01
Conveyor maintenance
Belt splicing and replacement, idler and pulley change-outs, tracking, structure repair and alignment. Vulcanised and mechanical splicing to 2400mm.
- Hot and cold splicing
- Pulley lagging
- Idler change-outs
- Belt tracking
Singleton NSW · Est. 2009 · Fixed plant & conveyor specialists
Shutdowns that finish
on the hour they said.
Conveyor maintenance, fixed plant shutdowns and structural fabrication for mine sites across the Hunter, Gunnedah and Bowen basins. Prequalified, ticketed crews who turn up with the gear and the paperwork already sorted.
- On the tools
- 16 yrs On the tools
- Hunter, Gunnedah, Bowen
- 3 basins Hunter, Gunnedah, Bowen
- Shutdown callout
- 24/7 Shutdown callout
- ISO 45001 Safety
- ISO 9001 Quality
- ISO 14001 Environment
- Coal Board Medicals
- Standard 11 Inducted
- $20m Public Liability
Capability statement
Everything procurement asks for, on the page
You should not have to email us for a PDF to find out whether we can do the work. Scope, tickets, insurances, workforce and commodities are all here. The formatted pack is a download if you need it for a tender file.
Download the pack (PDF, 1.2 MB)- Entity
- Greybox Mine Services Pty Ltd
- ABN
- 00 000 000 000
- Established
- 2009, Singleton NSW
- Workforce
- 48 permanent, 30 casual pool
- Commodities
- Coal, copper, gold, iron ore
- Delivery
- Shutdown, breakdown, project, labour hire
Where our hours actually go
- Conveyor and materials handling 92%
- Fixed plant shutdown execution 88%
- Structural fabrication and install 76%
- Wear liner and chute rebuilds 70%
What we do
Six things, done properly
We do not claim to do everything on a mine site. These are the six we are set up for, resourced for and get called back for.
02
Fixed plant shutdowns
Planned shutdown execution with a scoped work pack, resourced crew and an hour-by-hour schedule. We plan backwards from restart, not forwards from access.
- Shutdown planning
- Crew supply
- Critical path scheduling
- Handback reporting
03
Structural fabrication
Workshop and on-site fabrication of chutes, walkways, handrail, transfer points and support structure. AS/NZS 1554 welding, full material traceability.
- Chute work
- Access platforms
- Transfer points
- Site install
04
Wear liner and rebuilds
Chute and bin relining in ceramic, chromium carbide and UHMWPE. We measure wear rates on handback so the next change-out is scheduled, not reactive.
- Ceramic liners
- CCO overlay
- UHMWPE
- Wear monitoring
05
Breakdown response
Callout crews for unplanned failures across the Hunter and Gunnedah. Ticketed, inducted and on site while the plant is still cooling down.
- 24/7 callout
- Inducted crews
- Mobile workshop
- Temporary repair
06
Labour hire
Boilermakers, trades assistants, riggers and supervisors on short or long term hire. Coal Board medicals and Standard 11 current before they arrive.
- Boilermakers
- Riggers
- Trades assistants
- Supervisors
Recent projects
Work you can check us on
Commodity, region, scope and duration on every job. If you want a referee on any of these, ask and we will put you in touch with the person who signed the handback.
2026
Overland conveyor CV-204 rebuild
Open cut coal operation
- Thermal coal
- Hunter Valley, NSW
Full structure replacement across 380m of overland conveyor, including 42 idler frames, two drive pulleys and the head chute. Delivered inside a 14 day window with the plant handed back four hours early.
- Duration
- 14 days
- Crew
- 22 on site
- Recordables
- Nil
2025
Crusher station reline and chute rebuild
Underground metalliferous mine
- Copper
- Cobar region, NSW
Ceramic and chromium carbide reline of the primary crusher discharge chute, plus fabrication and install of a redesigned transfer point that lifted liner life from nine to twenty-two months.
- Liner life
- 9 to 22 mo
- Shutdown
- 6 days
- Recordables
- Nil
2025
Annual shutdown, mechanical scope
Coal handling preparation plant
- Metallurgical coal
- Bowen Basin, QLD
Mechanical package across the CHPP annual shutdown covering screens, chutes, conveyors and access structure. 46 work orders scoped, planned and closed out with handback documentation on the day.
