6300 Series Deep Groove Ball Bearings

Series overview

6300 Series Deep Groove Ball Bearings

6300 series deep groove ball bearing product photo

Built for the Heaviest Loads in the Standard Range

The 6300 series covers the same bore range as our 6000 and 6200 series — 10mm to 100mm across 21 standard models (6300–6320) — but takes cross-section further. Larger balls and a thicker outer ring push dynamic and static load ratings well above the 6200 series at every bore size, at some cost to maximum speed. Reach for the 6300 series when a job needs that extra load margin and there's room in the housing for a larger bearing.

6300–6320 Bore 10–100mm Open ZZ 2RZ 2RS

Bearing No.	Bore d mm	OD D mm	Width B mm	Chamfer r min mm	Dynamic Cr kN	Static Cor kN	Ball No.	Ball Size mm	Grease r/min	Oil r/min	Weight kg/pc
6300	10	35	11	0.6	8.2	3.5	6	7.144	23000	27000	0.053
6301	12	37	12	1.0	9.7	4.2	6	7.938	20000	24000	0.060
6302	15	42	13	1.0	11.4	5.45	7	7.938	17000	21000	0.082
6303	17	47	14	1.0	13.5	6.55	7	8.731	16000	19000	0.115
6304	20	52	15	1.1	15.9	7.90	7	9.525	14000	17000	0.144
6305	25	62	17	1.1	21.2	10.90	7	11.500	12000	14000	0.232
6306	30	72	19	1.1	26.7	15.0	8	12.000	10000	12000	0.360
6307	35	80	21	1.5	33.5	19.1	8	13.494	8800	10000	0.457
6308	40	90	23	1.5	40.5	24.0	8	15.081	7800	9200	0.630
6309	45	100	25	1.5	53.0	32.0	8	17.462	7000	8200	0.814
6310	50	110	27	2.0	62.0	38.5	8	19.05	6400	7500	1.070
6311	55	120	29	2.0	71.5	45.0	8	20.638	5800	6800	1.370
6312	60	130	31	2.1	82.0	52.0	8	22.225	5400	6300	1.730
6313	65	140	33	2.1	92.5	60.0	8	24.00	4900	5800	2.080
6314	70	150	35	2.1	104.0	68.0	8	25.40	4600	5400	2.520
6315	75	160	37	2.1	113	77.0	8	26.988	4300	5000	3.020
6316	80	170	39	2.1	123	86.5	8	28.575	4000	4700	3.590
6317	85	180	41	3.0	133	97.0	8	30.1625	3800	4500	4.230
6318	90	190	43	3.0	143	107	8	31.75	3600	4200	4.910
6319	95	200	45	3.0	153	119	8	34.000	3300	3900	5.670
6320	100	210	47	3.0	173	141	8	36.512	3200	3700	7.000

Note: Dynamic (Cr) and static (Cor) load ratings are in kN. Grease and oil lubrication speed limits are in r/min. All 21 bore sizes are available open, or sealed with ZZ, 2RZ or 2RS.

Why choose 6300 series

Characteristics, Applications & Lead Time

Bearing Characteristics

The 6300 series carries the largest balls and thickest rings of our three standard bore-matched series, giving it the highest dynamic and static load ratings at every bore size — in several sizes nearly double the 6200 series. The trade-off is top speed: grease-lubricated limits run from 23,000 r/min at the smallest bore down to 3,200 r/min at the largest. Every bearing still passes full-image inspection before it ships.

Typical Applications

Specify the 6300 series when radial or axial load is the deciding factor rather than speed or space: gearboxes, conveyor rollers, industrial drives, heavy-duty pumps and machinery subject to shock loading or frequent starts and stops.

Lead Time & Minimum Order

The 6300 series is one of our core production lines, so most bore sizes are kept in stock or on a rolling production schedule. Sample lead time is typically 10 days; there is no strict minimum order quantity for first-time or trial orders. Send us your bore size, seal type and quantity for a specific lead time.

Common questions

Frequently Asked Questions — 6300 Series

What bore sizes and dimensions does the 6300 series cover?

The 6300 series spans 21 standard models, 6300 to 6320, with bores from 10mm to 100mm, outer diameters from 35mm to 210mm, and widths from 11mm to 47mm. Every dimension is listed in the table above.

How is the 6300 series different from the 6200 series?

Both series share the same bore sizes, but the 6300 series uses larger balls and a thicker outer ring, which raises its dynamic and static load ratings well above the 6200 series — in some sizes by close to double. The trade-off is a lower maximum speed at the same bore size.

What load ratings can I expect from the 6300 series?

Dynamic load ratings range from 8.2 kN at the smallest bore (6300) up to 173 kN at the largest (6320), with static ratings from 3.5 kN to 141 kN. Check the Dynamic Cr and Static Cor columns above for the exact figures at your bore size.

What seal options are available?

Every model in the 6300 series is available open, or sealed with ZZ (metal shields), 2RZ (low-friction rubber seal) or 2RS (contact rubber seal). ZZ and 2RZ suit higher-speed, cleaner environments; 2RS gives the strongest protection against dust and moisture at a slightly lower top speed.

What's the maximum speed for 6300 series bearings?

Speed drops off faster in this series than in the 6000 or 6200 series because of the larger ball size. Grease-lubricated limits run from around 23,000 r/min for the smallest bores (6300–6303) down to 3,200–4,000 r/min for the largest (6317–6320).

Can the 6300 series handle axial as well as radial loads?

Yes. Like all our deep groove ball bearings, the 6300 series is designed primarily for radial loads but also handles moderate axial loads in either direction — part of why it suits gearboxes and drive shafts that see combined loading.

Are 6300 series bearings interchangeable with other brands?

Yes. The 6300 numbering follows the same ISO standard used industry-wide, so our bearings match the bore, outer diameter and width of the equivalent SKF, NSK, NTN, FAG or Koyo 6300-series part. Send us your current part number and we'll confirm the match.

What's the lead time, and can I get custom specs?

Sample lead time is typically 10 days, with most bore sizes kept in stock or on a rolling production schedule and no strict minimum order for trial quantities. We also accept custom bore sizes, tighter clearance classes and special grease fills within the 6300 series — send us your requirement and we'll confirm feasibility before quoting.

Get a Quote for 6300 Series