HR30224JP6 taper roller bearing 120×215mm
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HR30224JP6 taper roller bearing 120×215mm
A quarry maintenance crew is rebuilding the head pulley drive on a primary conveyor. The gearbox output shaft runs a 120 mm journal, and the replacement bearing must sit in a 215 mm housing while carrying radial load and the axial thrust from the helical stage. That is the sort of duty where the HR30224JP6 enters the procurement conversation. Before the purchase order goes out, verify more than the model number on the drawing.
At a glance
- Specification: Value
- Number: HR30224JP6
- Dimensions (d×D×B): 120 × 215 × 43.5 mm
- Weight: 6.28 kg
Confirm the mounting envelope first
The HR30224JP6 is a single row metric design tapered roller bearing with a 120 mm bore, 215 mm outside diameter and 43.5 mm width. Those numbers decide whether it enters the housing, seats against the shoulder and leaves room for the seal. A common error is approving a substitute that matches bore and outside diameter but changes width or contact angle. On a tapered roller bearing, that can shift shaft position and disturb gear mesh. Check also for cylindrical bore and the 302 series envelope. If the drawing calls for a matched set or specific axial clearance, state it in the RFQ.
Put the ratings and speed limits in one view
Use this table for first-pass screening, not as a substitute for a duty-cycle calculation. The dynamic and static ratings show radial load margin; the speed limits show whether lubrication and sealing can keep up.
| Specification | Value |
|---|---|
| Number | HR30224JP6 |
| Dimensions (d×D×B) | 120 × 215 × 43.5 mm |
| Weight | 6.28 kg |
| Series | HR302 series (302..JP6) |
| Cage | Pressed steel or pin type |
| Basic dynamic load rating (Cr) | 334247 N |
| Basic static load rating (Cor) | 447760 N |
| Reference speed | 1575 r/min |
| Limiting speed | 2145 r/min |
For a conveyor gearbox, radial load usually dominates, but axial load from helical gearing is not zero. Compare equivalent load with the 334247 N dynamic rating and check the static rating against peak shock or stall. If operating speed sits close to the 2145 r/min limiting value, review lubricant viscosity and cooling before ordering.
Fit and tolerance deserve their own check
Tapered roller bearings are sensitive to shaft and housing fits because internal clearance is set at mounting. A loose press fit allows creep; an over-tight fit can close clearance and raise running temperature. Ask the supplier to confirm tolerance class and recommended fits for your load direction. For this 120×215 mm envelope, measure the actual journal and housing bore.
Before you approve the drawing, confirm:
- Shaft diameter and housing bore measured at the mounting position, with roundness and taper recorded.
- Required axial clearance or preload, and whether it is set by shims, spacer or nut.
- Shoulder squareness and fillet radius at both shaft and housing seats.
- Lubrication method, oil level or grease fill, and seal type.
- Mounting procedure: press force on the inner ring only, never through the rollers.
If any point is unclear, ask for the mounting drawing before shipment. It is cheaper than replacing a bearing installed with the wrong end play.
Read the suffix and cage notation
The HR30224JP6 sits in the HR302 series (302..JP6). The cage can be pressed steel or pin type, so the purchase order should state which one the application accepts. Pressed steel is common for general industrial duty; pin type may be specified for higher load or particular lubrication conditions. Do not leave the cage option open for high-vibration service. Use the bearing number reference to cross-check prefix, series and suffix before releasing the order. If a supplier offers an equivalent without the same suffix, ask for a comparison sheet and verify load ratings, not just boundary dimensions.
Lead time, traceability and order quantity
Procurement teams often focus on unit price and forget the cost of a line-down situation. Ask for the current lead time in writing, along with minimum order quantity and pack style. For critical gearboxes, request batch traceability and inspection records for bore, outside diameter and width. The 6.28 kg bearing should be packed to protect rollers and cage from impact. Put the same data on every RFQ—model, dimensions, cage type, required clearance, quantity and delivery date—so replies are comparable.
Request a quote with the right data
When the envelope, load margin, fit and cage choice are confirmed, ordering is straightforward. Send the drawing and operating conditions to FIJ Bearing and ask for a quotation with lead time and inspection documents. You can also review the Single row taper roller bearings category for related sizes and mounting information.
Request a quote from FIJ for HR30224JP6 and include your required clearance, cage type and delivery date.