And again the caliper. How good is Shahe famous here?

To the many reviews of various calipersadd one more. This has not happened yet.
For some reason, the price and the picture did not come up automatically. So the price in the store may change over time.

Under the cut a lot of photos and boring text.
It all started with the fact that I started to grievevernier caliper bought in leroi. In those early times, when they were not yet packed into an individual box with an anti-theft tag, I managed to choose one out of two dozen presented in the store that had zero vernier coincided with zero of the bar with closed lips (in fact, we managed to find such ONE of them all). The tool wore the proud name of Etalon, and was sold with a product passport, in which there was even a seal of the Quality Department and the inscription that the tool "... meets the requirements of GOST 166-89". And although my copy specifically, most likely, will be within the error of 0.1 mm, which should be provided according to GOST, I can’t say the same about the ones remaining in the store ...
In the process of infrequent operation of the caliperThe thread on the locking screw imperceptibly licked, and when trying to disassemble it and check the possibility of cutting a new one, the screw that was pressing the spring inside the moving frame stopped twisting. He also cut the thread. In general, I think it is clear that the quality of this tool could only be justified by its price. It was still possible to use it at home, but I wanted something more reliable.
Flour choice and a small market analysis



The toad, of course, resisted a little. And there were doubts whether it would be worth adding some money and buying a familiar vernier instrument from a reputable manufacturer. Yes, and reviews from this seller for this product almost was not. But then there was another sale, Ali presented a coupon 5/25 and ... well, you know how it happens
I paid for the order on August 31, the goods were sent on September 2, and after 26 days he was waiting for me at the post office.
And yes, after I was the first buyer, the seller raised the price
The parcel arrived in a regular postal envelope, wherelay a box with a tool wrapped in a pair of layers of thin packaging material (polypropylene foam?). Neither the package nor the packaging material survived to the report.
The plastic box is additionally closed on top with a cardboard cover with unmarked signs.I must say that there are no references to the manufacturer on the entire instrument. The same seller has a tool with by the given name manufacturer at the same price. But I was stopped by the yellow color of the dial. For some reason, white seemed to me more readable.
On the side of the box is the name of the instrument, the measurement range and the scale value of the dial.
On the lower part of the box is a vyshtampovka, forming a recess for storing tools.
The box is quite securely closed with plastic latches. It takes a decent effort to open them.The loops are formed by curving plastic lintels. Cheap primitive solution, with frequent use, will surely pass soon.view of the loop from the inside
Inside the box is the hero of the review itself.
In fact, he came a little wrong - the caliper itself was packed in a plastic bag together with a square of silica gel. But the package and silica gel also did not live to see the review.
Storage location is slightly larger.calipers. And in the closed state, you can hear the instrument rattle in the box, despite the restrictive stops on top. Therefore, the first thing I did was cut out the substrate for the caliper from the packaging material.This reduced the chatter a bit.
Also in the box lay a4 sheet with an English description of the possibilities, measurement methods and limits of the adjustments.From this document, in particular, it follows thatThe declared accuracy of the instrument does not depend on the price of the dial marks. The sheet is obviously common to everyone, because in the Reading Method section, there is an instruction for a dial with a division value of 0.02 mm, and I have 0.01 mm. On the dial with the price of division 0.02 mm there are two positions of zero, and for one turn of the arrow the moving frame moves by 2 millimeters. When measuring this will require additional calculations and care, I thought, but I'm too lazy. However, you will not get away from karma - just below I will tell you why you will have to be very careful when working with my caliper.
Returning to measurement accuracy - like on the sitethe seller, and in the leaflet with the description indicated that the accuracy for my device will be 0.02 mm. The truth in the detailed specifications states that this is + -0.02 mm. However, if we talk about the requirements of GOST 166-89 for calipers with a circular scale, then for the division price of 0.01mm, it does not specify accuracy, and for the division price of 0.02mm and the measured length up to 200mm, an error of + -0.03mm is required. Thus, the accuracy of the instrument stated in the instruction is within the requirements of the standard.
Continue to examine the subject:
Weight 173 grams. The shear force of the moving frame is about 200 grams. At the same time on large sizes this effort is slightly more - 220 grams, and on small ones a little less - about 190 grams. Apparently it affects several days of inactive operation with measurements of small sizes. The frame moves quite smoothly, without significant jerks.
Large, well-read dial externaldiameter 39mm. The glass, unfortunately, is plastic, judging by the sound and the scratches appearing on it. The marks on the dial are clear, readable. It is comfortable to take readings from the dial.
The inscription in Chinese praises impact resistance intwo directions (?), according to Google translator. The bottom screw allows you to set a zero if it is shot down. The screw is very tight. My adjustment was not required. It should be noted that the dial hand does not always hit zero. If you gently frame the frame, the arrow will always not reach zero a little, if it is sharp, it often slips a little, as in one of the photos above. However, the magnitude of the error is about + -0.005mm, which in my opinion is insignificant for such a tool.
