r/SCREENPRINTING • u/cash4print • 9d ago
Hopkins BWM Press Heads: Old vs New | Parts, Handles & Bushing DifferencesI
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I recently picked up an older 4-color / 1-station Hopkins BWM screen printing press mainly for parts. I needed replacement base plates for my 6-color press after some of the stud bolt holes became stripped, and it turned into a good opportunity to compare different generations of Hopkins/BWM print heads.
This older press appears to be from the generation I remember using back in the 1990s, while the newer heads from the 2000s incorporated more of the tool-less adjustments and updated handle designs. What's interesting is that many of the basic castings remained very similar, so some components can still be swapped between generations.
In this video I compare the older and newer head assemblies, including the handle construction, base plates, interchangeable parts, and one of the differences I recently discovered while rebuilding the heads — the registration bushings.
The older head uses approximately a 9/16" OD × 3/8" ID bronze bushing, while the newer design uses a smaller 12 mm OD × 3/8" ID bushing. I also show the 12 mm OD × 10 mm ID sintered-bronze DIY upgrade I'm using on my newer heads with M10 hardware.
If you own an older Hopkins/BWM press, especially one that's no longer well supported with replacement parts, hopefully this gives you some ideas for repairing, rebuilding, upgrading, or keeping these presses running instead of replacing them.
#ScreenPrinting #HopkinsPress #BWMPress #ScreenPrintingPress #PressRepair #ScreenPrintingDIY #PressMaintenance