SKF - Rolling Bearings

Tolerances
Tolerance tables
The actual tolerances are listed in the tables
referenced in the following:
• Normal tolerances for radial bearings,
except tapered roller bearings († table 3,
page 137)
• P6 class tolerances for radial bearings,
except tapered roller bearings († table 4,
page 138)
• P5 class tolerances for radial bearings,
except tapered roller bearings († table 5,
page 139)
• Normal and CL7C class tolerances for metric
tapered roller bearings († table 6,
page 140)
• CLN class tolerances for metric tapered
roller bearings († table 7, page 141)
• P5 class tolerances for metric tapered roller
bearings († table 8, page 142)
• Tolerances for inch tapered roller bearings
(† table 9, page 143)
• Tolerances for thrust bearings († table 10,
page 144)
• Normal, P6 and P5 class tolerances for
tapered bore, taper 1:12 († table 11,
page 145)
• Normal tolerances for tapered bore, taper
1:30 († table 12, page 146)
Where standardized, the values are in accordance
with ISO 492, ISO 199 and
ANSI/ABMA Std 19.2.
The limits for metric bearings are in accordance
with ISO 582. The limits for inch tapered
roller bearings, which differ considerably from
those for metric bearings, are described in
ANSI/ABMA 19.2, but are not standardized.
Example
What is the largest radial value (r 1 max ) for the
chamfer of a 6211 deep groove ball bearing?
From the product table († page 328),
r 1 min = 1,5 mm and d = 55 mm.
From table 13 († page 147) with
r s min = 1,5 mm and d < 120 mm, the largest
radial value r 1 max = 2,3 mm.
E
Chamfer dimension limits
To prevent the improper dimensioning of fillets
on associated components for rolling bearings
and facilitate calculations to locate retaining
rings, the maximum chamfer limits († fig. 2)
for the relevant minimum chamfer dimensions
(† product tables) are listed in the following
tables:
Fig. 2
• chamfer dimension limits for metric radial
and thrust bearings, except tapered roller
bearings († table 13, page 147)
• chamfer dimension limits for metric radial
tapered roller bearings († table 14,
page 147)
• chamfer dimension limits for inch tapered
roller bearings († table 15, page 148)
r 2 max
r 4 max
r 2 min
r 4 min
r 1 min
r 3 min
r 1 max
r 3 max
133