Feedback reaches us at three points: after drawing confirmation, after the parts have been running for one service interval, and when a drawing or material issue needs a joint decision. We keep the technical content and remove identification, because several of the plants involved supply competitive markets and prefer not to be named in public material. Each entry on this page therefore carries three attributes only — job function, industry, and region — and nothing that would identify a company, person, certificate number or order.

• Attribution is limited to role, industry and region, for example maintenance engineer, steel plant, Southeast Asia.
• Numbers are reported as stated by the user and kept in ranges or approximated values. They describe one installation, not a guaranteed performance level.
• Difficult cases are kept. Two of the notes below describe situations where the initial recommendation was revised or a part had to be reworked.
• Nothing is bought or exchanged. No discounts, credits or future-order conditions were attached to publishing a note.

The summaries below condense repeated themes from recorded feedback. Where a value is given, it describes the installation as reported, with the operating conditions stated next to it so the figure can be put in context.

Reported duty	Source attribution	What was reported	How it was checked
Oscillating joint, high load, dust	Maintenance engineer, quarrying equipment, South America	Greasing interval removed; inspection at roughly one year showed measurable but even wear on the bore	Wear readings taken at scheduled overhaul; dimension report from the plant
Bushings around 200–400 mm (8–16 in) bore, low speed	Workshop supervisor, repair yard, Southeast Asia	Parts machined to a sample instead of a drawing fitted on the first attempt	Sample measured, reverse drawing sent for approval before machining
Seawater service, slewing and winch duties	Procurement lead, marine deck equipment, Northern Europe	Nickel aluminium bronze specified instead of the original grade; no corrosion pitting at the first dock inspection	Material certificate EN 10204 3.1 supplied; dock inspection report
Dry-running guide positions in packaging machines	Design engineer, packaging machinery OEM, Central Europe	Prototype batch of roughly twenty pieces delivered inside four weeks from drawing approval	Drawing approval date versus delivery date in the order file
Arm and bucket pins, shock loading	Fleet maintenance planner, contractor, Middle East	Pin bushings lasted through one full season compared with two changes per season previously	Workshop job cards for pin replacement
High temperature near continuous casting	Maintenance engineer, steel plant, South Asia	Original aluminium bronze proposal withdrawn once shaft hardness was confirmed below 200 HB; leaded tin bronze supplied instead	Shaft hardness certificate sent by the plant; revised material proposal

Selected notes in detail

How to check whether a testimonial is credible

Supplier feedback pages are easy to write and hard to verify. The following checks separate usable evidence from marketing text, and they work on any vendor’s page, including this one.

Check	What to look for	Why it matters
Operating conditions stated	Load, speed or oscillation angle, temperature, medium, shaft hardness	Service life means nothing without duty; any figure without duty is unusable for your design
Comparison basis named	What the previous part was, and how long it lasted	“Twice the life” needs a stated reference; doubling a two-week life is not an improvement worth paying for
Failure mode described	Wear, scoring, corrosion, seizure — not just “worked well”	Suppliers who state failure modes have actually inspected used parts
Measurement rather than impression	Dimension reports, hardness values, inspection intervals	Opinions do not survive audit; measurements do
Document trail	Material certificate, dimensional report, drawing approval date	These are the documents a plant can file and re-check later
Negative cases present	At least one example of a revised recommendation or a rework	A page with only successes is usually edited rather than complete
Anonymisation explained	A stated reason for withholding names	Unexplained anonymity is weaker than a documented policy

Independent verification is possible. Send the conditions relevant to your plant and ask for a trial quantity: it converts claims into your own measurement. Quality inspection and life evaluation describes which properties are checked and how the results are recorded.

From enquiry to first delivery

Most of the friction in custom bushing supply happens in the first two stages. The sequence below shows where time is spent and what each stage requires from you.

Stage	What happens	What we need from you	Typical duration
1. Technical enquiry	Review of duty and geometry; questions back if data are missing	Drawing or sample dimensions, load, movement, temperature, medium, quantity	Reply usually within one to two working days
2. Drawing confirmation	Reverse drawing prepared from a sample, or your drawing checked for machinability and tolerance	Written approval, including any changed tolerance or alloy note	One round, occasionally two
3. Casting and machining	Centrifugal or continuous cast blank, then CNC turning to drawing	Release for production	Commonly three to five weeks depending on size and quantity
4. Inspection	Dimensional report, hardness check, material certificate	Specification of required documentation	Within the machining schedule
5. Shipment and follow-up	Packing per line item, then a follow-up question after one service interval	Feedback on how the parts ran	—

Two items slow orders more than anything else: missing shaft data and unspecified documentation. If the shaft hardness, surface finish and the required certificate level are included in the first enquiry, the quoting round usually finishes in one pass. An overview of the route from melt to finished part is given on raw material to finished machined bronze, and standard tolerance practice is summarised under bearing specification.

What this page does not tell you

• No guaranteed service life. The figures quoted above come from individual installations. Your result depends on load, alignment, shaft condition and contamination, none of which transfer directly.
• No named references. We do not publish customer company names, and we do not pass contact details to third parties, including prospective buyers.
• No numbers invented for this page. Where a recorded note lacked detail, it was shortened or left out rather than filled in.
• Feedback is not a substitute for calculation. For duty comparisons, the comparison between oilless and lubricated bushes gives the decision criteria; applications by industry gives context by sector. Where impact loading dominates, the notes under mining and mineral machinery describe the duty in more detail.

Frequently asked questions

Can you put me in touch with a previous customer?

No. Plants that appear here did so on condition that neither company nor contact names are published or shared. What we can do instead is supply a trial quantity against your drawing so you generate your own data, including a dimensional report and a material certificate for the batch.

Are the service-life figures on this page typical?

They are individual results reported by users, retained with the operating conditions next to them. Treat them as evidence that a duty was achievable, not as a promise. For your own case we will state what we expect in writing, together with the assumptions about load, shaft hardness and lubrication.

What happens if the parts do not fit?

Send the measurement, ideally with a photo of the housing or shaft. If the deviation comes from our machining, the parts are remade; if it traces back to the drawing approval, we look at the approval record together before deciding. Several of the drawings we receive are reverse drawings from samples, so we expect occasional corrections.

Can I submit feedback after installing the parts?

Yes, and it is most useful after one service interval, when there is a measurement to report. State the duty, installation and removal dates, wear readings and what the previous part did in the same position. It is published in the anonymous format used above, or kept internal if you prefer.

Do you publish negative feedback?

Yes, in the same anonymised form. One entry above records a recommendation we reversed after receiving shaft data, and the rework cases are what lead to changes in our drawing check.