Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled. Tolerance classes for shafts. Sliding fit not intended to run freely, but to move and turn freely and locate accurately. The calculator which calculates press fit force, required temperatures for shrink fit, fit stresses and iso tolerances for holes iso parameters necessary for interference fit design.
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Pivots, latches, fits of parts exposed to corrosive effects, contamination with dust and thermal or mechanical deformations. Multiple fits of shafts of production and piston machines, parts rotating very rarely or only swinging. Fits of long shafts, e. Main fits of machine tools. General fits of shafts, regulator bearings, machine tool spindles, sliding rods. Without any noticeable clearance after assembly. Parts of machine tools, sliding gears and clutch disks, crankshaft journals, pistons of hydraulic machines, rods sliding in bearings, grinding machine spindles.
The parts can easily be slid one into the other and turn. Easily demountable parts, distance rings, parts of machines fixed to shafts using pins, bolts, rivets or welds. Mounting by sliding on without use of any great force, after lubrication the parts can be turned and slid by hand. Precise guiding of machines and preparations, exchangeable wheels, roller guides.
The parts can be assembled or disassembled manually. Easily dismountable fits of hubs of gears, pulleys and bushings, retaining rings, frequently removed bearing bushings. The parts can be assembled or disassembled without great force using a rubber mallet.
Demountable fits of hubs of gears and pulleys, manual wheels, clutches, brake disks. Mounting of fits using pressing and light force. Fixed plugs, driven bushings, armatures of electric motors on shafts, gear rims, flushed bolts.
Assembly of the parts can be carried out using cold pressing. Hubs of clutch disks, bearing bushings. Assembly of parts using hot pressing. Assembly using cold pressing only with use of large forces. Permanent coupling of gears with shafts, bearing bushings. Assembly using pressing and great forces under different temperatures of the parts.
ISO Tolerances for Holes (ISO 286-2): Tool & Die Making | | | |
Locational clearance fit provides snug fit for locating stationary parts; but can be freely assembled and disassembled. A process toleranfes index is used to indicate the relationship between tolerances and actual measured production. Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure requirements. Manufacturing Accuracy Increasing Problems, optimization, Vol. The tolerances defined in ISO are applicable to size range from 0 mm to mm but there are a lot of exceptional cases defined in the standard which depend on tolerance selection. Devices that can be used for the measurement of the inside diameter of the hole and outside diameter of a shaft.
iso tolerances for shafts (iso 286-2)
ISO 286-2:2010/Cor 1:2013
UNE-EN ISO 286-2:2011