Koyo Bearing FAQ: Suffixes, Configurations, Quotes and Documents

A short internal stock code usually drops the suffix, and the suffix is where the seal or shield type and the internal clearance are given. Two bearings with the same base number can have different seals and clearance, so we ask for the full reference or a photo of the markings before quoting. If neither is available, tell us the equipment model and bearing position and we will mark those items as still to be confirmed.

Write each bearing as its own line with its position: drive end (DE) or non-drive end (NDE), and the shaft it sits on. When DE and NDE bearings are mixed together under one code, quantities and fitting positions go wrong. Listing positions lets us check each line against the arrangement before we quote.

The locating bearing fixes the shaft axially, while the floating bearing allows axial movement as the shaft expands with heat, so the two positions often take different Koyo series. Mark each line as floating or locating and give the shaft. We confirm which series fits each position before quoting.

"When we submitted a mixed list with floating and locating positions, they confirmed which Koyo series fit each shaft before quoting. No wrong deliveries in a year of orders."

Matching the dimensions does not mean the bearing is suitable, because the equipment may call for a particular configuration. Seals, clearance and other execution details sit outside the three dimensions. We check the full reference and configuration against the equipment model so the bearing fits the application as well as the housing.

An alternative reference is always a separate line, never a silent swap for the reference you asked for. Before quoting we ask whether you accept separately listed alternatives at all. You can then compare the original and the alternative line by line and approve or reject each one.

You know the application and are responsible for it, so we do not change the configuration without your approval. A different suffix can change sealing, clearance or the fit on the shaft. Your purchasing engineer stays in control of the specification and of repeat-order consistency.

Include the equipment model, the full brand suffix, the bearing position, adapter sleeve or housing models, quantity, destination country and postcode, and your required date. Send it by WhatsApp or email. If a reference is incomplete, attach a clear photo of the markings and note what is still to be confirmed.

Each written quotation lists the items below line by line, so distributors and purchasing teams can compare quantities and terms directly.

Price, stock status and estimated lead time hold only for the validity period written on the quotation. After it expires, ask us to recheck before you place the order. You confirm specification, quantity, delivery details, payment method and commercial terms when you order.

Yes. As an authorized Koyo / JTEKT bearing supplier, Koyo Bearings: Source Factory Direct Sales supplies genuine Koyo bearings in original packaging. Check the product labels and packaging when the goods arrive, and contact us with your order number and photos if anything looks wrong.

The quotation states which product documents can actually be supplied for your order, and that statement is what applies. We don't promise any certificate type in advance. If your project needs a particular document, say so in the inquiry so we can confirm it before you order.

They are confirmed after you place the order. At that point we agree the shipping method, dispatch timing and the transport documents your destination needs. Give us the destination country and postcode in the inquiry so the quotation already shows the right shipping and tax terms.

Check the product labels, quantities and outer condition against your order. If anything differs, contact us with the order number and photos of the labels and packaging. Photos and the order number let us trace the line and deal with it quickly.

1. 01Labels match the ordered references
2. 02Quantity per line is correct
3. 03Packaging and outer condition are intact