What do CA and P5 mean in bearing 22232CA/P5?
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As the title suggests, in 22232CC/C3, C3 refers to the bearing clearance; what does CC mean?
P5 indicates the precision grade of the bearing, and it should be a relatively high grade
Reply to 1# Naoniu loves surfing the internet: Bearing tolerance symbols and definitions, NSK suffix codes (1) Internal structure – Bearings with an internal design that differs from the standard. A — Angular contact ball bearing with a contact angle of 30 degrees. A5 — Angular contact ball bearing with a contact angle of 25 degrees. B — Angular contact ball bearing with a contact angle of 40 degrees. C — Angular contact ball bearing with a contact angle of 15 degrees. C — Tapered roller bearing with a contact angle of 20 degrees. D — Tapered roller bearing with a contact angle of 28 degrees. C, CA (with brass solid cage), CD (with stamped cage) – high-load self-aligning roller bearings. E — High-load cylindrical roller bearings. H — High-load thrust self-aligning roller bearing. J — The minor diameter, angle, and outer ring width of the raceway in tapered roller bearings are in accordance with ISO specifications. (2) Material g – ring, with rolling elements made of carburized steel. H — Ring type, with rolling elements made of stainless steel. (3) Retainer M – Solid copper alloy retainer. T — Synthetic resin retainer. W — Stamping retainer. V — No cage. (4) Seal ring, dust cover Z, ZS — dust cover with a steel plate on one side. ZZ, ZZS — dust covers with steel plates on both sides. D, DU — with a contact rubber seal ring on one side. DD, DDU — with contact rubber seals on both sides. V —— With a non-contact rubber seal ring. VV —— With non-contact rubber seals on both sides. (5) Ring shape K – conical hole, taper 1:12. K30 —— Tapered hole, taper 1:30. E — The ring has cuts or oil holes. E4 — Outer ring with oil grooves and oil holes. N — Outer ring outer diameter with stop groove. NR — Outer ring with a stop groove on the outer diameter, stop ring. (6) Coupling and gasket DB — installed in back-to-back pairs. DF — Face-to-face paired installation. DT — Installed in pairs in series. +K — Outer ring with padding. +L — Inner ring with padding. +KL — Inner and outer rings with linings. (7) Clearance C1 – radial clearance of a radial bearing, smaller than clearance C2. C2 —— Radial clearance of the radial bearing, smaller than the standard clearance. CN (omitted) — radial standard clearance for radial bearings. C3 — radial clearance of the radial bearing, larger than the standard clearance. C4 — radial clearance of the radial bearing, larger than that of C3. C5 — radial clearance of the radial bearing, which is larger than that of C4. CC1 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is smaller than that of CC2. CC2 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is smaller than the standard clearance. CC — Cylindrical roller bearing (non-interchangeable), radial standard clearance. CC3 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than the standard clearance. CC4 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than that of CC3. CC5 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than that of CC4. MC1 — Small, miniature ball bearings with radial clearance, having less clearance than MC2. MC2 — small, miniature ball bearings with radial clearance, having less clearance than MC3. MC3 — Small and miniature ball bearings, radial clearance: standard clearance. MC4 — Small, miniature ball bearings with radial clearance, larger clearance than MC3. MC5 — small and miniature ball bearings with radial clearance, larger than that of MC4. MC6 — Small, miniature ball bearings with radial clearance, larger clearance than MC5. CM — radial clearance for deep groove ball bearings and cylindrical roller bearings used in motors. CT — Radial play of cylindrical roller bearings for motors. (8) Tolerance grade P0 (omitted) – The tolerance grade corresponds to Grade 0 as specified in the JIS standard. P6 — The tolerance grade corresponds to level 6 as specified in the JIS standard. P6X — The tolerance grade meets the 6X level specified by the JIS standard. P5 — The tolerance grade corresponds to level 5 as specified in the JIS standard. P4 — The tolerance grade corresponds to level 4 as specified in the JIS standard. P2 — The tolerance grade corresponds to level 2 as specified in the JIS standard. (9) Special specification X26 —— The operating temperature is limited to below 150 degrees Celsius. X28 — The operating temperature is limited to below 200 degrees Celsius. X29 – The operating temperature is limited to below 250 degrees Celsius. S11 —— Self-aligning roller bearing, with a maximum operating temperature of below 200 degrees Celsius.
