Gage Quotation
Douglas Gage Quotations
We make it simple to get a quote by filling the form below. We have also provided you with some important nomenclature terms and charts to help you send accurate data that we need in order to give you an accurate quote.
Standard Air Spindle Nomenclature
| .3760-.3759 | I | OJ | TH | ST | EZ |
|---|---|---|---|---|---|
| Min. & Max. Part Print Checking Sizes | I = Inch | OJ = Open Jet | TH = Thru Hole | ST = Steel | CE - Chamfer End |
| M = Metric | BJ = Ball Jet | BH = Blind Hole | CH = Chrome | EZ = Easy Enter | |
| LJ = Leaf Jet | AC = Armor Clad | ||||
| CB = Ferrotic Carbide |
Note: Please include part print for quote.
Open Jet:
Open Jets are used when non part contact is required and when surface finish is 65 rms or finer. Open jets are the least expensive and least maintenance type of jet.
Ball Jet:
Ball Jets are recommended when the part is porous, when surface finish is above 65 rms, when a narrow land must be gaged, and when gaging close to a holes’ edge.
Leaf Jet:
Leaf Jet spindles are semi-standard contact gaging elements for checking rough surfaces, and for gaging thru or blind holes in which oil grooves, keyways or cross-drilled holes prevent the use of standard Open Air Spindles. Leaf
components are kept in stock and spindles are made to the size you order. Leaf Jet spindles are for checking hole diameters 7/16” and larger. They may be designed for checking tolerances in excess of those possible with Open Air/Ball Jet Spindles. They can be be used for checking to the extreme bottom of blind holes and to the extreme edge of holes and grooves. The two or more Leafs are hinged on a thin flexing section of steel: friction-free movement prevents sticking.
Checking Sizes
| Size Hole | Max Tolerance | Styles | Open Hole* | Blind Hole* |
|---|---|---|---|---|
| .050-.250 | .0010 | Open Jet | 1/4" | .080 |
| .251-.437 | .0025 | Open/Ball Jet | 5/8" | .080 |
| .438-.750 | .0025 | Open/Ball/Leaf Jet | 3/4" | .080 |
| .751-Up | .006 | Open/Ball/Leaf Jet | 3/4" | .110 |
Note: * Means centerline of jet to spindle end
Note: Please attach image file in PDF or Auto Cad of part print for quoting purposes.
