ISO 2768 Standard for Machining Tolerance

Today we will introduce the standards used for steel castings.

We found that many drawings or required documents require ISO 2768 as a processing standard. We looked up a lot of copywriting on the Internet. Fortunately, we found some free and available standard documents. Please check the attachment, it is an ISO 2768 standard document.

We believe that the standard document can only show us approximate tolerance requirements. For critical dimensions, you should clearly indicate on the drawing. In addition, for some dimensions that do not need to be very strict, you should also specify. This may reduce the supplier’s defective rate. As a result, your supplier will not demand more costs because of its high defective rate. This will benefit both customers and suppliers. All in all, this standard is only used for general tolerances in machining. You should not make it an absolute requirement for every size.

ISO 2768 – 1

DKDEUK
fFinFeinFine
mMiddelMittelMedium
g/cGrovGrobCoarse
vMeget grovSehr grobVery coarse

Length       

-3-6-30-120-400-1000-2000-4000
f± 0,05± 0,05± 0,1± 0,15± 0,2± 0,3± 0,5
m± 0,1± 0,1± 0,2± 0,3± 0,5± 0,8± 1,2± 2
g/c± 0,2± 0,3± 0,5± 0,8± 1,2± 2± 3± 4
v± 0,5± 1± 1,5± 2,5± 4± 6± 8

Angle                      

-10-50-120-400400-
f± 1°± 30′± 20′± 10′± 5′
m
c± 1° 30′± 1°± 30′± 15′± 10′
v± 3°± 2°± 1°± 30′± 20′

Fillets and chamfers                      

-3-66-
f± 0,2± 0,5± 1
m
c± 0,4± 1± 2
v

Plainness                  

-10-30-100-300-1000-3000
H0,020,050,10,20,30,4
K0,050,10,20,40,60,8
L0,10,20,40,81,21,6

Rectangular angle measure               

-100-300-1000-3000
H0,20,30,40,5
K0,40,60,81
L0,611,52

Symmetry                

-100-300-1000-3000
H0,5
K0,60,81
L0,611,52

Symmetry                      

H0,1
K0,2
L0,5

Yide Casting is a casting trade company, belongs to JM casting manufacturer. our casting foundry is known for top-quality grey iron casting, ductile iron cast and brass casting products at our local place, and cooperate with so many trade company to sell our casting iron parts, we always marked “JM” on the iron cast part, and want to show our quality excellent iron cast parts to the world, we build Yide casting trade company for our iron foundry, we provide both casting and machining service for our customers, and also cooperate with other strong ability steel casting foundry, we want to provide best cast iron products to our customers, and reduce the casting problems for our customer only once, we also provide OEM and ODM service, if you are looking for “JM” casting products, or you are looking for casting iron factory, please don’t hesitate to contact us, send us your drawing file and we will make a sample according to your parameters as soon as possible.