16 Screw Size, 17 mm ID, 30 mm OD

Spring Return Hand Valve from HQC-Tools.com
5/2 Way Hand Pull Valve with Spring Return, 1/4″ NPT 4H210-08S

Pneumatic Components from AutomationDirect.com
PU8MBLU100 NITRA pneumatic tubing, 8mm outside diameter
MS516-14N NITRA pneumatic push-to-connect fitting, male, 5/16in (8mm) tube to 1/4in NPT
SBC-18N Exhaust Silencers (I used some Festo Silencers I had on hand, not these)
UY8M NITRA pneumatic push-to-connect fitting, union Y 5/16(8mm)
FVR8M-38G Flow Controls (I used Festo again which are expensive). If you use the meter-out version you only need one of these on the lower port and can use 3/8 BSPP/G quick connect fittings for the upper two ports).

Two Stage 100mm bore Cylinder from Aliexpress ( https://www.aliexpress.com/item/4000037212696.html?spm=a2g0s.9042311.0.0.5d344c4dFvXfKs )
Model should be SDAT 100x25x0 for $112+.

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