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Description
na4928 inaTechnische Basisdaten Hersteller: INA Synonym: 0506616980000 NA4928 Bezugsdrehzahl: 7. 400 1 min Gewicht: 4150 Gramm Grenzdrehzahl: 13. 600 1 min Herstellungsland: Deutschland Lubrikation: Umfangsnut Schmiernut vorhanden(en) Zolltarifnummer: 8482 4000 Erweiterte technische Daten ueres Breitenmae: mm 190,00 Begrenzungsdrehzahl (n G) "2900. 0000" Begrenzungsdrehzahl fr SchmierstoffLubrikation: (n G Fett) "1740. 0000" ueres Breitenmae:(B) mm 50,00 ueres
Technische Basisdaten
| Hersteller: INA |
| Synonym: 0506616980000 NA4928 |
| Bezugsdrehzahl: 7.400 1/min |
| Gewicht: 4150 Gramm |
| Grenzdrehzahl: 13.600 1/min |
| Herstellungsland: Deutschland |
| Lubrikation: Umfangsnut Schmiernut vorhanden(en) |
| Zolltarifnummer: 8482 4000 |
Erweiterte technische Daten
| Äußeres Breitenmaße: mm 190,00 |
| Begrenzungsdrehzahl (n G) "2900.0000" |
| Begrenzungsdrehzahl für SchmierstoffLubrikation: (n G Fett) "1740.0000" |
| Äußeres Breitenmaße:(B) mm 50,00 |
| Äußeres Breitenmaße:(b) mm 50,00 |
| ECLASS number 23-05-09-07 |
| ECLASS2 number 23-05-09-07 |
| Einzelgewicht in (kg): 4.15 |
| Innenmaße: mm 140,00 |
| Radial Dynamic Load Rating Cr (N) 237000 |
| Radial Static Load Rating C0r (N) 500000 |
| Referenzdrehzahl (n ϑr) "1860.0000" |
| XL X-Life |
| Betriebstemperatur max.: 120 °C |
| Betriebstemperatur min.: -30 °C |
| C 0r 500.000 N Statische Tragzahl, radial |
| C r 237.000 N Dynamische Tragzahl, radial |
| C ur 79.000 N Ermüdungsgrenzbelastung, radial |
| Dynamische Tragzahl, radial: 27.500 N |
| Ermüdungsgrenzbelastung, radial: 6.200 N |
| Minimaler Kantenabstand: 0,3 mm |
| Statische Tragzahl, radial: 33.500 N |
| T max 120 °C Betriebstemperatur max. |
| T min -30 °C Betriebstemperatur min. |
| axialer Verschiebeweg: 0,8 mm |
| n G 2.900 1/min Grenzdrehzahl |
| n ϑr 1.860 1/min Bezugsdrehzahl |
| r min 1,5 mm Minimaler Kantenabstand |
| s 1,5 mm axialer Verschiebeweg |
| ≈m 4,15 kg Einzelgewicht |
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4.2 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 1
Very very poor quality
Color: E Gold Black
Very poor quality. Looks like kid toy’s
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Reviewed in the United States on March 24, 2026
★★★★★ 5
Awesome piece of jewelry
Color: E Balck Silver, Color: E Balck Silver
Very impressive watch, Very clean loom, the black goes well with everything. Very stylish & makes every outfit better. It’s affordable is the cherry on top 😊
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Reviewed in the United States on November 6, 2025
★★★★★ 4
I (still) like it
Color: B Black
Looks solid, considering it is lightweight plastic. Very large. I have a large wrist and still I needed to remove 3 links. Link removal took a while to figure out. Needed the video (QR code in box), a bright light and magnifying glasses (to see the inside arrows and tiny pins). It seems to keep good time, though the hands are slightly off -- for example, at 3 o'clock, the hour hand is a bit after 3, not right on 3. At 6:15, it seems it will be 7 very soon. Maybe it will make me early for a change LOL. Mostly I just really need a watch to tell the time, without having to pull out my phone. This does the job, with a bit of style and a touch of irony.
Update, after 5 months of daily use: The watch still looks good and the timepiece still functions. Sadly, a small piece of plastic broke off the watch band, where the pin connects, so the band will not stay together. It is a larger piece of the band, near the dial, so there are not extra links of that size to repair it. There does not appear to be a warranty. Up to this point, I have received several compliments on the watch. I agree that the contrast is rather eye-catching. I may buy a second one and use the first watch for parts.
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Reviewed in the United States on October 11, 2025
★★★★★ 3
Cheap dial
Color: E Gold Black
As a whole it's a quartz plastic watch for under $20...I'm disappointed in the poor looking dial quality. The case seems fine for a plastic watch, it's no Swatch but not a bad case. Shame the dial looks so cheap, it may have passed at a glance as a nice watch otherwise.
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Reviewed in the United States on June 6, 2026
★★★★★ 2
NOT WORTH IT
Color: E All Black
Not worth the money in my opinion. Very light weight. Almost like wearing a child's watch. Cheaply made.
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Reviewed in the United States on April 3, 2026