This product has been discontinued and removed from our shelves.
Self drilling anchor bolts are widely used as an efficient anchoring means, for drilling, grouting and anchoring in tunnel pre-support, slope anchor, mining, roadbed reinforcement and other projects, and they can work well in narrow space. We also provide accessories of drilling tools, like anchor bits, coupling, spherical nuts, plates, and stopper.
It's very convenient with MAXDRILL self-drilling anchor during construction, which is coupled by left- rotated international wave-shape thread.
1. Drilling: The anchor with anchor head is drilled to designed depth with carriage or jackhammer (The anchor can be elongated with coupling).
2. The drilling machine is dismantled and grouting stopper is installed in the anchor hole which is 25cm away from the orifice. In special condition of too fractured zone and high grouting pressure is needed, anchoring agent is used to seal it.
3. The end of anchor is connected with grouting pump by an adaptor.
4. Grouting will not stop until it is full enough and the pressure reaches the designed value, which is determined by design parameters and performance of grouting.
5. Plate and nut are installed according to design requirements.
|Self-drilling hollow anchor bar|
||Outer side diameter||Average Internal diameter||Effective external diameter||Aver.eff. Cross sectional area||Ultimate load capacity||Yield load capacity||Average tensile strength Rm||Average yield strength Rp0,2||Theoretical weight||Thread type|
|Anchor plate||120mm X 120mm X 6mm||150mm X 150mm X 8mm||200mm X 200mm X 10mm|
|Anchor nut||SW41 x H35||SW46 x H45||SW65 x H55|
|Coupling||D35 x L150||D41 x L160||D55 x L170||D64 x L120|
|Drill Bit||According to different condition, choose alloy, steel...Bit, custom design is available.|
|Bit with thread R25||Description||Size||Weight (kg)||Part No.||Remark|
|Cast cross bit||R25/42 mm||0.35||25MR31042||Cast cross bit for sand and gravel|
|Steel cross bit||R25/42 mm||0.30||25MR31142||Hardened cross bit for loose to medium dense conditions with small boulders.|
|R TC cross bit||R25/42 mm||0.35||25MR31242||TC cross bit for soft to medium rock formations|
|Bar R25 Length(mm)||Part No.|
|1 m long||25MR01|
|2 m long||25MR02|
|3 m long||25MR03|
|4 m long||25MR04|
|6 m long||25MR06|
|Coupler R25 Diameter (mm)||Length (mm)||Part No.|
|Nut R25 Key size(mm)||Length(mm)||Part No.|
|Spherical nut R25 Key size(mm)||Length(mm)||Weight (kg)||Part No.|
|Anchor plate R25 Dimension(mm)||Hole diameter(mm)||Weight (kg)||Part No.|
For more information, please contact us at Maxdrill Rock Tools Company, or you can download the file: self drilling anchor bolt, accessories.
(1)Diameter: R25, R32, R38, R51, T76.
(2)Maximum Tensile Load: 200-1900KN.
(3)Yield Load: 150-1500KN.
(4)Standard length: we can offer any length according to construction require.
(5)Productivity of Self Drilling Anchor Bolt: 400MT/ month
(6)Productivity of Self Drilling Anchor Bolt Accessories of drilling tool: 10000PCS/ month
Maxdrill Rock Tools Company is a China-based self drilling anchor
bolt manufacturer approved by ISO9001:2000. Our drilling tools, like
top hammer drilling tools, down the hole drilling tools and rock
anchors, and more, are manufactured with advanced production equipment
and technologies, and raw materials are thoroughly inspected to ensure
high quality. Then these drilling products have reliable quality and
If you are interested in our drilling tools, please contact us for more information at Maxdrill Rock Tools Company. We look forward to working with you.