Silverline 282378 Externe Micrometer 25 mm

Silverline 282378 externe micrometer 25 mm

Geëmailleerd frame en satijn chroom vingerhoed en mouw. Geleverd in een sterke opbergkoffer. Bereik 0 - 25 mm. Resolutie 0,01 mm

Afwerking - Geëmailleerd lichaam/Gekarteld handvat

Vertaal alle beoordelingen naar het Nederlands

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Klantenrecensies

5 sterren		61%
4 sterren		27%
3 sterren		8%
2 sterren		2%
1 ster		2%

Hoe klantenrecensies en -beoordelingen werken

Beste recensies uit andere landen

Bester

Decent Product!

Beoordeeld in het Verenigd Koninkrijk op 12 juli 2020

I used this micrometer to measure very thin drill bits that had become mixed up, the thinnest being 0.3mm. It did require calibrating out of the box but it does includes instructions to do so and you can search on YouTube for instructional videos. Once calibrated it worked perfectly!

Tip: the top lines represent 1mm, the bottom lines represent *.5mm and rotating gives you .05mm increments. So for example a 1.85mm drill bit gets measure like this; 1mm (Top) + .5mm (Bottom) + .35and (Rotation).

12 mensen vonden dit nuttig

Mr R H

Bargain

Beoordeeld in het Verenigd Koninkrijk op 14 januari 2020

Just received this and have to say I’m quite impressed with the quality and at a great price,don’t know how they do it for the money.
I have experience using the likes of Moore and Wright,Starrett and other quality products and was expecting something far inferior which isn’t the case.
It says register for a lifetime guarantee,it just gets better.
A great buy.

6 mensen vonden dit nuttig

rich20

Great budget micrometer

Beoordeeld in het Verenigd Koninkrijk op 27 mei 2015

SUMMARY
A great budget micrometer that suited my needs fine. I usually use a set of digital calipers for most of my measurements involved in handloading ammunition for target shooting, however, in one instance I needed something which had more precision than the set of calipers I had. Hence the purchase of this micrometer. It performed great and would recommend to anyone looking for a good budget micrometer.

WHATS IN THE BOX
- Cardboard sleeve
- Plastic box
- Micrometer
- Double sided tool for zero-ing
- (No instructions, so best to read up on Wikipedia if you're unsure how to use them)

REVIEW
The micrometer has all the typical features that you would expect on any old micrometer; easy to read scale, knurled thimble, ratchet for error free measurement* and lock nut.

*Well, at least takes the human element out of it by applying the same compression on a surface

TEST RESULTS
I needed a device that would measure the external diameter of the neck of a loaded bullet, and from this dimension I can then work out how much I need to size my brass casing (to maintain neck tension) so it was critical that I have an accurate, precise measurement. Using some high quality brass cases (Lapua) I had loaded up 10 rounds also using high quality Lapua bullets. These high quality components have very repeatable measurements and should therefore provide a good test for the micrometer. Results as follows:
7.37mm, 7.39mm, 7.37mm, 7.38mm, 7.38mm,
7.38mm, 7.37mm, 7.37mm, 7.37mm, 7.38mm

Range: 7.37mm - 7.39mm = 0.02mm (0.2902"-0.2909"=0.0007")

For me, the accuracy was only required to three decimal places in inches (i.e. 0.290) but I am more than impressed with the results. I re-measured another 10 loaded rounds and found that a measurement of 7.39mm appeared only once so I'd be happy to say that this is more down to the brass thickness for that particular case, and not the tolerance of the micrometer.

The reason for this measurement was that I didn't known which part I should order to re-size the brass to give neck tension; 0.288" or 0.289", which is the reason I wanted something so accurate for measurement. This device provided that level of accuracy needed and I am most pleased with it.

I have received the re-sizing part, 0.288", and once I've fired those bullets and re-size them I will re-measure some cases as they should all have an outside neck diameter of precisely 0.288". Will update this review accordingly!

4 mensen vonden dit nuttig

Tim T.

Not great for very small measurements.

Beoordeeld in het Verenigd Koninkrijk op 31 maart 2018

Like others say, you get what you pay for. I just ordered a digital one because this has the accuracy of a fish playing darts. I measured a couple of feeler gauges, of the same brand funnily enough, and it just wasn't accurate enough so either the feelers are the wrong size or this is rubbish. I'm going with the latter, will re-measure feelers with the digital one when it arrives and update review if necessary.

4 mensen vonden dit nuttig

Kers

Accurate and repeatable

Beoordeeld in het Verenigd Koninkrijk op 6 februari 2022

Another great buy from Silverline and Prime. Ordered at 15:45 on Friday, delivered by the postman at 08:15 the next day. It's amazing that a product like this can be made, shipped, retailed, and delivered in hours, all for just over a tenner.

If you are looking at buying a 25mm micrometer, you may have noticed that the Silverline offering is the lowest price for delivery from UK. I think it is a great brand. I have bought a number of their tools over the years, and they are clearly able to source very good quality products and sell them at attractive prices.

This micrometer is perfectly fine. Barring serious damage, micrometers can't really go wrong. They have been standard workshop tools for over 150 years. Inside there is a fine thread that winds the spindle in and out, and if there is no play in the thread (which there isn't), the amount of rotation of the thimble has to be exactly proportional to the linear movement of the spindle.

The only minor issues I noticed are a slight defect in the frame casting, which doesn't affect anything, and some typos in the instructions ("Check micrometre...", "Plage de mesure 0 - 257 mm").

I noticed the claim in the instructions that the accuracy is 0.001 mm, whereas the marketing and packaging say the resolution is 0.01 mm. The resolution means that the smallest graduations on the thimble each correspond to 0.01 mm linear movement of the spindle. The level of accuracy quoted implies that when the 0.01 mark is lined up, the measured article is 0.010, not 0.011 nor 0.009, i.e. it is between 0.0095-0.0105.

This level of (in)accuracy is very tiny in everyday use. 0.001 mm is also called 1 micron. The thickess of a hair or a sheet of paper is around 100 microns; a Covid virus or the wavelength of light is about half a micron.

Nevertheless, it is possible to estimate some measurements smaller than one division on the thimble. If you have good eyesight you can estimate how far through the division the line on the barrel is. If it is half way, then the measurement is x.xx5. But it is very hard to be certain exactly what the third digit is by visually interpolating within one division. So the claim of 1 micron accuracy is perhaps not fully justified.

This got me thinking, and I made a Vernier scale on thin paper and taped it on the barrel in position 10-19, see photo. This allows a reading down to 1 micron. I then did a number of tests, randomly repeatedly measuring a number of objects of different thicknesses. I was surprised to find that the measurements were highly repeatable down to the 1 micron level. Items of "known" thickness, such as feeler gauges, measured correctly to 3 decimals. This only works when the objects are rigid with parallel faces or cylindrical, and the ratchet is operated in the same way as gives a 0.000 reading. I found that slowly clicking three times gives good results.

So there you are - it is accurate and repeatable, but you can't read the third decimal with certainty without a Vernier. Or if you care, you could buy a digital one for £40.

The measurement in the photo (out of view on the right) is 3.12 and about a half a division. The Vernier tells you it is 3.126. You can also see the slight casting blemish at the bottom.