Buyer context
Who this guide is written for.
Mining maintenance teams, quarry operators, cement plants, coal handling projects, port bulk-handling buyers, and distributors preparing conveyor spare part RFQs.
Most conveyor replacement inquiries reach a supplier in one of three situations: a roller has failed, a shutdown list is being prepared, or a distributor needs repeat stock for a known belt line. In each case, speed matters, but incomplete information usually slows the quote down more than the supplier does.
For mining conveyors, two rollers with the same outside diameter can still use different shaft ends, bearing arrangements, seal structures, tube wall thickness, or installed positions. Pulleys create another layer of risk because the buyer must define drum size, face width, shaft and bearing arrangement, lagging pattern, hardness, and whether the unit is used as a drive, bend, snub, or tail pulley.
The practical approach is to send a line-by-line RFQ. Each line should show the part type, dimensions or drawing status, quantity, working condition, destination, and deadline. That gives the factory enough context to review fit, process route, packing, and lead time before a formal quote is issued.
Product scope
Product scope this RFQ route can cover.
Mismatch risks
Where quotes usually go wrong.
The roller looks correct, but the shaft end is wrong.
- Cause
- The RFQ gives roller diameter and length, but not shaft diameter, flat width, slot, thread, or installed bracket detail.
- Buyer loss
- The roller cannot be fitted during shutdown, or the buyer must rework brackets on site.
- Control
- Send end-view photos, shaft-end dimensions, bearing model, seal detail, and a drawing when available.
The seal type is not suitable for wet fines or abrasive dust.
- Cause
- The inquiry only says conveyor roller without describing site moisture, dust, material type, or cleaning condition.
- Buyer loss
- Bearing life becomes shorter than expected, and repeat failure is blamed on price instead of specification.
- Control
- State material handled, working environment, seal type if known, and whether the roller is for carrying, return, impact, or training position.
A trough frame or bracket does not match the installed conveyor.
- Cause
- The buyer sends a photo, but trough angle, mounting hole pattern, roller spacing, left/right orientation, and frame width are not confirmed.
- Buyer loss
- The frame may arrive with the wrong hole positions or angle, causing installation delay.
- Control
- Measure hole centers, trough angle, roller diameter, belt width, frame orientation, and coating requirement before quotation.
Pulley lagging is specified too loosely.
- Cause
- The RFQ says rubber lagged pulley, but not lagging pattern, thickness, hardness, shell size, shaft arrangement, or pulley duty.
- Buyer loss
- A quotation may look cheaper because it is not built to the same duty condition.
- Control
- List pulley type, belt width, drum diameter, face width, shaft and bearing arrangement, lagging pattern, and site duty.
A mixed conveyor list is treated as one product.
- Cause
- Rollers, pulleys, frames, liners, shafts, and fabricated items are sent in one paragraph instead of separate item lines.
- Buyer loss
- The supplier returns many questions, or the buyer receives an incomplete quote that cannot be compared.
- Control
- Use one RFQ line per item, with quantity, drawing status, dimensions, material, destination, and required delivery window.
RFQ fields
Information to put in the first email.
| Scope | Send | Why it matters |
|---|---|---|
| Conveyor and site | Belt width, conveyor section, installed position, material handled, wet or dusty condition, and shutdown date if urgent. | The same spare part can need a different design or packing approach depending on the conveyor duty and maintenance window. |
| Idler rollers | Roller diameter, tube length, shaft diameter, shaft-end detail, bearing model, seal type, tube wall, coating, and quantity. | Roller mismatch usually happens at the shaft end, bearing seat, seal structure, or installed position. |
| Pulley assemblies | Pulley type, belt width, drum diameter, face width, shaft and bearing arrangement, lagging thickness, lagging pattern, and drawing. | Pulley quotations cannot be compared fairly unless shell, shaft, bearing, and lagging scope are defined. |
| Frames and brackets | Trough angle, frame width, mounting hole pattern, roller spacing, left or right orientation, steel grade, and coating requirement. | Small geometry differences can make the part difficult to install even when the general appearance is similar. |
| Wear liners and transfer parts | Material handled, impact point, liner type, plate thickness, bolt pattern, drawings, and photos of the worn area. | Transfer points need wear and fit review, not just a material name. |
| Commercial and export details | Quantity by line item, destination port, packing requirement, inspection request, partial shipment need, and target delivery date. | Heavy or long conveyor parts often need packing and loading checks before lead time is confirmed. |
Review route
How this RFQ should be cleaned up.
- Split the list before asking for price.Separate rollers, pulleys, frames, liners, shafts, and fabricated items into individual lines. A mixed list is acceptable, but it should not be one vague product description.
- Mark what is measured, drawn, or only photographed.A drawing is best. A sample can start the review. A photo is useful for orientation, but dimensions and installed position are still needed before a reliable quote.
- Confirm the detail that controls fit first.For rollers, check shaft end and bearing/seal detail. For pulleys, check shaft arrangement and lagging. For frames, check trough angle and hole pattern.
- Return questions before the quote is locked.If any fit detail is missing, it is better to ask a short technical question than issue a fast quotation that cannot be installed.
- Add packing and inspection only after item scope is clear.Export packing, pallet length, crate protection, rotation checks, coating checks, and third-party inspection should be tied to the final item list.
Factory review points
Control points buyers should ask suppliers to check.
- Dimensional check for roller diameter, face length, shaft end, and bearing position.
- Bearing model and seal structure confirmation before batch production.
- Pulley shell size, shaft arrangement, lagging pattern, and surface condition review.
- Frame hole pattern, trough angle, straightness, coating, and left/right orientation check.
- Wear liner bolt pattern, plate thickness, material route, and installed impact area review.
- Pallet, crate, part mark, moisture protection, and mixed-item separation for export shipments.
FAQ
Common questions before sending this inquiry.
Can conveyor replacement parts be quoted from photos only?
Photos can start the review, especially for identifying the installed position, but they are not enough for a reliable quote. Roller shaft ends, bearing model, seal type, pulley shaft arrangement, frame hole pattern, and liner dimensions still need to be confirmed.
Should I send part numbers or dimensions?
Send both when possible. Part numbers help identify the product family, but dimensions and photos protect against supplier-specific versions, old revisions, and site modifications.
Can rollers, pulleys, frames, and wear liners be sent in one RFQ?
Yes. A mixed conveyor RFQ is common, but each item should be separated by line with quantity, drawing status, dimensions, material or coating notes, and destination.
What should be done when the shutdown date is close?
State the shutdown date, the must-have items, and whether partial shipment is acceptable. It is better to identify critical items first than wait for every low-risk line to be complete.