Cartridge and block spindles - Gilman USA

SizinginstructionsProper spindle sizing is important to ensure a long and dependablelife. To help select the correct spindle, the followingfactors should be considered.General rules for sizing1 Always select the largest spindle that will fit your particularspace and comply with the speed requirements.This will give you the maximum spindle stiffness andlongest life.2 Keep tool overhang to a minimum, particularly whenboring, end milling or nonsupported arbor milling. Asyou move farther from the spindle bearings, bearingloads increase and spindle stiffness decreases. Usethe specification charts to find the maximum overhangdistance.3 When boring, the spindle nose bearing I.D. should beas large or larger than the hole being machined.4 To minimize any shaft or bearing loading, keep withinthe maximum torque rating given on the specificationcharts.5 Consider the environment in which the spindle is used.If the conditions are dusty, air purging is recommended.If there is heavy coolant or chips, it is advisable tosupply a deflector cover to keep coolant or chips fromdirectly attacking the spindle. Contact seals should beused unless speed requirements do not allow.6 Specify the correct bearing arrangement. For mostly radialloaded applications, use a bearing pair at the nose end. Forhigh axial loads, combination axial and radial loading orheavy or interrupted cuts, use a triplex bearing set at thenose end.7 Gilman USA’s engineering and sales staff is always availableto help select the correct spindles for your applications. Whenasking for assistance, please supply the following information:a) Type of operation and stock removal amountsb) Tooling descriptionc) Part material specificationd) Spindle orientatione) Environmental conditionsf) Space limitationsg) Horsepower and RPM requiredWhenever possible, supply a part print along with any other informationthat may be useful in spindle selection.©2011 Gilman USA, LLC5