6204 Pool & Spa Pump Motor Bearing 2RS Sealed - ID 20mm, OD 47mm, W 14mm

Pool & Spa Pump Motor Bearing 6204 2RS Sealed - ID 20mm, OD 47mm, W 14mm

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

Sealed 6204 deep groove ball bearing for pool and spa pump electric motors. A 20mm shaft bore, a 47mm outside diameter and a 14mm width. This is one of the most common larger bearing sizes in Australian pool and spa pump motors.

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: 6204
• Inside diameter (bore): 20mm
• Outside diameter: 47mm
• Width: 14mm
• Type: single row deep groove ball bearing
• Sealing: 2RS, rubber sealed both sides
• Sold as: single bearing

Where This Size Is Used

• Onga / Pentair: Onga service bearing reference 703612 is a 6204-size bearing used in Australian Onga pump motors. Bearing position and application vary with the particular motor.
• Astralpool / Hurlcon: Astralpool service part 71299 is a 6204 front pump bearing. The Astralpool range also uses 6202, 6203 and 6205 depending on the motor, so confirm which bearing sits at which end of your motor. The genuine Astralpool part is listed separately as Bearing Front 6204 Pump 71299.
• Commonly encountered as the larger bearing in higher-output pool and spa pump motors.
• Also encountered in various Davey SpaPower/QB, LX Whirlpool, SpaNET and Spa-Quip/Spatex jet pump motors. Motor construction has varied across production runs, so physically confirm the bearing before ordering.

Not To Be Confused With The 6303 Or The 6304

The 6303 is also 47mm across and 14mm wide, but has a smaller 17mm bore. The 6304 shares the 20mm bore but is 52mm across and 15mm wide. Check all three dimensions before ordering.

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 6204 will be marked 6204, 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
• 6205 - ID 25mm, OD 52mm, W 15mm
• 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 6204 bearing?
20mm inside diameter, 47mm outside diameter and 14mm wide.

Is the Onga 703612 a 6204?
Yes. Onga's service reference 703612 is a 6204-size bearing used in Australian Onga pump motors. Bearing position varies with the particular motor, so confirm against your own motor.

Is the Astralpool 71299 a 6204?
Yes. Astralpool part 71299 is the 6204 front pump bearing. Note that the Astralpool range uses several bearing sizes depending on the motor, so check both ends of yours.

My bearing measures 47mm across. Is it a 6204 or a 6303?
Check the bore. A 6204 has a 20mm bore and a 6303 has a 17mm bore. Both are 47mm outside diameter and 14mm wide.

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.