Engineering Calculators · Lathe Chucks and Workholding
KORRETTO lathe chuck and fixture calculators provide online engineering tools for hydraulic chucks, rotary cylinders, soft jaws, expanding mandrels, thin-wall workpieces and machining unit conversion. The available tools support preliminary workholding selection, clamping-force checks, jaw sizing, high-speed chucking risk review, internal expansion estimates, thin-wall deformation discussion, shop-floor unit conversion and taper force-amplification review.
Hydraulic Chucks and Rotary Cylinders
Estimate theoretical hydraulic cylinder pull force, effective drawbar force and approximate hydraulic chuck clamping force from chuck technical data, piston area and hydraulic pressure.
Use cases: Hydraulic chuck selection, rotary cylinder matching, pressure reference and replacement review.
Open calculatorPreliminary Chuck and Fixture Selection
Suggest specific chuck or fixture series based on workpiece shape, clamping datum, actuation method, clamping type, machine type, accuracy and surface protection needs.
Use cases: New-job workholding comparison, fixture replacement screening and quotation data preparation.
Open selection assistantSoft Jaw Sizing and Contact Range
Estimate soft jaw bore diameter, contact arc length, grip length ratio and clamping risk from workpiece diameter, jaw count, grip length and machining allowance. Generate a soft jaw sizing sketch for preliminary design reference.
Use cases: Jaw boring size checks, OD / ID gripping comparison and quotation data preparation.
Open soft jaw calculatorHigh-Speed Chucking and Centrifugal Force
Estimate jaw centrifugal force, clamping force drop and high-speed chucking risk from chuck model, jaw mass, center-of-gravity radius and spindle speed.
Use cases: Tall soft jaws, heavy top jaws, high-speed finishing and speed-setting risk review.
Open speed calculatorInternal Expansion and Taper Force
Estimate radial expansion force, contact pressure and thin-wall deformation risk from hydraulic pressure, drawbar force, taper angle, friction coefficient and contact length.
Use cases: Expanding mandrel scheme review, bore locating, sleeve-part deformation risk discussion.
Open mandrel calculatorThin-Wall Deformation and Roundness Risk
Estimate radial elastic deformation, contact pressure and indentation risk for thin-wall sleeves, tubes and rings from material grade, wall thickness, diameter, clamping length, force and contact area.
Use cases: Thin-wall clamping comparison, roundness-risk discussion, rubber-flex collet / diaphragm chuck / expanding mandrel selection reference.
Open deformation estimatorMachining Units and Hardness Reference
Convert metric-inch values, pressure, force, torque, RPM, surface speed, feed rate, surface roughness and HRC/HB/HV hardness references used in machining.
Use cases: Shop-floor communication, drawing unit checks, hydraulic pressure conversion, surface-speed estimates and hardness reference conversion.
Open unit converterTaper Mechanisms and Force Amplification
Convert included angle, half angle, 1:N taper ratio and taper dimensions, and estimate taper force amplification and reference radial force.
Use cases: Expanding mandrels, collets, tapered sleeves, pull-back mechanisms and preliminary fixture discussion.
Open taper calculatorNo. The calculators are intended for preliminary engineering judgment only. Final selection should be checked against technical limits, machine interface data, workpiece drawings, cutting load and trial clamping results.
It is used for preliminary hydraulic chuck selection, rotary cylinder matching, pressure reference and replacement review before changing an existing chuck or hydraulic cylinder.
Yes. Use custom piston area or custom piston diameter mode and enter the actual cylinder data. Stroke, mounting interface, maximum pressure and chuck allowable drawbar force still need to be verified.
Real clamping behavior is affected by speed, soft jaw mass, clamping diameter, jaw height, lubrication, wear, drawbar assembly and workpiece friction, so technical data checks and trial clamping remain necessary.
Please provide machine model, spindle nose, drawbar or cylinder data, target chuck size, workpiece drawing, clamping diameter, machining process, target speed and planned hydraulic pressure range.