Banggood

Great product and good price. I'm very satisfied. The sizes are ideal for small lathes, milling machines or CNC machines. Ideal product for those who delight in mechanics. I recommend it. Great product and good price. I am very satisfied. The sizes are ideal for small lathes, mills or CNCs. Ideal product for those who dabble in mechanics. I recommend it.

Its really good and well squared, i really find it useful and exact, only problem is the thread are withworth and holes are slightly unaligned. Here is my review video on my youtube channel. https://www.youtube.com/watch?v=ZXbgIgVksgM

Looks great, well oiled. Exactly 25-50-75. Very pleased.

Arrived fast... very nice!

Blocchi 25x50x75 I blocchi arrivano a coppie, singolarmente protetti con carta oleata, imbustati un sacchetto di plastica e confezionati scatola di cartone in una scatola di cartoncino. Il tutto era protetto con un generoso strato di materiale espanso. I blocchetti che ho ricevuto presentano filettature M10, ma i fori passanti sono da 8.5 mm di diametro. In pratica forano tutto con il diametro di preforatura per la filettatura M10 e non allargano i fori passanti a 10.5 mm. Per assemblare i blocchetti ovviamente non si possono usare viti M10 normali perché non passano da fori da 8.5, comunque ci sono due strade possibili , o si costruiscono dei tiranti con la prima parte filettata M10 da avvitare nel blocchetto e la restante ridotta a 8 mm e filettata M8 da infilare nei fori passanti e fissare con dado flangiato, o si mettono nei fori filettati delle bussole di riduzione con filetto esterno M10 ed interno M8 e si usano dei bulloni M8. Le superfici esterne blocchetti sono rettificate

External dimensions good and metric tick... Then it gets a little more interesting. All the unthreaded holes are about 9 mm. the threads are imperial as others have noted. On the largest surface the holes are a different pitch one way than the other (the long way is 14.05mm the short way 14.95). Between centres from edge to edge is 2.2” which would make sense for 7/32s pitch but the other way is 14.95m (nothing imperial). Only 5 holes are threaded all on the largest surface all the way through to the other side. I have no way of checking for parallel. All this said they will may a valuable addition to any workshop. They would be slightly better value if they were hard metric.

Bloki przychodzą owinięte w jakiś cienki drący się papier, nasączony smarem, którym są one zabezpieczone przed korozją. Powierzchnie są bardzo precyzyjnie wyszlifowane, gładkie i proste. Kąty proste są dość precyzyjne, i uważam, że wystarczające. W najniekorzystniejszym ustawieniu, można włożyć z jednej strony papierek 0,04mm, czyli wychodzi, że na 75mm jeden ma zbieżność 0,02mm.

Tym razem troszkę gorzej. Poprzednio kupiłem jeden komplet, i bloki są idealne. Tym razem jednak, jeden ma odchyłkę 0,02mm na wymiarze 50mm, pozostałe boki są idealne. Ogólnie sądzę, że taka dokładność jest na większości amatorskich maszyn, i tak wystarczająca. Jedna uwaga do producenta, szkoda że niegwintowane otwory nie mają średnicy 10mm, można by wtedy bezproblemowo łączyć je śrubami.

2 en 1 !!! dos bloques que pudieron superar el delicado trato de Correos. Una vez limpios del kilo de grasa que tienen para su protección se pueden observar los agujeros roscados.

Delayed delivery probably caused by covid lock down. The blocks where very square and of excellent quality. The only problem being that Bangood sent me 1" x 2" x 3" blocks despite the box they came in being marked as 25-50-75mm. Bangood offered to discount the sale and give me some points which I agreed to. I already owned a set of 1-2-3 blocks and specifically needed metric, so it looks like I am going to end up with three sets. I don't mind too much. I use them constantly including with woodwork. The entire complaint process took about 36 hours which I thought was excellent. It might have been even quicker if I had initially provided the SKU number and a photo of the label.