CT52A Thrust Bearing — Clutch Release Bearing for 2-3.5 Ton Forklift Manual Transmissions

The CT52A is a thrust-type clutch release bearing designed for manual-transmission forklifts in the 2-3.5 ton class — distinguished from the 9688211-series bearings by its CT prefix designation, which identifies a specific dimensional and load-rating variant used across multiple Asian forklift manufacturers including TCM, Komatsu, and Nissan. In bearing terminology, a “thrust bearing” designation indicates that this bearing is specifically engineered for axial (thrust) loading rather than radial loading — it is designed to absorb the force of the release fork pushing it forward against the diaphragm spring fingers, not to support a rotating shaft radially. The CT52A designation maps to a specific set of dimensions (typically tracking to 52mm OD with related ID and width specifications), and the “A” suffix distinguishes it from earlier CT52 variants that may have different seal configurations or internal clearances.

The most critical compatibility distinction with the CT52A versus the 9688211 bearing is the bearing face profile. While the 9688211 uses a spherical-radius contact face for full-line finger contact, the CT52A may use a flat or slightly crowned face profile depending on the original equipment specification of the forklift it was designed for. These two face profiles are not interchangeable without consequences: installing a spherical-face bearing in a CT52A application where the release fork geometry is designed for a flat-face bearing creates a point-contact condition at the fork-to-bearing interface rather than the full-contact area the fork pads were designed for, concentrating the actuation force onto a much smaller area and causing accelerated fork pad wear and potential fork bending. The opposite substitution — a flat-face CT52A bearing in a 9688211 spherical-face application — creates edge-loading on the diaphragm fingers that leads to finger tip cracking within the first 500-1,000 operating hours.

Direct replacement for TCM FD20-FD35, Komatsu FD/FG 20-35, Nissan FD/FG 20-35, and other Asian-manufactured 2-3.5 ton manual-clutch forklifts specifying the CT52A release bearing. Always verify the bearing face profile against your existing unit, measure the OD/ID/width, and check that the release fork contact pads seat fully against the bearing face. Replace simultaneously with the clutch disc and pressure plate. Apply a light coat of high-temperature grease to the bearing face and fork contact pads during installation. For other release bearing variants, browse our transmission parts category. Reference OEM at Heli official website.

Technical Specifications

• SKU: CT52A-BRG
• Key Differentiator: CT52A thrust bearing — flat/crowned face profile for TCM/Komatsu/Nissan fork geometry. Verify face profile before substituting with 9688211 (spherical face) bearings.
• Type: CT52A Thrust-Type Clutch Release Bearing
• Bearing Type: Thrust (Axial Load) — Angular Contact Design
• Application: TCM, Komatsu, Nissan 2-3.5 Ton Manual Clutch Forklifts
• Warranty: 12 Months

Compatible Forklift Models

Kingstream CT52A bearings are individually grease-protected, packed in rigid cartons. QC: rotation smoothness, face profile measurement, seal integrity. 12-month warranty. Contact us for fitment verification or fleet pricing.