Meaning of the suffixes for SKF deep groove ball bearings: First, common suffixes for SKF single-row deep groove ball bearings: CN: normal group radial clearance； These letters are generally used in combination with the following to indicate narrower or shifted clearance ranges: H: A narrowed clearance range, corresponding to the upper half of the original clearance range; L: A narrowed clearance range, corresponding to the lower half of the original clearance range; P: A shifted clearance range, corresponding to the combination of the upper half of the original clearance range and the lower half of the next clearance range. These letters can also be combined with the following clearance categories to convey corresponding meanings: C2, C3, C4, and C5. For example, C2: Radial clearance is less than that of the standard category; C3: Radial clearance is greater than that of the standard category; C4: Radial clearance is greater than that of C3; C5: Radial clearance is greater than that of C4. DB: Two single-row deep groove ball bearings paired back to back; DF: Two single-row deep groove ball bearings paired face to face; DT: Two single-row deep groove ball bearings paired in series; E: Reinforced design. GJN: Polyurea-based lubricant, NLGI consistency grade 2, operating temperature range from -30 to +150 degrees (standard fill amount); GXN: Polyurea-based lubricant, NLGI consistency grade 2, operating temperature range from -40 to +150 degrees (standard fill amount). J: Stamped steel retainer. LHT23: Lithium-based lubricant, NLGI consistency grade 2, operating temperature range from -50 to +140 degrees (standard fill amount); LT: Lithium-based lubricant, NLGI consistency grade 2, operating temperature range from -55 to +110 degrees (standard fill amount); LT10: Lithium-based lubricant, NLGI consistency grade 2, operating temperature range from -50 to +90 degrees (standard fill amount). M: Machined brass retainer, with steel balls for guidance. Different designs and materials are identified by numbers after M, such as M2, MA: Machined brass cage, outer ring guidance; MB: Machined brass cage, inner ring guidance; MT33: Lithium-based grease, NLGI consistency 3, temperature range from -30 to +120 degrees (standard fill amount); MT47: Lithium-based grease, NLGI consistency 2, temperature range from -30 to +110 degrees (standard fill amount); N: Outer ring with stop groove; NR: Outer ring with stop groove and stop ring; N1: Groove on the side of the outer ring (used in conjunction with a stop device to prevent rotation of the outer ring); P5: Dimensional accuracy and rotational accuracy meet ISO tolerance class 5; P6: Dimensional accuracy and rotational accuracy meet ISO tolerance class 6; P52: P5 + C2; P62: P6 + C2; P63: P6 + C3; RS1: Nitrile butadiene rubber (NBR) contact seal with a steel reinforcement on one side; RSH: Nitrile butadiene rubber (NBR) contact seal with a steel reinforcement on one side; RSL: Nitrile butadiene rubber (NBR) low-friction seal with a steel reinforcement on one side; RZ: Nitrile butadiene rubber (NBR) low-friction seal with a steel reinforcement on one side; TH: Fiber-reinforced phenolic resin cage (snap-type); TN: Injection-molded nylon cage; TN9: Injection-molded glass fiber-reinforced nylon 6,6 cage; VL0241: Outer ring surface coated with alumina, providing insulation up to 1000VDC; VL2071: Inner ring surface coated with alumina, providing insulation up to 1000VDC; WT: Polyurea-based grease, NLGI consistency 2, temperature range from -40 to +160 degrees (standard fill amount); Y: Stamped copper cage; Z: One side equipped with a stamped steel dust cover; ZNR: Outer ring with stop groove and stop ring, plus a stamped steel dust cover on the other side of the stop groove; 2RS1: Nitrile rubber (NBR) contact seals with steel reinforcements on both sides; 2RSH: Nitrile rubber (NBR) contact seals with steel reinforcements on both sides; 2RSL: Nitrile rubber (NBR) low-friction seals with steel reinforcements on both sides; 2RZ: Nitrile rubber (NBR) low-friction seals with steel reinforcements on both sides; 2Z: Both sides equipped with stamped steel dust covers; 2ZNR: Outer ring with stop groove and stop ring, plus stamped steel dust covers on both sides
