M
Magnus_CA
My company supplies non-rigid plastic tubing that comes in an array of inside diameters (ID). Sizes range from 1/32" to 5".
ID is ALWAYS stated as a minimum value so we've historically used pin gauges with a go/no-go approach but I've grown tired of buying new pin gauges every time we add a new size to our catalog of parts. I recently came across ASTM D876 that refers to the use of taper gauges to determine the ID of PVC tubing. Specifically it states:
"Tapered-Steel Gages—Use chromium-plated gages suitable for covering the range of tubing sizes shown in Table 1. The gages shall have a uniform taper of 0.010 in./1 in. (0.010 mm/mm) of length, and shall be graduated with circular lathe-cut rings every 0.5 in. (13 mm) of length. The graduations
shall then represent a uniform increase in diameter of 0.005 in./0.5 in. (0.010 mm/mm) of length."
We typically test tubing with an ID between 1/32" to 2". It'd be great if I could find a single gage to cover that range. I'd gladly accept having to buy another gage or two to cover sizes over 2".
I found a flat taper gage from Starrett (google search 'Starrett 270 Taper Gauge') but the part about 'graduated with circular lathe-cut rings' leads me to believe they're referring to a cone-shaped gauge rather than a flat one. Unfortunately I've had no luck locating a round equivalent.
Does anyone know where I may be able to find such a gage?
Thanks in advance for the replies!
PS - So glad to see the forum back!
ID is ALWAYS stated as a minimum value so we've historically used pin gauges with a go/no-go approach but I've grown tired of buying new pin gauges every time we add a new size to our catalog of parts. I recently came across ASTM D876 that refers to the use of taper gauges to determine the ID of PVC tubing. Specifically it states:
"Tapered-Steel Gages—Use chromium-plated gages suitable for covering the range of tubing sizes shown in Table 1. The gages shall have a uniform taper of 0.010 in./1 in. (0.010 mm/mm) of length, and shall be graduated with circular lathe-cut rings every 0.5 in. (13 mm) of length. The graduations
shall then represent a uniform increase in diameter of 0.005 in./0.5 in. (0.010 mm/mm) of length."
We typically test tubing with an ID between 1/32" to 2". It'd be great if I could find a single gage to cover that range. I'd gladly accept having to buy another gage or two to cover sizes over 2".
I found a flat taper gage from Starrett (google search 'Starrett 270 Taper Gauge') but the part about 'graduated with circular lathe-cut rings' leads me to believe they're referring to a cone-shaped gauge rather than a flat one. Unfortunately I've had no luck locating a round equivalent.
Does anyone know where I may be able to find such a gage?
Thanks in advance for the replies!
PS - So glad to see the forum back!