1. Product Overview 4T-30310D is single row metric tapered roller bearing with steep contact angle (D suffix stands for 24°-32° large contact angle), complete separable cone and cup assembly, overall dimension 50×110×29.25mm. Large conical contact angle greatly improves unidirectional axial load bearing capacity while maintaining heavy radial load performance, ideal for equipment with big thrust force during operation. Separable inner cone and outer cup structure simplifies