- Work orders
- 46 closed
- Duration
- 11 days
- Recordables
- Nil
Safety and compliance
The gate you have to get through first
No amount of capability matters if the prequalification fails. Ours is current, and we will send the pack inside two days rather than two weeks.
- Lost time injuries, 4 years
- 0 Lost time injuries, 4 years
- TRIFR, rolling 12 months
- 0.00 TRIFR, rolling 12 months
- Crew with current Standard 11
- 100% Crew with current Standard 11
- Prequal pack turnaround
- 48 hr Prequal pack turnaround
- Documented SWMS for every scope, issued before mobilisation
- Take 5 and pre-start records available to the site owner on request
- HSE management system aligned to ISO 45001
- Coal Board medicals current for all NSW coal site personnel
- Verification of competency held for every plant item we operate
- Incident reporting into the site owner system, not just our own
Registered with Avetta, Pegasus and Cm3. If your site uses a different prequalification system, tell us which and we will be compliant in it before we mobilise.
Where we work
Basins and regions we mobilise to
Based in Singleton, resourced for the Hunter and Gunnedah, and mobilised into the Bowen Basin for shutdown work on a regular cycle.
Regions serviced: Hunter Valley, Singleton, Muswellbrook, Gunnedah Basin, Narrabri, Boggabri, Ulan, Mudgee, Cobar, Bowen Basin, Moranbah, Blackwater, Central West NSW, Lithgow.
Who you are dealing with
Started in a shed in Singleton
Greybox started in 2009 with two boilermakers, a ute and a second-hand welder, doing breakdown work for one coal operation in the Hunter. The first shutdown we ran end to end was in 2012. We have not missed a handback date since 2019.
We are still owner-operated. The person who quotes your scope is the person who walks the job, and the supervisor on site has your mobile number. There is no account manager layer between you and the crew, because on a shutdown that layer is where the hours get lost.
We are deliberately not the biggest contractor in the valley. We are resourced for six scopes and we would rather turn work down than take a job we cannot crew properly. That is the whole business model.
Questions we get asked
Before you shortlist
Are you prequalified, and how fast can you send the pack?
Yes. We are registered with Avetta, Pegasus and Cm3, hold ISO 45001, 9001 and 14001, and carry $20m public liability. The prequalification pack goes out within 48 hours of the request. If your site runs a system we are not in yet, we will complete it before mobilisation rather than asking for an exemption.
What size shutdown are you actually resourced for?
Comfortably up to about 25 on site across a two week window, which covers most CHPP and fixed plant annual shutdowns. Beyond that we would either partner or decline. We would rather turn a job down than crew it thin and miss the handback.
Do you work outside the Hunter?
Regularly. The Gunnedah Basin is a standard mobilisation for us and we run Bowen Basin shutdown work on a repeating cycle. Cobar and the Central West we cover on a project basis. Anything further afield we will quote, but we will tell you honestly if travel and accommodation make us the wrong call.
Can you handle both the fabrication and the install?
Yes, and it is usually cheaper that way. Chutes, transfer points, walkways and support structure are fabricated in our Singleton workshop with full material traceability, then installed by the same crew. Nobody is blaming the fabricator for the fit-up because it is the same team.
What does a callout cost and how fast can you get there?
Breakdown callout is charged at an hourly crew rate plus mobilisation, quoted before we roll. For the Hunter and Gunnedah we aim to be on site within four hours of the call during business hours, and within eight after hours. If we cannot make that we will tell you on the phone rather than let you wait.
Do you supply labour hire without a scope of works?
Yes. Boilermakers, riggers, trades assistants and supervisors on short or long term hire, with Coal Board medicals and Standard 11 current before they arrive on site. Rates are on the rate card in the capability pack.
Next step
Send us the scope.
We will tell you straight.
If it is a fit we will quote it properly, with a resourced schedule rather than a number. If it is not, we will say so and point you at someone who can. Prequalification pack within 48 hours either way.
- Shutdown and project enquiries
- 02 4000 0000
- Breakdown callout, 24/7
- 02 4000 0001
- tenders@greyboxmineservices.com.au
- Workshop
- Maison Dieu Road, Singleton NSW 2330