Thrust Ball Bearings

I.Thrust Ball Bearings carry only axial loads and cannot support radial loads. Suitable for low-speed axial positioning and load-bearing applications.

II. Classification and Code Description

1. Single-Direction Thrust Ball Bearing (Most Common)

Designation: Type 51000. Accepts axial load from one direction only. Consists of shaft washer, housing washer, steel balls and cage.

Dimension-series breakdown:

511: Extra-light series, compact overall size, low load capacity

512: Light series, mainstream general-purpose type

513: Medium series, relatively high load capacity

514: Heavy series, large load capacity

2. Double-Direction Thrust Ball Bearing

Designation: Type 52000. Capable of bearing bidirectional axial loads. Its structure includes an additional shaft washer, applied for bidirectional axial limiting.

Bore-code rules (consistent with general-purpose bearings)  00 = 10 mm; 01 = 12 mm; 02 = 15 mm; 03 = 17 mm

Code 04 and above: code value × 5

III. Common Suffix Codes

TN: Engineering-plastic cage, low operating noise

C3: Increased internal clearance for high-temperature and shock-load conditions

P6 / P5: Tolerance classes; default grade P0 is omitted from marking

Thrust ball bearings normally have no integrated sealing structures; suffixes such as RS or Z for dust shields are rarely used.

IV. Key Selection Guidelines

1. Unidirectional axial load for conventional equipment → select Series 512
2. Limited installation space with low load → select Series 511
3. Large axial load → select Series 513 / 514
4. Bidirectional axial positioning and limiting required → select doubledirection Series 52

Note: Radial loads must be strictly avoided. These bearings have low limiting speeds and are not suitable for high-speed service.

V. Operational & Assembly Reminders

1. During mounting: Shaft washer is interferencefitted to shaft; housing washer uses loose fit inside housing bore to prevent jamming.
2. Low limiting speed; not applicable for highspeed conditions.
3. Strict axial centering is required during assembly. Eccentric loading and radial forces are forbidden.

Model	d(mm)	D(mm)	T(mm)	Cr(kN)	Cor(kN)	Grease (r/min)	Oil (r/min)	W(kg)
51100	10	24	9	10.0	14.0	6700	9500	0.019
51101	12	26	9	10.2	15.2	6300	9000	0.021
51102	15	28	9	10.5	16.8	6000	8500	0.022
51103	17	30	9	10.8	18.5	5600	8000	0.024
51104	20	35	10	14.2	24.5	5300	7500	0.036
51105	25	42	11	17.2	33.8	4800	6700	0.055
51106	30	47	11	18.0	38.0	4300	6000	0.063
51107	35	52	12	21.2	48.5	4000	5300	0.084
51200	10	26	11	12.5	17.0	6000	8000	0.028
51201	12	28	11	13.2	19.0	5600	7500	0.031
51202	15	32	12	16.0	24.2	5300	7000	0.042
51203	17	35	12	16.8	27.5	4800	6300	0.048
51204	20	40	14	22.2	37.5	4500	6000	0.078
51205	25	47	15	27.8	50.5	4000	5300	0.110
51206	30	52	16	28.5	55.2	3600	4800	0.130
51207	35	62	18	37.3	73.2	3000	4000	0.195
51304	20	47	18	35.0	54.8	3600	4800	0.140
51305	25	52	18	35.5	61.5	3200	4300	0.160
51306	30	60	21	42.8	78.5	2800	3800	0.240
51307	35	68	24	55.5	102	2400	3400	0.360
52205	25	47	24	27.8	50.5	4000	5300	0.170
52206	30	52	25	28.5	55.2	3600	4800	0.200
52207	35	62	27	37.3	73.2	3000	4000	0.310