|Place of Origin:||Mainland China|
|Minimum Order Quantity:||100 pcs|
|Packaging Details:||Wooden Case|
|Delivery Time:||30 days|
|Payment Terms:||T/T, L/C|
|Supply Ability:||80,000 pcs monthly|
Underground Mining Roof Support & Mining Roof Bolting Expansion Shell Rock Bolt Anchor
Expansion shells hold in any rock strata which is sufficiently competent to provide an adequate anchorage.
They are designed to anchor in soft ground or hard rock.
In good strata the anchorage exceeds the ultimate strength of the steel bolt.
All expansion shells require a competent strata in the anchor zone.
The suitability of the anchorage and the specific expansion shell to be used is best determined by physical load testing.
|Product Name||Rock Bolt with Expansion Shell|
|Type (Size)||32mm, 35mm, 38mm, 42mm, 48mm|
How long can I expect to get the customized sample?
After you pay the sample charge and send us confirmed files, and the mould is existing in our factory, the samples will be ready in 10-15 working days;
If the mould is not existing, we need to open a new mould, the samples will be ready in 15-18 working days; The samples will be sent to you via express and arrive in 3-5 working days. You can use your own express account number or prepay us if you do not have an account.
What about the lead time for mass production?
Honestly, it largely depends on the order quantity and the season when you place the order. As usual, 20-35 working days will be OK. If you are very urgent, we will try our best to do it.