News
- News
Tapered roller bearings Designation system
Prefixes:
E2. SKF Energy Efficient bearing
J Metric bearing following the ABMA designation system (ANSI/ABMA
Standard 19.2)
T Metric bearing in accordance with ISO 355
Internal design:
B Steep contact angle
Group 2: External design (seals, snap ring groove etc.)
R Flanged outer ring
T A number immediately following the T identifies the total width of matched bearings, arranged
back-to-back or in tandem.
X Boundary dimensions changed to conform to ISO
Group 3: Cage design
J Stamped steel cage, roller centred. A number following the J indicates a different cage design.
TN9 Glass fibre reinforced PA66 cage, roller centred
TNH Glass fibre reinforced PEEK cage, roller centred
Group 4.1: Materials, heat treatment
HA1 Case-hardened inner and outer rings
HA3 Case-hardened inner ring
HN1 Inner and outer rings with special surface heat treatment
HN3 Inner ring with special surface heat treatment
Group 4.6: Other variants
CL7A Pinion bearing, superseded by CL7C
CL7C High-performance design
CLN Reduced tolerances for ring widths and total (abutment) width in accordance with
ISO tolerance class 6X
PEX SKF Explorer bearing on customer request
Q Optimized contact geometry and surface finish
V001 CL7C and /2
VA321 Optimized internal design
VA606 Crowned raceway on the outer ring, logarithmic profile on the inner ring and special
heat treatment
VA607 Same as VA606, but other outside diameter tolerance
VC027 Modified internal geometry for increased permissible misalignment
VC068 Increased running accuracy and special heat treatment
VQ051 Modified internal geometry for increased permissible misalignment
VQ267 Reduced inner ring width tolerance to ± 0,025 mm
VQ495 CL7C with reduced or shifted tolerance range for the outside diameter
VQ506 Reduced inner ring width tolerance
VQ507 CL7C with reduced or shifted tolerance range for the outside diameter
VQ523 CL7C with reduced inner ring width tolerance and reduced or shifted tolerance range
for the outside diameter
VQ601 Accuracy to ABMA tolerance class 0 for inch bearings
VB022 Chamfer dimension of large outer ring side face 0,3 mm
VB026 Chamfer dimension of large inner ring side face 3 mm
VB061 Chamfer dimension of large inner ring side face 8 mm
VB134 Chamfer dimension of large inner ring side face 1 mm
VB406 Chamfer dimension of large inner and outer ring side faces 3 mm
VB481 Chamfer dimension of large inner ring side face 8,5 mm
VE174 One locating slot in the large side face of the outer ring, improved running accuracy
Group 4.5: Lubrication
Group 4.4: Stabilization
Group 4.3: Bearing sets, matched bearings
DB Two bearings matched for mounting back-to-back. A number immediately following
the DB identifies the design of the spacer rings.
DF Two bearings matched for mounting face-to-face. A number immediately following
the DF identifies the design of the spacer ring.
DT Two bearings matched for mounting in tandem. A number immediately following the
DT identifies the design of the spacer rings.
Group 4.2: Accuracy, clearance, preload, quiet running
the professional team to service !