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Car Locks: Choosing a Load Rating and a Wheel for Trade Use
Most people shopping for car lock are comparing prices when they should be comparing specifications. The difference between two options in this range is usually one dimension, and that one dimension is what decides whether the item does the job or sits in a drawer.
There are 2 options here, from $8.99 at the entry level to $9.39 at the top. The spread is wide enough that the right answer is usually one specific option rather than the cheapest or the dearest.
What decides how a car lock performs
Two of the factors below matter more than the rest, but which two depends entirely on the job. Read the whole table before deciding which rows to ignore.
| Factor | What it changes | Typical choices |
|---|---|---|
| Load rating | The figure per castor, and it must cover the worst case on uneven floors. | 50 kg / 150 kg / 500 kg |
| Wheel material | Nylon rolls easily, rubber is quiet, polyurethane resists chemicals. | Nylon / rubber / polyurethane |
| Wheel diameter | Bigger wheels roll over obstructions and thresholds. | 50 mm / 100 mm / 200 mm |
| Mounting | Plate, bolt hole and stem fixings suit different frames. | Plate / bolt hole / expanding stem |
| Bearing | Plain, roller and ball bearings differ in rolling effort. | Plain / roller / ball |
Once the deciding figures are clear, the rest of the choice is about how the item is used rather than what it is. A specification that suits daily trade use is wasted on occasional domestic work, and the reverse is worse.
Wheel materials
The table below sets out the main types side by side with the compromise each one makes. Every design is a trade, and knowing the trade is what stops an expensive mistake.
| Material | Rolls | Best on |
|---|---|---|
| Nylon | Easily | Hard floors, heavy loads |
| Rubber | Quietly | Tiled and uneven floors |
| Polyurethane | Smoothly | Chemical and wash-down areas |
| Cast iron | With effort | Ovens and high temperature |
Fitting castors so the trolley tracks straight
In use, the sequence matters as much as the tool. The steps below are the ones that decide whether the result is repeatable or a one-off success.
| Step | What to do | Why |
|---|---|---|
| Check the floor | Measure the worst slope and gap | A load rating assumes a flat surface |
| Use four with two braked | Brakes on the leading pair | Stops a loaded trolley running away |
| Shim the frame | Pack the plate if the frame is uneven | A twisted frame binds every castor |
| Test loaded | Push a full load before trusting it | Problems show under weight, not on an empty frame |
Car Locks in this range
This is the item described above, listed with its current options and price.
Every option in this range
Below is the complete set of options and prices, ordered so the step between each one is visible.
| Part of the range | Price | Options | Notes |
|---|---|---|---|
| Lower half of the range | $8.99 to $8.99 | 1 options | The common sizes |
| Upper half of the range | $9.39 to $9.39 | 1 options | The larger options |
The pattern is consistent: the cheapest option does the basic job, the middle of the range adds the flexibility most buyers actually want, and the top option exists for continuous trade use.
Prices and what the money buys
Price in this range tracks specification, but not in a straight line. Between $8.99 and $9.39 the cost moves in steps, and the step that matters is the one where capability changes rather than where materials improve.
Looking after car locks
Store, clean and check. Those three habits cover nearly everything that goes wrong.
- Clear hair and swarf from the axle; that is what seizes a castor.
- Check the plate bolts for tightness monthly on a moving trolley.
- Oil only plain bushings; sealed bearings need no grease.
- Replace a flat spotted wheel rather than working around the rumble.
- Do not drag a trolley sideways; it kills the swivel race.
- Keep brakes free of paint and grit so they still hold.
Buying in quantity
Ordering more than one changes the calculation. Unit prices for larger quantities are quoted separately, and the saving usually appears once the order goes past a small multiple rather than on the second item.
For trade buyers the practical question is how many will be consumed in a year. Buying a year’s worth at once removes the cost of repeat shipping and the risk of a size going out of stock mid job.
Fitting and first use
Check the item against the listing as soon as the parcel is opened. Size, option and finish are the three things that are wrong when something is wrong, and all three are obvious in the first minute.
Read the maker’s clearance and torque figures before the first use rather than after. Nearly every early failure in a range like this is an installation problem rather than a manufacturing one.
Common mistakes
The commonest mistake is buying for the worst job rather than the usual one. A specification chosen for a task that happens twice a year is carried through every day of the other three hundred and sixty.
The second commonest is ignoring the consumables. What has to be replaced, and how often, decides the real running cost far more than the purchase price does.
What arrives with the order
Each option is supplied as a complete unit, packed for transport and despatched by the carrier selected at checkout. Options in this range are priced individually, so the packing list follows the option chosen rather than a fixed bundle.
Where an option includes a case, a set or a spare, the listing says so against that option. Anything not listed against the option is not part of it, which keeps the price comparison honest.
Frequently Asked Questions
A short set of answers to the commonest questions on Car Locks.
How do I work out a castor load rating?
Take the total weight including the load, divide by the number of castors, then add a margin of around 30 percent for uneven floors and dynamic loads.
Why does my trolley veer to one side?
Almost always a twisted frame or one castor of a different height. Check the frame with the trolley empty and on a flat floor.
Do I need braked castors on all four wheels?
Two braked castors on the steering end are usually enough, provided the floor is level.
Can I order in larger quantities?
Yes. Trade and bulk orders are welcome, and pricing for larger quantities is quoted on request rather than taken from the single unit price.
What if something arrives damaged?
Report it with photographs as soon as the parcel is opened. The returns policy covers damaged and faulty goods, and replacements are arranged from that report.
Choosing the right one
Decide the job, decide the size, then buy the option that covers it with a little in hand. That is the whole method.
The Car Locks range here covers every option listed above, with live stock and pricing.
For most buyers the practical step is to write down the two or three figures that matter, compare the option table against them, and ignore everything else on the listing.
