Service detail
V-belt drive design and maintenance programmes.
Belt-section selection, drive-layout design and tensioning schedules against the load envelope, with a preventative maintenance routine handed to your crew, not buried in a binder.
Ad-hoc replacement burns spares on the wrong cycle and shocks the maintenance budget when two failures land in the same week. A programme, scoped against the actual duty rather than the nameplate, gives longer belt life, lower slip losses and fewer sheave changeouts.
What you get
A programme. Not a binder of product brochures.
On the asset, against the duty envelope, scoped by the same director who wrote the shaft-laser brief.
Why a programme
Four reasons a programme beats ad-hoc replacement.
Each of these is a typical finding on a Bowen Basin belt fleet that has been running on the change-out-when-it-fails cycle. The programme scopes against the duty envelope and leaves the routine with your crew.
Longer belt life
Belts that run at the right tension, on the right profile, against sheaves that are still in spec, routinely hit two to three times the rated service life. The re-tension cycles stop driving the change-out schedule.
Lower slip losses
An under-tensioned V-belt drive is bleeding horsepower as heat the whole time it is running. A programme closes the slip-loss gap before it shows up as burned sheaves or a stalled conveyor under peak load.
Fewer sheave changeouts
Sheaves wear in from a mismatched belt profile long before the belt gives up. Specifying belt and sheave together keeps the drive geometry intact across change-outs, so the next belt is running on the intended groove.
Predictable spares spend
Ad-hoc replacement burns spares on the wrong cycle and shocks the maintenance budget when two failures land in the same week. A scoped programme puts belt, sheave and tensioner stock against a reviewable schedule.
Design scope
Four steps from profile selection to tensioner specification.
The same four-step scope on every V-belt engagement — the rigour of the steps is what makes the design report worth keeping, not the belt catalogue.
01
V-belt profile & section selection
Profile and section (A, B, C, D, SPA, SPB, etc.) chosen against the duty envelope, the driver speed and the shock load, not against whatever the store shelf stocks. Multi-belt configurations are sized for the worst-case sheave at the start, not for the average.
02
Drive-ratio check
Ratio and centre distance verified against the actual driver and driven sheaves on the asset. A nameplate ratio can drift significantly from the installed geometry once worn sheaves have been swapped one at a time over the life of the drive.
03
Sheave alignment specification
Sheave alignment and parallelism specified to belt-programme tolerance, not generic laser tolerance. The alignment tool, the readout and the corrective method are written into the design report so routine rechecks stay repeatable.
04
Tensioner specification
Tensioner type, range and mounting specified for the asset — fixed-idler, spring-loaded or hydraulic where the duty envelope justifies it. Manual tensioning procedure written down for the crew so initial install and re-tension land on the same numbers.
Maintenance programme
What the routine looks like once we hand it back.
Four inspections written for the crew that runs the asset. The cadence lands against belt cycles and run hours, not against an arbitrary calendar.
Visual inspections
Glazing, cracking, fraying and chunk-out visible on the belt surface before any other test runs. The cheapest read in the programme and the one operators actually do, so the inspection list is written to fit on the tag.
Tension checks
Deflection or frequency-based tension check against the install tension window. Catches a slipped sheave or a stretched belt before it shows up as slip loss or burned stock.
Sheave wear measurement
Sheave groove profile measured against the original specification. A sheave worn past the wear-in limit is the most common reason a new belt never reaches rated life.
Replacement-on-condition + tensioning cadence
Replacement triggers tied to belt cycles, run hours and visible condition — not to a calendar. Tensioning cadence written down so re-tension and initial install land on the same numbers.
Bowen Basin applications
Where the programme lands on Bowen Basin fleets.
The bulk of V-belt programme engagements land on these three classes. Anything outside this list gets scoped the same way — against duty and run hours, not against the conveyor number.
Application class
Conveyor head & tail pulleys
Overland and underground conveyors with V-belt drives at the head pulley, tail pulley or intermediate drives. Belt-programme housekeeping is the most leveraged maintenance on long overland conveyors because every skipped change-out is a slip-loss day.
Application class
Crushers & screens
Jaw crushers, cone crushers, vibrating screens and grizzlies driven through V-belt configurations. Crusher drives take peak shock loads on every cycle, so the design scope has to be written against the worst case, not the average feed rate.
Application class
Slurry pumps
Slurry pumps, water pumps and process pumps on V-belt drives where the duty envelope and the contamination profile work against standard belt life. Pump drives are also the easiest place for a programme to pay back because the spares line is usually short.
Deliverable
Drive design report, tensioning schedule, recheck recommendations.
What we leave with the asset after the design review. The report sits with the RB log and the alignment chart, not in a binder somewhere.
What lands in your handover
Three deliverables, signed and filed against the asset ID.
- · Drive design report
- · Tensioning schedule
- · Maintenance interval matrix with recheck recommendations
- Drive layout & ratio
- Drive geometry, ratio and centre distance verified against the installed sheaves, with the multi-belt count and the matched-set requirement called out.
- Belt section & sheave spec
- V-belt profile and sheave specification named against the duty envelope, with the wear-in tolerance written in so the next change-out is sized against the original intent.
- Tensioning schedule
- Initial install tension, re-tension check cadence and the wear-out tension window. Readable on the asset, not buried in a binder.
- Re-check interval
- Recommended verification cadence for this specific drive, against the surrounding fleet — usually tied to a planned maintenance window or a belt-cycle count.
Questions
Common questions before the programme is scoped.
If the asset or the duty sits outside these answers, send the enquiry — we'll scope it before any kit comes off the truck.
Is a programme worth it on a single-belt conveyor?
Almost always, yes. The belt is the most leveraged spares line on the conveyor, and a one-off change-out rarely addresses the sheave wear that drove the failure. A programme is a short report at the start of a maintenance window, not a long engagement.
Do you specify the belts, the sheaves, or both?
Both, as a matched set. A belt section chosen against a worn sheave is the most common reason V-belt drives never reach rated life. The design report writes belt and sheave together so the next change-out keeps the geometry intact.
What does the maintenance interval matrix actually look like?
A short table keyed to belt cycles and run hours: visual inspection cadence, tension check cadence, sheave wear measurement cadence, and the replacement-on-condition trigger. It sits with the RB log and the alignment chart, not in a binder somewhere.
Book a V-belt drive programme review
Send the drive, the duty cycle and the change-out history.
Director Les Horn reviews every enquiry. Tell us which V-belt drive is the problem, the duty cycle and how many change-outs it has burned through — we'll come back with how we'd scope the design review against the surrounding fleet.
Speak with Les Horn
One V-belt drive at a time. Signed design report at the end.
Book a V-belt drive programme review