6205 Pool & Spa Pump Motor Bearing 2RS Sealed - ID 25mm, OD 52mm, W 15mm

Pool & Spa Pump Motor Bearing 6205 2RS Sealed - ID 25mm, OD 52mm, W 15mm

• Physically Stocked, unlike most "drop-shipping" websites.
• Shipped from VIC, NSW, WA, QLD

Sealed 6205 deep groove ball bearing for pool and spa pump electric motors. The largest of the 6200-series sizes we stock, with a 25mm shaft bore, a 52mm outside diameter and a 15mm width.

Supplied from premium manufacturers including NTN, FAG, SKF, Nachi, NSK, Koyo/JTEKT and Timken, depending on availability. All are sealed motor bearings suitable for the application.

Check Your Existing Bearing Before Ordering

While these bearings are the sizes commonly used in the pumps listed below, we recommend double checking your current bearings before ordering. Brands use several variants of motor across a model's production life, so the pump model on the nameplate does not always identify the bearing fitted inside the motor.

Specifications

• Bearing designation: 6205
• Inside diameter (bore): 25mm
• Outside diameter: 52mm
• Width: 15mm
• Type: single row deep groove ball bearing
• Sealing: 2RS, rubber sealed both sides
• Sold as: single bearing

Where This Size Is Used

• A larger 6200-series motor bearing used in some higher-output electric pump motors, where the 25mm shaft calls for it.
• Astralpool / Hurlcon: Astralpool service part 40279 is a 6205 front bearing listed for the 3HP Notos motor. The Astralpool range also uses 6202, 6203 and 6204 depending on the motor, so confirm which bearing your motor takes. The genuine Astralpool part is listed separately as Bearing Front 6205-3HP Notos 40279.
• No universal Australian pump-model fitment should be assumed from the pump brand or horsepower alone. Dismantle the motor and identify the bearing before ordering.

Not To Be Confused With The 6304

The 6304 shares the 52mm outside diameter and the 15mm width, but has a smaller 20mm bore. The shaft size is what separates them, so measure the bore rather than the outside of the bearing.

How To Identify The Bearing You Need

• The most reliable method is to read the number stamped on the face of the old bearing. A 6205 will be marked 6205, usually followed by a suffix such as 2RS, 2RS1, 2RSH, DDU or C3.
• If the marking is unreadable, measure the bore, the outside diameter and the width with vernier calipers and match them to the figures above.
• The four-digit number sets the dimensions. Suffixes describe sealing type and internal clearance. Where the motor specifies a particular suffix or a special bearing arrangement, match that specification as well.

Symptoms Of A Failed Pump Motor Bearing

• A rumble, growl or grinding that rises and falls with motor speed
• A high-pitched squeal on start-up that settles once warm
• Noise that gets steadily worse over weeks rather than appearing overnight
• A shaft that feels notchy or rough when turned by hand with the power isolated
• Motor running noticeably hotter than usual

Find Out Why It Failed

Pump motor bearings rarely fail from age alone. The most common cause is a weeping mechanical seal letting water track back along the shaft into the front bearing. Fitting new bearings without replacing the mechanical seal usually means doing the job again. Check that the shaft slinger is present and intact while the motor is apart.

Fitting Notes

Bearing replacement needs a puller and a press or a correctly sized drift. Never drive a bearing on by hitting the outer race, which brinells the tracks and guarantees early failure. Always replace both bearings, never one. This is workshop work for someone equipped to do it, and electrical reconnection must be carried out by a licensed electrician.

Other Pump Motor Bearing Sizes

• 6201 - ID 12mm, OD 32mm, W 10mm
• 6202 - ID 15mm, OD 35mm, W 11mm
• 6203 - ID 17mm, OD 40mm, W 12mm
• 6204 - ID 20mm, OD 47mm, W 14mm
• 6302 - ID 15mm, OD 42mm, W 13mm
• 6303 - ID 17mm, OD 47mm, W 14mm
• 6304 - ID 20mm, OD 52mm, W 15mm

Frequently Asked Questions

What size is a 6205 bearing?
25mm inside diameter, 52mm outside diameter and 15mm wide.

My bearing measures 52mm across. Is it a 6205 or a 6304?
Check the bore. A 6205 has a 25mm bore and a 6304 has a 20mm bore. Both are 52mm outside diameter and 15mm wide.

Is the Astralpool 40279 a 6205?
Yes. Astralpool part 40279 is a 6205 front bearing listed for the 3HP Notos motor. Confirm the bearing in your own motor, because the range uses several sizes.

Do I need one bearing or two?
Most pump motors use two bearings, and they are not always the same size. Check both ends of the motor, and always replace them as a pair.

Important Before Ordering: Please ensure you order correctly. Confirm this product is suitable before ordering. Seek professional assistance, or contact us with photos of your existing part, model details, serial numbers, and any labels.

As with all products, these must be diagnosed and fitted by a qualified and experienced person.