Jacobs arbor marking

In product Cost, I was told that Material, Labour and Overheads make up the COST, in roughly equal proportions

However, this was for a product that is expected and has to be reliable, durable but with a reasonable initial cost.

There is no point in building in quality or features that the customer neither needs, nor wants.

If you don't control costs, you will go bankrupt. (Busy Fools Ltd)

If someone is prepared to sacrifice quality, durability or reliability, those proportions can be changed.

Remember the US Naval expert on guns who rejected the proposed method of bringing together the just sub critical components of the atom bomb, because the muzzle velocity would ruin the barrel after two firings! He forgot that after the first firing, the barrel would have been vaporised!

One instance of a "bean counter" doing the wrong thing was the one who rejected a change of method giving a saving of £1.6 Million per annum. Why? 'Cos it would take 13 months to pay back!

There are many shades of grey.

Howard

At least 50, if you believe Hollywood.

To my knowledge though, no one in those movies used a Jacobs chuck (or wore proper PPE either, so might be best they weren't using workshop equipment)

Going back to the original post, there's no mention of how well the arbor works. Which is what really matters.

Note the red text in the description, here: **LINK**

https://www.ebay.co.uk/itm/JACOBS-DRILL-CHUCK-ARBOR-SPINDLE-MT2-x-6JT-NEW-FROM-THE-UK-/251657690467

MichaelG.

.

Edit: ... so we must assume that the seller is using an old stock-image.

Edited By Michael Gilligan on 26/02/2019 19:21:32

No mention right now as my lathe is presently out of action waiting for a couple of new parts....and I bought a second hand Albrecht chuck that requires this arbor....

As I mentioned earlier Jacobs have confirmed that they stopped putting their name on in 2012...so I now have no reason to doubt it’s authenticity.....but as soon as it’s up and running...I’ll be back..

That’s the seller I bought it from....He said he’s been trading for 15 years and that Jacobs stopped putting their name some time ago...which they have confirmed....I asked why he didn’t send it in the container shown in the picture...he replied that he bins them as it increases postage costs...🤔

You're forgetting how long it can maintain that initial standard and its life span generally. I could make an accurate drill arbor out of aluminium that would be true and accurate but I don't rate it's longevity.

Call me old fashioned but I like to get what I see otherwise I wouldn't necessarily choose that particular item. It's arguably false advertising.

.

Parcel Size; Parcel Weight; or ... ?

MichaelG.

.

PostScript: 'Condition = New'

New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is applicable). If the item comes direct from a manufacturer, it may be delivered in non-retail packaging, such as a plain or unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions

Edited By Michael Gilligan on 26/02/2019 20:21:36

Will you also be asking for the 1p

Does say in the conditions in Michael's link it may be delivered in plastic bag and not retail packaging.

Edited By JasonB on 26/02/2019 20:23:17

That's a large part of how well it works.

The time spent writing the original post would have covered getting out of the box, inspecting for damage and obvious low quality, then installing it and proving it.

This whole subject comes back to trust in a brand. One pays the extra specifically to avoid any uncertainties.

.

Ah but ... specifically "If the item comes straight from the manufacturer ..."

MichaelG.

en.wikipedia.org/wiki/R%C3%96HM_GmbH#Internationalization_and_extension_of_production

Rohm have a joint venture partnership with Weida in Shangdong.

They produce products available branded as Rohm or Weida:

www.weidapeacock.com/plus/view-434.html

Presumably cheaper/simpler products are not marked, and it appears Weida supply a range of generic products.

Quite possibly the arbor in question is supplied both as Rohm and made available to others via the Weida side of the venture.

Neil

Interesting. Thanks for researching it. The arbor runs true. Difficult to quantify its qualities any more than that without using it for a while. The upshot is, it's already fitted and being pressed into service.

.

Forgive my mild confusion ... it's a little early and I have not yet topped-up my caffeine level:

Which is 'the arbor in question' ?

• the 'Rohm' supplied to Chris, or
• the 'Jacobs' supplied to John,
• ... or both ?

MichaelG.

By "available to others" Neil may mean Jacobs in which case both.

.

I do realise that, Jason ...

which is why I asked Neil to clarify what he did mean by the arbor in question, rather than what he may mean.

MichaelG.

.

Edit: it may, or may not, also be relevant that this search returned no results:

http://www.weidapeacock.com/plus/search.php?typeid=10&lang=en&keyword=arbor&tj_btn.x=0&tj_btn.y=0

Edited By Michael Gilligan on 27/02/2019 07:36:32

If Chris's drill chuck arbor is a ROHM product, it came from the same place where ARC, MSC, and some others buy from, in China. As it is a cheap generic product, the factory plans a production run of a particular quantity. It is then available for ROHM, and the rest of us to draw on, off the self with generic markings without branding, until and unless there is a specific need.

Referring to Neils link, ROHM has agreements with various chuck manufacturers. Chris's drill chuck arbor was made by 'a factory' other than WEIDA.

Although I am aware of JACOBS relations in China, I am not sure about where their arbor comes from.

Ketan at ARC.

Thanks, Ketan

... it's always enlightening to have your perspective on such matters.

MichaelG.