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  • Users: bduff
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  1. bduff

    Rivets - ASTM A502 - Grade 1, 2, or 3 Suppliers

    Can anyone recommend a company that can supply Countersunk Rivets that meet ASTM A502 - Grade 1, 2, or 3? Thanks in Advance!!
  2. bduff

    Cold Forming Countersunk Holes

    I am investigating a manufacturing process in our shop where we are cold forming (pressing) the countersink detail into the plate rather than machining it. The countersink is for a 3/4" bolt and a 3/4" plate. Problem is the plate is splitting to the end of the plate which is 1.625" from the...
  3. bduff

    Closed Cell Foam Expansion Device

    I have a hydraulic device that operates at very low pressures. To date, it has been completely filled with oil and is then sealed (no hoses, lines, etc are present). Ambient temperature conditions are causing the oil to expand which increases the internal pressure and has caused the device to...
  4. bduff

    Pressure Change Due to Varying Temperature of a Closed Cell Oil Tank with No Expansion Chamber

    I am trying to calculate the pressure change due to temperature fluctuations of an incompressible fluid (Transmission Fluid) inside a closed reservoir tank. According to an equation I have found, h2 - h1 = c(T2-T1) + v(P2-P1), provides property changes of incompressible fluids where: h =...
  5. bduff

    Solid 1" Rivet Installation

    I am in need of some assistance on where to find a rivet tool, press, or hammer that is capable of finishing 1" solid steel countersunk head rivets. The tail will also be countersunk as I have no clearance for any protruding material on either side. These are 1" rivets with a finish length of...
  6. bduff

    Cutting Fiberglass Cloth

    I am inquiring into if any of you have ever cut holes into a piece of fiberglass cloth. I need an efficient way of doing so in a production environment prior to bonding the cloth with epoxy. I have inquired to our local Laser Cutting Shop to see if they can do so but I'm not confident this...
  7. bduff

    Solidworks Simulation Pros & Cons

    I am pushing to have a few seats of Solidworks Simulation Professional purchased for my engineering group. I would like to hear your experience with the software. What problems have you run into? Would you reccomend it to a new user? I have used Solidworks for years so the user interface...
  8. bduff

    Gear Pumps & Fluid Viscosities

    Ok guys / gals, I am currently having problems with Hyd. Fluid Viscosities effecting gear pump performance. Background of System: Pump Charging Accumlator to 3000 psi with Pressure Switch in line to turn pump off. Accumlator Discharge every 36 seconds. Repeat Process. Background of...
  9. bduff

    Hydraulic Piston Velocity through a Known Fluid

    Any Help you could provide with the following question would be greatly appreciated. Problem: I am trying to determine the velocity of a piston through a hydraulic cylinder. (Rod goes through the piston with a gap of known area to allow allow the fluid to flow from one side of the cylinder to...

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