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Our Ni&Cr or Cu&Cr chilled cast drilled roll has good hardness, long lifetime, it's well machined and durable, specially made for rubber cracker mill as per buyer's drawing provided.
Packed in plywood box suitable for sea shipment
Hardness & thickness of white layer
Item | Roll Diameter (mm) | ||||
| >250---400 | >400—500 | >500 | ||
Thickness (mm) | 3---13 | 4---20 | 4--22 | 5---24 | |
Shell hardness HS | Normal steel roll | 65---72 | |||
Alloy steel roll | 68--75 | ||||
Shaft neck Hardness HS | Normal steel roll | 26--36 | |||
Alloy steel roll | 35---48 | ||||
Tolerance on roll manufacturing
place | Diameter | length | ||
Tolerance (mm) | Max(mm) | tolerance | Max | |
shell | 3 | +/-0.5 | 10 | +/-1.0 |
Shaft neck | 5 | +/-0.5 | 10 | +/-1.0 |
Application | Test pressure(Mpa) |
Calendar | 0.60 |
Open rubber mixer | 1.25 |
Plastic | 1.60 |
Chemical composition chart of roll
Roll kind | Mark | Chemical composition |
| |||||||||
C | Si | Mn | P | S | Ni | Cr | Mo | Cu |
| |||
steel roll | LTG--P | 3.2-3.8 | 0.3-0.9 | 0.2—0.6 | <0.6 | <0.12 | -- | -- | -- | -- |
| |
0.4-1 | 0.2—0.5- | -- | -- |
| ||||||||
Alloy roll | Ni&Cr alloy |
LTG-H |
| |||||||||
-- | --- | 0.5--1 |
| |||||||||
Cu&Cr alloy |
| |||||||||||
Mo&Cr alloy | -- | 0.2-0.5 | - |
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drilled roll for rubber machinery