Second, the common suffixes for SKF single-row deep groove ball bearings with notched races are as follows: C3: Radial clearance greater than that of the standard series; N: Outer ring with a stop groove; NR: Outer ring with a stop groove and a stop ring; Z: One side equipped with a stamped steel dust cover; ZNR: Outer ring with a stop groove and a stop ring, plus a stamped steel dust cover on the other side of the stop groove; 2Z: Stamped steel dust covers on both sides; 2ZNR: Outer ring with a stop groove and a stop ring, plus stamped steel dust covers on both sides. Third, the meanings of the suffixes for SKF stainless steel deep groove ball bearings are as follows: R: Outer ring with a flange; VT378: Non-toxic lubricant (for occasional contact with food ingredients); 2RS1: Nitrile rubber (NBR) contact seals with steel frames on both sides; 2Z: Stamped steel dust covers on both sides; 2ZR: Stamped steel dust covers on both sides plus a flange on the outer ring. The meanings of the suffixes used for SKF single-row angular contact ball bearings are as follows: A: Contact angle of 30 degrees; AC: Contact angle of 25 degrees; B: Contact angle of 40 degrees; CA: General-purpose bearings, with axial clearance smaller than that of the standard series (CB) when arranged back to back or face to face; CB: General-purpose bearings, with axial clearance equal to that of the standard series when arranged back to back or face to face; CC: General-purpose bearings, with axial clearance greater than that of the standard series (CB) when arranged back to back or face to face; DB: Two bearings paired back to back; DF: Two bearings paired face to face; DT: Two bearings paired in series; E: Optimized internal design; F: Machined steel cage; GA: General-purpose bearings, with light preloading when arranged back to back or face to face; GB: General-purpose bearings, with medium preloading when arranged back to back or face to face; GC: General-purpose bearings, with heavy preloading when arranged back to back or face to face; J: Stamped steel cage, with steel balls for guidance; M: Machined brass cage, with steel balls for guidance; different designs are identified by numbers after M, such as M1; N1: Outer ring with one positioning groove; N2: Outer ring with two positioning grooves, 180 degrees apart; P: Injection-molded glass fiber-reinforced nylon 6,6 cage, with steel balls for guidance; P5: Dimensional accuracy and rotational precision meeting ISO tolerance class 5; P6: Dimensional accuracy and rotational precision meeting ISO tolerance class 6; W64: Bearings filled with solid oil; Y: Window-type stamped brass cage, with steel balls for guidance. 2. The meanings of the suffixes used for SKF double-row angular contact ball bearings are as follows: A: No ball seating notch; CB: Specific axial clearance; C2: Axial clearance less than that of the standard grade; C3: Axial clearance greater than that of the standard grade; D: Split inner ring; HT51: High-temperature grease, suitable for temperatures ranging from -30 to +175 degrees; J1: Stamped steel retainer, with steel balls for guidance; M: Machined brass retainer, with steel balls for guidance; MA: Machined brass retainer, with the outer ring providing guidance; MT33: Lithium-based grease, suitable for temperatures ranging from -30 to +120 degrees; N: Outer ring with a stop groove; NR: Outer ring with both a stop groove and a stop ring; P5: Dimensional accuracy and rotational precision meet ISO tolerance class 5; P6: Dimensional accuracy and rotational precision meet ISO tolerance class 6; P62: P6 + C2; P63: P6 + C3; TN9: Card-type glass fiber reinforced nylon 6,6 retainer, with steel balls for guidance; 2RS1: Nitrile rubber seals with steel frames on both sides; 2Z: Stamped steel dust covers on both sides.
3. The meanings of the suffixes used for SKF four-point contact ball bearings are as follows: B20: Narrower width tolerance; C2: Axial clearance less than that of the standard grade; C2H: Axial clearance within the upper half of the C2 group’s clearance range; C2L: Axial clearance within the lower half of the C2 group’s clearance range; C3: Axial clearance greater than that of the standard grade; C4: Axial clearance greater than that of C3; CNL: Axial clearance within the lower half of the standard grade’s clearance range; FA: Machined steel retainer, with the outer ring providing guidance; MA: Machined brass retainer, with the outer ring providing guidance; N2: Outer ring with two positioning grooves 180 degrees apart; PHA: Injection-molded polyether ether ketone (PEEK) retainer, with the outer ring providing guidance; P6: Dimensional accuracy and rotational precision meet ISO tolerance class 6; P63: P6 + C3; P64: P6 + C4; S1: Special heat treatment, ensuring that the bearing rings remain dimensionally stable at temperatures below +200 degrees; 344524: C2H + CNL.
