Ball bearings are used to reduce frictions in fishing reels. And you may add more casting distance by reducing friction, especially around spools of bait casting reels. There are a few types of bearings and please understand them well before you invest in expensive products. Size: inner D. x outer D. x thickness in mm.
|Stainless steel bearings are the standard product, and good enough product for fishing reels. I normally recommend these. Those we deal with are high-quality bearings from Japanese manufacturers, and they conform to Japan Industrial Standard class 4 (JIS-4). The JIS-4 is between the ABEC rating 3 and 5 of USA. They have enough salt-resistance, and they are inexpensive. They have the hardest race surface among these three to last the longest if serviced adequately. Material gets rust if left with salt and water.
Anti-rust bearings Called as SA-RB, A-RB, CRBB or HCRP by Shimano, Diawa or ABU. They are more resistant to saltwater than stainless steel, and more suitable for saltwater / blackish water fishing. Metal surface is treated to stand for salt, but it still gets rust left long with salt.
SIC ceramic bearings Ceramic balls are used to spin the fastest. They are built with the minimum tolerance between balls and laces, like ABEC 7, to spin with little wobbling at fast speed. They need very light, clean oil to lubricate. Frequent maintenance, after every fishing trip is required. I recommend them for surf casting competitions, and anglers who want to cast the longest.
Micro ball bearings This kind of bearings are assembled with smaller bearings and outer housings, to make spinning part the smallest to remove innertia to accelarate the fastest. For example, Daiwa SV spools employ the assembled bearing, 3x10x4 bearing and 11mm ourter housing. They are suitable for ultra light rigs, but durability will be reduced when used wtih heavy rigs.
|Bearing size (inner dia x outer dia x thickness mm)||Reels|
|3x7x3, 3x7x3||Shimano 15Aldebaran BFS XG Ltd. 16Aldebaran BFS|
|3x7x3, 3x10x4||Shimano 00Conquest 50, 05Calcutta 50, Calcutta XT50, Aldebaran BFS|
Shimano Most Shimano's except following: 00Conquest 50, 05Calcutta 50, Calcutta XT50, Aldebaran BFS. 15Conquest300/400
ABU Old 4000-6000 spool shaft fixed to spool, ABU Low Profile modelsDaiwa (spool bearing inside 11mm housing) Steez SV, Steez Ltd, SS SV, Zillion TW SV1016,
|3x10x4, 5x9x3||Shimano 15Conquest300/400,|
Daiwa 2004Presso, PX68 Finesse spool
Daiwa Tatula, Tatula CT, Tatula Type-R, Tatula CT Type-R, (inside 11mm housing) Zillion HLC, Zillion J Dream, Zillion PE, PX68, PX68 SPR, Ringa HLC, Ringa SSS
Daiwa Alphas Air (spool ball bearing 3x6x2.5 housed in collar)
|3x8x4, 5x9x3||Daiwa TD-X103Hi, TD-X103HSDF, TD-X103HV/PV, TD-S103Hi|
Daiwa TD-Fuego, TD-Zillion (except HLC, J-Dream, PE-SP), TD-Z/X/S, Millionaire(CV-X, CV-Z), Alphas 103/150, Alpha R-ed, TD-Sol, Pixy, ProcasterZ, Tryforce103
Megabass IP, ZONDA
Daiwa T3 Air, SS Air (spool ball bearing 3x8x4 housed in collar)
Daiwa 15Zillion TW 1516, Steez100-103, Ryoga1016/2020, Z2020/1016, T3(original, MX, SV), Aggrest, US Advantage, Millionaire-Snakehead, Millionaire Black sheep, Ryoga Shrapnel
Megabass IS, LINAbu Revo (SX, Premier, Elite, STX, CB, Aurora, Akatsuki)
Abu Morrum ZX1600/3600, Morrum SX-Mag, SX-Ultramag, Forrel
Abu Ultra Cast 4500-6500C spool shaft separate from spool
Abu 1500C 2500C 3500C, Morrum SX High-speed
For the bearing installed onto the spool shaft, you'll need a pin remover to replace. Here is how to replace spool bearing. Please choose plain bearings than BFS housed bearings for Daiwa with already housed bearings. Fitting housed bearing into housing might lose the balance of spool and casuse vibrations.