FAG C3188-XL-K-M1B toroidal roller bearing
- Brand
- FAG
- Category
- Bearings
- Subcategory
- Toroidal roller bearings
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Decoding FAG C3188-XL-K-M1B
- C 31Series
- Toroidal roller bearings, C 31 series. Series differ in outside diameter and width even when the bore is the same.
- 88Bore
- Bore 440 mm (88 × 5).
- XL-K-M1BSuffix
- FAG suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
C 3188 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
FAG C3188-XL-K-M1B measures 440 mm across the bore and 720 mm across the outside diameter; its width is 226 mm (440 x 720 x 226 mm).
FAG C3188-XL-K-M1B belongs to toroidal roller bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for C3188-XL-K-M1B and any equivalents.
FAG toroidal roller bearings handle high radial loads, combined loads and tilting moments. The crowned rollers and toroidal raceways let the bearing self-align when shafts and housings are not perfectly aligned, and it can run with oil or grease. You will find this line in gearboxes, paper machines, cranes and steel mill equipment. MR Industrial Accessories supplies these bearings and helps you match the right execution to your code.
The part number is built in blocks. A leading C marks the toroidal roller series, and the following number gives the size, as in C30/750, C31/560 or C3132. XL shows the manufacturer's improved execution. K means a tapered bore, and M1B is the machined brass cage guided by the rollers. So a code like C31/600-XL-K-M1B tells you series, size, execution, bore type and cage in one string.
Typical service includes large gearboxes, mill drives, presses, paper machines, mining equipment, overhead cranes, rolling tables and high-demand machine tools. The bearing takes high radial loads while absorbing misalignment, which suits long shafts and assemblies where perfect alignment is hard to hold. Maintenance and purchasing teams use it for both replacement and new builds.
Selection starts with radial and axial load, speed and lubrication method. A tapered bore (K) needs a suitable adapter sleeve and controlled adjustment; check internal clearance after mounting. The M1B cage is machined brass for high temperatures and speeds. Sealing depends on the environment, so add protection where contamination is present. Shaft and support alignment matters to avoid parasitic stresses.
When replacing a toroidal roller bearing, equivalents between manufacturers are common. Brands use their own prefixes and suffixes for taper, cage or special execution, so compare bore, outer diameter and width along with operating conditions. If you have the original code, send it complete; that makes the counterpart easier to identify. MR Industrial Accessories can assist with that comparison.
For a quote on an FAG toroidal roller bearing, message us on WhatsApp or email with the code or model from your equipment. The team replies promptly and can suggest equivalents and help you choose.
Dimensions
440 x 720 x 226 mm (d x D x B): boundary dimensions for basic designation C 3188, according to ISO 15.
- Bore
- 440mm
- Outside diameter (D)
- 720mm
- Width (B)
- 226mm
Frequently asked questions
- FAG C3188-XL-K-M1B bearing: what are its dimensions?
- FAG C3188-XL-K-M1B measures 440 mm across the bore and 720 mm across the outside diameter; its width is 226 mm (440 x 720 x 226 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation C 3188.
- What does the K suffix mean on an FAG bearing?
- K indicates a tapered bore. It allows mounting on an adapter sleeve or a tapered shaft, which helps with internal clearance adjustment and dismounting. It is common in high-load applications.
- How do I identify the C series of toroidal rollers?
- Look for the initial letter C followed by a number for the size, such as C30, C31 or C31/600. Suffixes XL, K and M1B mean improved execution, tapered bore and brass cage. Send the complete code and we will advise.
- What applications do toroidal roller bearings have?
- They are used in gearboxes, paper machines, cranes, steel mill equipment and mining, where they must withstand high radial loads and misalignment. The design absorbs tilting moments with adequate lubrication. Ask us about your specific application.