Top screw (it can be seen in the following photos)Standardly serves for clamping the frame. And out of the box, he was slightly tucked, and the frame went tight. But I quickly understood why. Separate words require a roller to move the frame. This is not just a thumb rest. This roller rotates around its axis, and during rotation moves the frame, clinging to the bar. Incredibly comfortable and allows you to position the frame very accurately. The reverse side of the moving frame. All surfaces are polished and collect prints well. On my old caliper, the surface quality is noticeably lower (yes, I understand that these are tools of completely different accuracy classes with a price difference of an order of magnitude
Sponges are also polished and well kept. I tried to take a photo with backlight, it turned out so-so. But in comparison with my old tool, the conclusion can be made.
This is what a caliper from Leroy looks like.
Shahe
When moving the movable frame, the toothed rack becomes visible, which ensures the operation of the arrow of the circular indicator.The rail is fastened with three screws, screwed on the other side of the caliper. And here I waited for the first kosyachok. The slots of these screws are slandered.
And all three. It is clear that the rail must be securely fastened - fromIt depends the measurement accuracy. And it seems that when tightening the collectors tried their best :). But the licked splines are a sign of manual assembly with a violation of the pulling force. However, this should not affect the accuracy of measurements.
Plank that is in vernier calipersThe depth gauge here is screwed not into the body, but into the counter plate on the other side of the body. And the depth gauge itself is located on the outside of the device.The depth gauge has a minimum width of 2 mm, the main width is 3.2 mm and the top is covered with a thin plate (s = 0.2 mm) of figured shape, the dimensions of which, I hope, will be clear from the photo.
The plate covers the rack with a mechanism of dust. By the way, a thin layer of lubricant is visible on the rack, so this precaution is not superfluous.
At the end of the bar number of the device and the inscription "stainless steel"
The scale and the inscriptions on the bar are probablyengraved or etched. Well, this is definitely not a sticker, as I feared. This is a big plus. But a serious disadvantage is that the marks on the rod do not coincide well with the position of the moving frame. When the jaws are closed between the moving frame and the zero mark, a distance of about 1/4 millimeter remains.In practice, this leads to the fact that the sizes with fractional parts greater than 0.85 are difficult to read, because the following mark is clearly visible. In this photo, for example, the size is 2.95 although three labels are visibleand here is the size of 2.85 mm - all 3 tags are also visible.Because of this, when working with caliperswill have to be more attentive. In my opinion, such a tool will not be suitable for professional use. To make 200-300 measurements per shift and it will never be wrong to make mistakes.
Judging by the photo similar goods with branding this problem does not have.
Already in the process of writing a review, I accidentally came across a link to other manufacturer, about which I have not read anywhere else before, but which had a lot of orders and good reviews. In his photo, everything looks even better.
Carefully reviewing the caliper, I found a possible cause of inaccurate readings. Chamfer on the plate under the dial removeduneven. (This is a separate plate that fits on the moving frame from above. And the chamfer forms a kind of “cutting edge” along which the reading of the divisions takes place.) Because of this, the end of the plate was not perpendicular to its long side, but the gap between the zero risk and the plate face increased . Obviously, this is a marriage of a specific instance.
Evaluation of measurement accuracy.Unfortunately, I have nothing to carry out a beautiful accuracy test. I do not have end gauges. Therefore, I used the method already encountered here, and measured the Soviet drills of different diameters. With comments that the diameter of the shank may not correspond to the diameter of the drill. The method is indirect, the evaluation is subjective. But for home use is enough for me. Results below.
2.5mm
3mm
3.5mm
5mm
I remind you that for circular calipersThere are no requirements with an indicator with a 0.01mm division price in GOST 166-89. Therefore, it is difficult to talk about compliance with any standard. But the accuracy of + -0.03 mm (which GOST regulates for a 0.02 mm graduation price) was achieved, in my opinion.
Total conclusions: Pros:
  • High-quality surface treatment.
  • Good mixing sponges.
  • Very comfortable to read readings compared to the nonius.
  • Separate box for the tool.
  • By indirect estimates, the accuracy is good.
  • The roller stop allows you to easily and accurately position the frame.

Minuses

  • Plucked bolt vents produce a manual assembly with abnormalities.
  • Error in the manufacture of chamfer says mediocre quality control at work.
  • Dimensions with fractional values ​​greater than 0.85 may be removed with an error. (marriage of a specific instance) Care is required when working.
  • Tool box without separate loops and soft lining.
  • Plastic convex glass quickly scratches and becomes cloudy in the center of the dial.

In my impression, the tool corresponds to its price and is below professional - with a good level of manufacturing of individual parts, the manufacturer lacks a little quality control.
Thus, the miracle did not happen. Buying a serious tool in China is still a lottery.