Manual Size Fly Presses

Jeweler's Size 0 Flypress - Image (c) 2003 Jeweler's Size 0 Flypress
Approximately 20" (610mm)
Hopkins Machine Corporation Flypress - Image (c) 2003 Hopkins Machine Corporation, Chicago IL
Aprox. 60" (~1500mm), 90" (~2300) on raised base.
Size approximately 10-12

Manual Flypress Sizes

These range from little jeweler's bench presses in size 0 and 1 such as the one above to large A-frame or double frame two man presses like the old Hopkins above. Generally the open sided C-Frame fly presses are one man presses and the double or A-frame are two man presses.

One man presses start as little 75 pound (35 kg) half ton capacity presses and range up to 750 pound (340 kg) six ton capacity presses. The smallest are used for blanking, bending, pressing and riveting small parts, the larger sizes can also be used for forging and draw forming.

Two man presses can be run by one operator but it is an inconvenience. The handle distance and needed stroke are too great to do while standing in one position or holding work in the press. These presses are heavy enough that to get the best advantage of them the wheel is operated two handed. For many jobs this requires one person handling the work and another operating the press.
TYPE One Man Two Man
Size 0 1 2 3 4 5 6 8 10 12
Frame Height 18-20" 19-21" 20-24" 24-26" 26-28" 28-32" 32-35" 35-38" 38-44" 45-50"
Work Height 4.5" 5" 5.75" 6.75" 7.25" 8" 9" 10" 11"  12"
Screw Diameter    1.46"  
1.125"
   1.50"  
1.750"
   1.69"  
1.875"
   1.83"  
2.000"
   1.89"  
2.125"
   2.00"  
2.250"
   2.37"  
2.500"
   2.44"  
2.750"
3.00"    3.47"  
3.750"
Screw Leads 4 Start 3 Start
Max Weight HD 100# 250# 300# 400# 450# 500# 750# 1000# 1500# 2000#
Flywheel Mass 11 lbs. 22 lbs. 44 lbs. 66 lbs. 85 lbs. 110 lbs. 135 lbs. 178 lbs. 222 lbs. 264 lbs.
Application Single operator
Cold bench work
One or two operator
Hot and cold
bench and floor work
Two operator
Hot and cold
floor (standing) work
Capacity:   The approximate rating of these presses is in tons by the number size for work performed in .012 to .015" (0.3 to 0.4 mm) travel. As the work distance increases the applied force decreases.   Copyright © 2003 - 2008
The values above do not apply to any one brand of flypress. They are averages and engineered values. For specifics see the manufacturer's data.
  Press Math:
  • Punching Steel  anvilfire.com chart and force calculator for punching round holes.

  • Riveting Force  anvilfire.com chart with force to head steel rivets.


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