A pleasant surprise from Aliexpress

[mikey553]

Aliexpress is currently selling ER32 collet chucks with a short square or hex body. I thought it may be good for some quick setups and ordered both for $43 delivered. They came in less than 2 weeks, nice packing and no shipping damages. But when I opened the boxes I became upset. They did not even bother to grind the hex or square body. As you can imagine the part in a collet would have runout in relation to the body. In may case it was .0045" and .010" near the collet in the square and hex chucks. These are actually good numbers for the unground chucks. Both chuck bodies were heat treated, but only to around 23 HRC. The threads and collet taper were machined after heat treatment, the taper was ground.

I contacted the seller and let them know I am not happy. As usual they requested pictures and videos, so I started the dispute on Aliexpress and attached a few pictures. This is the first time I complained to a product quality there. I had a couple of cases before where I never received a product and I got refunded from Aliexpress. Within 15 minutes of my filing I've got an email from Aliexpress to let me know that the dispute was resolved in my favor and I will get a full refund. A minute later I also received an email from Paypal informing me I've got a refund.

For those who don't know Aliexpress is a Chinese version of Amazon. They assist independent sellers in their sales. Aliexpress holds the money paid for about 15 days before releasing it to the seller. In my case the seller never received any money from me. I would call it a good customer service and would continue buying from them. Their prices are very good. The quality varies, but in many cases you can get satisfaction.

[JRouche]

Aliexpress is currently selling ER32 collet chucks with a short square or hex body. I thought it may be good for some quick setups and ordered both for $43 delivered.

For those who don't know Aliexpress is a Chinese version of Amazon. They assist independent sellers in their sales. Aliexpress holds the money paid for about 15 days before releasing it to the seller. In my case the seller never received any money from me. I would call it a good customer service and would continue buying from them. Their prices are very good.

Thats cool. I just started buying stuff from them, so fail, errr, so far so good I like the idea for the collet blocks, kinda like what many of us have for the 5c right? Will you reorder the blocks? Thanks, JR

[old mart]

The square and hex look like they are simple extrusions, not machined at all, so your runouts are expected.

[Noitoen]

You can get them at Amazon

https://a.co/d/bAmUQPy

[MrWhoopee]

I've purchased a lot of tooling off Aliexpress. Never a problem.

[RB211]

For this to be sold in the condition received shows a record high level of ignorance to the required features of such a device. It convinces you to just make these yourself rather than trust an imbecile 6,000 miles away to do it correctly.

[tomato coupe]

You ordered something and it turned out to be crap, so shouldn't this thread be titled "An unpleasant surprise from Aliexpress"?

[MrWhoopee]

You can get them at Amazon

https://a.co/d/bAmUQPy

• Accuracy: Flatness, parallelism and sureness within 0.0005-inch.

🤣🤣🤣

[Bob Engelhardt]

• Accuracy: Flatness, parallelism and sureness within 0.0005-inch.

🤣🤣🤣

What is "sureness"?

Also: "Usually ships within 1 to 2 months". So faster & cheaper from AliExpress

[JRouche]

What is "sureness"?

Also: "Usually ships within 1 to 2 months". So faster & cheaper from AliExpress

The sureness is in the fact you can be well assured they are lying. JR

[mikey553]

Thats cool. I just started buying stuff from them, so fail, errr, so far so good I like the idea for the collet blocks, kinda like what many of us have for the 5c right? Will you reorder the blocks? Thanks, JR

I will not reorder the chucks. The hex and square are not machined, they look like a cold rolled or extruded material to me. Most likely the majority of the chucks on the market are in the same condition. A few may be ground, but that would be an exception. I may be able to finish mine by grinding when my surface grinder is up and ready.

What is interesting - the treads are turned (most likely on CNC lathe) and the ER taper is ground after "heat treatment". Could these 2 features be done on the same machine in one setup? If not and threads and taper were done separately, it is 100% junk. I have never heard about CNC lathe with internal grinding capability, but what do I know? I am not even sure how to check the ER taper concentricity to threads. Any ideas?

When I said I had a pleasant surprise, I meant the Ali customer service, which was a top notch.

[JRouche]

I will not reorder the chucks. The hex and square are not machined, they look like a cold rolled or extruded material to me. Most likely the majority of the chucks on the market are in the same condition. A few may be ground, but that would be an exception. I may be able to finish mine by grinding when my surface grinder is up and ready.

When I said I had a pleasant surprise, I meant the Ali customer service, which was a top notch.

Oh Man! I didnt open the pics up the first time. Those things missed the OD the grinding shop. No really, they look like they are ready for final finishing. The grinder. Could it be a mistake, an oversight? Either way, a lil odd.. And yeah, it was the C/S of Ali that I thought you were talking about. I have had very good communication with them. JR

[mattthemuppet]

I bought a pair of John Stevenson's blocks from arceurotrade and have been very pleased with them. Couldn't tell you the TIR as I've not needed to know it yet, but they're beautiful finished and a very reasonable price

[Paul Alciatore]

So you would leave the grinding of the external faces for the last step? Can you explain why?

I would expect that it would be before the bore for the collets was made.

Oh Man! I didnt open the pics up the first time. Those things missed the OD the grinding shop. No really, they look like they are ready for final finishing. The grinder. Could it be a mistake, an oversight? Either way, a lil odd.. And yeah, it was the C/S of Ali that I thought you were talking about. I have had very good communication with them. JR

[J Tiers]

So you would leave the grinding of the external faces for the last step? Can you explain why?

I would expect that it would be before the bore for the collets was made.

Because you can locate from the bore and get it dead-on.

Yes, you can do similar from the flats, but it is easy to locate from a bore using an accurate mandrel in production.