What is the function of plug gauge?
Plug gauges, in some cases called pin gauges, are metrology tools whose purpose is to gage the inside diameters of holes that have been drilled or machined into a manufactured part, component, or assembly.
What is a set plug gauge?
Adjustable Thread Ring Gages & Setting Plugs Thread Setting Plug Gages are used to inspect, calibrate and set adjustable thread ring gages. Vermont Gage inventories a broad range of Adjustable Thread Ring Gages used to inspect both the Unified Inch and M Series Metric product threads.
What is limit gauge and its purpose?
Definition of limit gage : a gage that serves to determine whether the measured part is within prescribed limits of tolerance.
What is a plug and ring gauge?
A go ring gauge’s dimensions are based on the maximum OD tolerance of the round bar or part being gauged. A go plug gauge’s dimensions are based on the minimum ID tolerance of the hole or part being gauged. The go plug (ID) gauge should be specified to a plus gaugemakers’ tolerance from the minimum part tolerance.
How do you calibrate pin gauges?
Ring, Pin, Plug, Disc Measurement – Calibration
- Use a soak plate.
- Keep gages and masters close together.
- Allow enough “soak time” for gages to acclimate (2-24 hours, depending on gage size)
- Measure gages quickly.
- Sandwich readings (master, gage1, gage2 . . . ,
- Use gloves or tongs to handle gages.
What are the types of gauges?
Snap Gauges : These are used for checking shafts. Thread Gauges : These are used for pitch diameter of the thread. Form Gauges : These are used to check the contour of a profile. Feeler Gauges : For checking the clearance between the mating surfaces.
How do you use a NPT plug gauge?
To gage Internal N.P.T. taper pipe threads, screw the N.P.T. thread plug firmly into the product – do not force. The thread is within the permissible tolerance when the gaging notch of the plug is not more than one turn plus or minus from being flush with the end of the product.
Do pin gauges need to be calibrated?
Pin, plug and ring gauges should be calibrated once per year unless they are used excessively in which case the interval should be increased accordingly to ensure their accuracy.
What size are my gauges?
“Here [in the U.S.] it’s measured by gauge.” Gauge sizes work in reverse, meaning that the higher the number, the thinner the width. So higher numbers (like 16 gauge) are thinner than smaller numbers (like a 6 gauge). When discussing gauges, references to a “larger gauge” means bigger around, not a bigger number.
What is a plain plug gauge?
Plain plug gauges featuring a go and no-go gauge. Plug gauges, in some cases called pin gauges, are metrology tools whose purpose is to gage the inside diameters of holes that have been drilled or machined into a manufactured part, component, or assembly.
What is a single-ended plug gauge?
Go plug gauges and no-go plug gauges are called single-ended gauges and consist of a handle into which a precisely machined pin or shaft has been inserted (sometimes called a member) and which is used to verify an aspect of the dimensional tolerances of the hole.
What is a go/no-go plug gauge?
In a combination go/no-go plug gauge (also called a double-ended plug gauge), the gauge handle has a go plug gauge extending outwards from one side of the handle and a no-go plug gauge extending outwards from the opposite side. This simplifies the use of the tool and allows for increased speed in the inspection process.
Will the go plug gauge fit in the hole?
For an acceptance condition, the go plug gauge should fit in the hole. If the go plug gauge will not fit into the hole in the workpiece, then that is an indication that the hole’s diameter is too small (an insufficient amount of material has been removed from the workpiece) and the part needs to be rejected.