Heavy-Duty Conveyor Components
The conveyor buffer idler roller is intended for belt conveyor positions where bulk material is transferred onto the belt. Its steel roller construction and buffer-style arrangement provide a project-specific support solution for mining, energy and other bulk material handling systems.
Product images are for reference. Confirm the final roller arrangement and technical dimensions before production.
A buffer idler is selected according to the belt width, loading-point layout, conveyed material, belt speed and support frame. The roller assembly normally includes a steel tube, shaft, bearings, seals and end supports. Where rubber rings or other buffer elements are required, their arrangement should be confirmed in the final drawing.
For general belt support positions where a flat roller arrangement is required.
For selected impact-support or return-side cleaning positions, subject to application review.
The supplied images show related conveyor roller configurations. Select the required type and roller position before quotation so the bearing, shaft and overall dimensions can be matched correctly.
| Item | Product reference | Technical note |
|---|---|---|
| Roller type | Flat / Buffer / Cleaning | The buffer version is selected for the specified conveyor position |
| Diameter | 76–219 mm | Final diameter depends on belt width, roller spacing and load |
| Length | 190–3500 mm | Confirm face length, shaft extension and frame opening |
| Tube material | Carbon steel | Pipe thickness and surface treatment follow the approved design |
| Shaft material | Cold-drawn round steel | Shaft ends must suit the conveyor mounting arrangement |
| Shaft diameter | 20 / 30 / 35 / 40 mm | OEM shaft dimensions are available subject to confirmation |
| Bearing references | 204 / 205 / 305 / 306 / 308 / 310 series | Select according to roller diameter, load and operating conditions |
| Pipe thickness | 3 / 3.5 / 4 mm and OEM | Confirm the wall thickness required for the project |
| Color | Red or black / OEM | Color and branding details should be confirmed before production |
The tables below list reference diameter, length and bearing combinations supplied for conveyor roller selection. They are intended for preliminary matching; availability must be confirmed for the selected buffer roller design and order quantity.
| D (mm) | Reference L (mm) | Bearing model |
|---|---|---|
| 89 | 180, 190, 200, 235, 240, 250, 275, 280, 305, 215, 350, 375, 380, 455, 465, 600, 750, 950, 1150 | 204 |
| 108 | 190, 200, 240, 250, 305, 315, 360, 375, 380, 455, 465, 525, 530, 600, 700, 750, 790, 800, 950, 1150, 1400, 1600 | 204, 205, 305, 306 |
| 133 | 305, 375, 380, 455, 465, 525, 530, 600, 700, 750, 790, 800, 900, 950, 1000, 1100, 1150, 1400, 1600, 1800, 2000, 2200 | 205, 305, 306 |
| 159 | 375, 380, 455, 465, 525, 600, 700, 750, 790, 800, 900, 1000, 1050, 1100, 1120, 1150, 1250, 1400, 1500, 1600, 1700, 1800, 2000, 2200, 2500, 2800, 3000, 3150 | 305, 306, 308 |
| 193.7 | 2200, 2500, 2800, 3000, 3150, 3350 | 308, 310 |
| 217 | 600, 640, 1050, 1120, 1600, 1700, 3150, 3350 | 308, 310 |
Alternative bearing and length combinations may be available for different conveyor arrangements. Use the reference tables together with the belt width, roller position and frame drawing when selecting a buffer idler.
| D (mm) | Reference L (mm) | Bearing model |
|---|---|---|
| 89 | 190, 200, 230, 240, 280, 305, 315, 375, 380, 455, 465, 600, 750, 950, 1150 | 204 |
| 108 | 190, 200, 240, 250, 305, 315, 375, 380, 455, 465, 525, 600, 700, 750, 800, 950, 1150, 1400 | 205 |
| 133 | 305, 350, 375, 380, 455, 525, 530, 600, 700, 790, 800, 950, 1150, 1400, 1600 | 305 |
| 159 | 375, 380, 455, 465, 525, 600, 630, 640, 670, 700, 750, 790, 800, 900, 950, 1050, 1120, 1150, 1400, 1600 | 306, 308 |
Mining conveyors
Construction materials
Energy and bulk handling
Before ordering, confirm the material type, loading method, belt speed, roller position, quantity and operating environment. These details support selection of a suitable buffer idler configuration.
Carton packing is available for the product reference. Final packing quantity, labeling, protection method and delivery arrangement should be confirmed according to the roller size, order quantity and destination.
Ningbo Sinoconve Belt Co., Ltd. supplies conveyor belts, conveyor rollers and related material-handling components. The company combines product resources, technical support and customer service to provide OEM solutions for mining and bulk material conveyor projects.
| Warranty | 6 months | Outgoing inspection | Video inspection provided |
| Machinery test report | Provided | Origin | China |
| After-warranty service | Video technical support and online support | Brand | OEM |
| Applicable industry | Energy and mining | ||
Send your conveyor drawing, roller dimensions, bearing requirement, quantity and destination for technical matching.
Inquiry NowPRODUCTS

We are focusing on material handling, power transmission and industry application.