The meanings of the suffixes used for SKF cylindrical roller thrust bearings are as follows: HB1: Bainited shaft and raceway rings; M: Machined brass retainer; P5: Dimensional and rotational precision meet ISO tolerance class 5; TN: Injection-molded glass fiber reinforced nylon 6,6 retainer.
Additional code explanations for NSK bearings: The codes for NSK bearings consist of a basic code, a prefix code, and a suffix code. The basic code indicates the inner diameter size and contact angle within the bearing series (including type) ； The prefix code indicates a specific bearing ； A suffix code is a supplementary code added after the basic bearing code when there are changes in the bearing’s structural shape, dimensions, material, sealing, cage, tolerances, clearance, heat treatment, lubrication, or technical requirements. We have discussed NSK’s suffix codes before; today we will give a brief explanation of the prefix codes and basic codes for NSK bearings. Prefix codes: F: Deep groove ball bearings with flanged outer rings; HR: High-load tapered roller bearings; MF: Deep groove ball bearings of specific dimensions. Basic codes (contact angle codes): A: Angular contact ball bearings, with a contact angle of 30 degrees; A5: Angular contact ball bearings, with a contact angle of 25 degrees; B: Angular contact ball bearings, with a contact angle of 40 degrees; C: Angular contact ball bearings, with a contact angle of 15 degrees; C: Tapered roller bearings, with a contact angle of 20 degrees; D: Tapered roller bearings, with a contact angle of 28 degrees. NSK suffix codes: (1) Internal structure – Bearings whose internal design differs from the standard. A — Angular contact ball bearing with a contact angle of 30 degrees. A5 — Angular contact ball bearing with a contact angle of 25 degrees. B — Angular contact ball bearing with a contact angle of 40 degrees. C — Angular contact ball bearing with a contact angle of 15 degrees. C — Tapered roller bearing with a contact angle of 20 degrees. D — Tapered roller bearing with a contact angle of 28 degrees. C, CA (with brass solid cage), CD (with stamped cage) – high-load self-aligning roller bearings. E — High-load cylindrical roller bearings. H — High-load thrust self-aligning roller bearing. J — The minor diameter, angle, and outer ring width of the raceway in tapered roller bearings are in accordance with ISO specifications. (2) Material g – ring, with rolling elements made of carburized steel. H — Ring type, with rolling elements made of stainless steel. (3) Retainer M – Solid copper alloy retainer. T — Synthetic resin retainer. W — Stamping retainer. V — No cage. (4) Seal ring, dust cover Z, ZS — dust cover with a steel plate on one side. ZZ, ZZS — dust covers with steel plates on both sides. D, DU — with a contact rubber seal ring on one side. DD, DDU — with contact rubber seals on both sides. V —— With a non-contact rubber seal ring. VV —— With non-contact rubber seals on both sides. (5) Ring shape K – conical hole, taper 1:12. K30 —— Tapered hole, taper 1:30. E — The ring has cuts or oil holes. E4 — Outer ring with oil grooves and oil holes. N — Outer ring outer diameter with stop groove. NR — Outer ring with a stop groove on the outer diameter, stop ring. (6) Coupling and gasket DB — installed in back-to-back pairs. DF — Face-to-face paired installation. DT — Installed in pairs in series. +K — Outer ring with padding. +L — Inner ring with padding. +KL — Inner and outer rings with linings. (7) Clearance C1 – radial clearance of a radial bearing, smaller than clearance C2. C2 —— Radial clearance of the radial bearing, smaller than the standard clearance. CN (omitted) — radial