Gage Quotation
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.

Gage Quotation Form

Share by: