3/20/2024 0 Comments Iso 286 tolerance fit chart pdfMounting by sliding on without use of any great force, after lubrication the parts can be turned and Small clearances for precise guiding and centering of parts. Parts, distance rings, parts of machines fixed to shafts using pins, bolts, rivets or welds. The parts can easily be slid one into the other and turn. Sliding gears and clutch disks, crankshaft journals, pistons of hydraulic machines, rods sliding in bearings, grinding machine spindles. Without any noticeable clearance after assembly. Small clearances for accurate guiding of shafts. General fits of shafts, regulator bearings, machine tool spindles, sliding rods. Smaller clearances with general requirements for fit accuracy. in agricultural machines, bearings of pumps, fans and piston machines. Greater clearances without any special requirements for fit accuracy.Į.g. Of production and piston machines, parts rotating very rarely or only swinging. Greater clearances without any special requirements for accuracy of guiding shafts. Parts exposed to corrosive effects, contamination with dust and thermal or mechanical deformations. Medium drive fit for ordinary steel parts or shrink fits on light sections, the tightest fit usable with cast iron.įorce fit suitable for parts which can be highly stressed or for shrink fits where the heavy pressing forces required are impractical. Locational interference fit for parts requiring rigidity and alignment with prime accuracy of location but without special bore pressure Locational transition fit for more accurate location where greater interference is permissible. Locational transition fit for accurate location, a compromise between clearance and interference. Locational clearance fit provides snug fit for locating stationary parts but can be freely assembled and disassembled. Sliding fit not intended to run freely, but to move and turn freely and locate accurately. Loose running fit for wide commercial tolerances or allowances on external members.įree running fit not for use where accuracy is essential, but good for large temperature variations, high running speeds, or heavy journalĬlose running fit for running on accurate machines and for accurate location at moderate speeds and journal pressures.
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