standard clearance for radial bearings. C3 — radial clearance of the radial bearing, larger than the standard clearance. C4 — radial clearance of the radial bearing, larger than that of C3. C5 — radial clearance of the radial bearing, which is larger than that of C4. CC1 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is smaller than that of CC2. CC2 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is smaller than the standard clearance. CC — Cylindrical roller bearing (non-interchangeable), radial standard clearance. CC3 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than the standard clearance. CC4 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than that of CC3. CC5 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than that of CC4. MC1 — Small, miniature ball bearings with radial clearance, having less clearance than MC2. MC2 — small, miniature ball bearings with radial clearance, having less clearance than MC3. MC3 — Small and miniature ball bearings, radial clearance: standard clearance. MC4 — Small, miniature ball bearings with radial clearance, larger clearance than MC3. MC5 — small and miniature ball bearings with radial clearance, larger than that of MC4. MC6 — Small, miniature ball bearings with radial clearance, larger clearance than MC5. CM — radial clearance for deep groove ball bearings and cylindrical roller bearings used in motors. CT — Radial play of cylindrical roller bearings for motors. (8) Tolerance grade P0 (omitted) – The tolerance grade corresponds to Grade 0 as specified in the JIS standard. P6 — The tolerance grade corresponds to level 6 as specified in the JIS standard. P6X — The tolerance grade meets the 6X level specified by the JIS standard. P5 — The tolerance grade corresponds to level 5 as specified in the JIS standard. P4 — The tolerance grade corresponds to level 4 as specified in the JIS standard. P2 — The tolerance grade corresponds to level 2 as specified in the JIS standard. (9) Special specification X26 —— The operating temperature is limited to below 150 degrees Celsius. X28 — The operating temperature is limited to below 200 degrees Celsius. X29 – The operating temperature is limited to below 250 degrees Celsius. S11 —— Self-aligning roller bearing, with a maximum operating temperature of below 200 degrees Celsius.
3. The meanings of the suffixes used for SKF four-point contact ball bearings are as follows: B20: Narrower width tolerance; C2: Axial clearance less than that of the standard grade; C2H: Axial clearance within the upper half of the C2 group’s clearance range; C2L: Axial clearance within the lower half of the C2 group’s clearance range; C3: Axial clearance greater than that of the standard grade; C4: Axial clearance greater than that of C3; CNL: Axial clearance within the lower half of the standard grade’s clearance range; FA: Machined steel retainer, with the outer ring providing guidance; MA: Machined brass retainer, with the outer ring providing guidance; N2: Outer ring with two positioning grooves 180 degrees apart; PHA: Injection-molded polyether ether ketone (PEEK) retainer, with the outer ring providing guidance; P6: Dimensional accuracy and rotational precision meet ISO tolerance class 6; P63: P6 + C3; P64: P6 + C4; S1: Special heat treatment, ensuring that the bearing rings remain dimensionally stable at temperatures below +200 degrees; 344524: C2H + CNL.
The meanings of the suffixes used for SKF cylindrical roller thrust bearings are as follows: HB1: Bainited shaft and raceway rings; M: Machined brass retainer; P5: Dimensional and rotational precision meet ISO tolerance class 5; TN: Injection-molded glass fiber reinforced nylon 6,6 retainer.
