CORE Knob Ball Bearings | Set of 4 | 4x7x2.5

4 handpicked ball bearings for your Knobs with ABEC-5 precision rating.

Sale price 16.95 €Regular price
Regular price 16.95 €
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Technik-Check
Toleranz ABEC-5
Korrosionsschutz 6/10
Kugellager 4
The stainless steel ball bearings in ABEC 5 quality ensure a smooth operation of your knobs! The set includes four...

CORE Knob Ball Bearings | Set of 4 | 4x7x2.5

RL - Angelrollentuning - CORE Knob Kugellager | 4er Set | 4x7x2,5 - BC Kugellager -

The stainless steel ball bearings in ABEC 5 quality ensure a smooth operation of your knobs!

The set includes four ball bearings each in the size 4x7x2.5 mm.

The High Precision Stainless Steel Bearings ensure that your crank knob can rotate smoothly. Ideal for replacing old ball bearings or equipping new knobs with ball bearings that only contain plastic bearings.

What does ABEC mean?

ABEC is a standard that indicates how high the manufacturing tolerance is.
The higher the number, the higher the accuracy of the ball bearing's manufacturing and the smoother it runs.
The standard is only given with odd numbers.

This means that ABEC 3 ball bearings are rather low-end, followed by ABEC 5 and 7, which are the most commonly used bearings. They are usually installed as standard.


Why use tuning bearings?

In general, ball bearings installed in the reel from the factory often do not have good rotation properties because a lot of grease and dust prevent smooth operation.

The stainless steel ball bearings are delivered pre-oiled and are equipped with a anti-rubber cover that protects the bearings from dirt particles. You can remove this cover for cleaning and oiling.

You can also install the ball bearings without the cover, which will squeeze a little more speed out of the ball bearings because friction is reduced.

Long durability

The bearings are oiled as standard, but we recommend every user to re-oil the ball bearings after a season, preferably with the Alchemy Oil from Hedgehog Studio or the Premium Ball Bearing Oil from Glitch Oil.

This way you simply get longer use out of them and don't have to maintain the ball bearings as often; furthermore, the humming of the ball bearings is significantly reduced when you oil them.
Just one drop of oil is enough to enjoy them for a long time.

FAQ – Spool Bearings for Baitcasting Reels

Yes. For maximum casting distance, smooth spool start, and harmonious operation, both relevant spool bearings should always be replaced at the same time.

Only then does the bearing upgrade fully unfold its effect.

Our spool bearing sets each include the two relevant bearings for your baitcasting reel.

This gives you the complete solution for a clean and coordinated upgrade.

Installation instructions are not included.

If a bearing is mounted on the Spool, it is usually held in place by a small retaining pin.

For a safe and damage-free removal, a Pin Remover is recommended.

This helps you avoid bent pins or damaged spool shafts.

APEX bearings are ideal for very light to medium casting weights.

EDGE bearings cover a wide all-round range.

CORE bearings are designed for higher continuous loads and heavy lures.

What matters is your typical area of use.

Open the sideplate of your reel and remove the spool.

If a bearing is located directly on the spool shaft, it is the design with spool bearing.

If there is no bearing there, it is usually located in the sideplate under the spool tension.

For spool bearings, a single, thinly dosed drop of high-quality spool bearing oil is sufficient.

Too much oil creates unnecessary resistance and reduces the rotation speed.

Yes, absolutely. The DC system electronically regulates the braking curve, but it does not replace mechanical friction in the spool bearing.

A high-quality spool bearing significantly reduces this friction and noticeably improves spool startup. The spool starts faster, runs more freely, and responds more sensitively.

This is especially noticeable in the light to medium casting weight range.

DC is not a brake against performance, but a complement to mechanical optimization. A precise spool bearing and the DC system work together, not against each other.