Additional code explanations for NSK bearings: The codes for NSK bearings consist of a basic code, a prefix code, and a suffix code. The basic code indicates the inner diameter size and contact angle within the bearing series (including type) ； The prefix code indicates a specific bearing ； A suffix code is a supplementary code added after the basic bearing code when there are changes in the bearing’s structural shape, dimensions, material, sealing, cage, tolerances, clearance, heat treatment, lubrication, or technical requirements. We have discussed NSK’s suffix codes before; today we will give a brief explanation of the prefix codes and basic codes for NSK bearings. Prefix codes: F: Deep groove ball bearings with flanged outer rings; HR: High-load tapered roller bearings; MF: Deep groove ball bearings of specific dimensions. Basic codes (contact angle codes): A: Angular contact ball bearings, with a contact angle of 30 degrees; A5: Angular contact ball bearings, with a contact angle of 25 degrees; B: Angular contact ball bearings, with a contact angle of 40 degrees; C: Angular contact ball bearings, with a contact angle of 15 degrees; C: Tapered roller bearings, with a contact angle of 20 degrees; D: Tapered roller bearings, with a contact angle of 28 degrees. NSK suffix codes: (1) Internal structure – Bearings whose internal design differs from the standard. A — Angular contact ball bearing with a contact angle of 30 degrees. A5 — Angular contact ball bearing with a contact angle of 25 degrees. B — Angular contact ball bearing with a contact angle of 40 degrees. C — Angular contact ball bearing with a contact angle of 15 degrees. C — Tapered roller bearing with a contact angle of 20 degrees. D — Tapered roller bearing with a contact angle of 28 degrees. C, CA (with brass solid cage), CD (with stamped cage) – high-load self-aligning roller bearings. E — High-load cylindrical roller bearings. H — High-load thrust self-aligning roller bearing. J — The minor diameter, angle, and outer ring width of the raceway in tapered roller bearings are in accordance with ISO specifications. (2) Material g – ring, with rolling elements made of carburized steel. H — Ring type, with rolling elements made of stainless steel. (3) Retainer M – Solid copper alloy retainer. T — Synthetic resin retainer. W — Stamping retainer. V — No cage. (4) Seal ring, dust cover Z, ZS — dust cover with a steel plate on one side. ZZ, ZZS — dust covers with steel plates on both sides. D, DU — with a contact rubber seal ring on one side. DD, DDU — with contact rubber seals on both sides. V —— With a non-contact rubber seal ring. VV —— With non-contact rubber seals on both sides. (5) Ring shape K – conical hole, taper 1:12. K30 —— Tapered hole, taper 1:30. E — The ring has cuts or oil holes. E4 — Outer ring with oil grooves and oil holes. N — Outer ring outer diameter with stop groove. NR — Outer ring with a stop groove on the outer diameter, stop ring. (6) Coupling and gasket DB — installed in back-to-back pairs. DF — Face-to-face paired installation. DT — Installed in pairs in series. +K — Outer ring with padding. +L — Inner ring with padding. +KL — Inner and outer rings with linings. (7) Clearance C1 – radial clearance of a radial bearing, smaller than clearance C2. C2 —— Radial clearance of the radial bearing, smaller than the standard clearance. CN (omitted) — radial standard clearance for radial bearings. C3 — radial clearance of the radial bearing, larger than the standard clearance. C4 — radial clearance of the radial bearing, larger than that of C3. C5 — radial clearance of the radial bearing, which is larger than that of C4. CC1 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is smaller than that of CC2. CC2 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is smaller than the standard clearance. CC — Cylindrical roller bearing (non-interchangeable), radial standard clearance. CC3 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than the standard clearance. CC4 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than that of CC3. CC5 — Cylindrical roller bearing (non-interchangeable), with radial clearance that is greater than that of CC4. MC1 — Small, miniature ball bearings with radial clearance, having less clearance than MC2. MC2 — small, miniature ball bearings with radial clearance, having less clearance than MC3. MC3 — Small and miniature ball bearings, radial clearance: standard clearance. MC4 — Small, miniature ball bearings with radial clearance, larger clearance than MC3. MC5 — small and miniature ball bearings with radial clearance, larger than that of MC4. MC6 — Small, miniature ball bearings with radial clearance, larger clearance than MC5. CM — radial clearance for deep groove ball bearings and cylindrical roller bearings used in motors. CT — Radial play of cylindrical roller bearings for motors. (8) Tolerance grade P0 (omitted) – The tolerance grade corresponds to Grade 0 as specified in the JIS standard. P6 — The tolerance grade corresponds to level 6 as specified in the JIS standard. P6X — The tolerance grade meets the 6X level specified by the JIS standard. P5 — The tolerance grade corresponds to level 5 as specified in the JIS standard. P4 — The tolerance grade corresponds to level 4 as specified in the JIS standard. P2 — The tolerance grade corresponds to level 2 as specified in the JIS standard. (9) Special specification X26 —— The operating temperature is limited to below 150 degrees Celsius. X28 — The operating temperature is limited to below 200 degrees Celsius. X29 – The operating temperature is limited to below 250 degrees Celsius. S11 —— Self-aligning roller bearing, with a maximum operating temperature of below 200 degrees Celsius.
CA (with brass solid cage), P5: Dimensions and rotational accuracy meet ISO tolerance class 5