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Hammer-in anchor W-SD with internal thread
Hammer-in anchor W-SD with internal thread

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Hammer-in anchor W-SD with internal thread

For threaded rods, threaded fittings etc., for concrete

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Available in 2 versions

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Stop bits must be used


Anchors and stop bits form a perfectly coordinated system. This system unit prevents installation errors and ensures attachment as stipulated in the approval.



  • Small drill hole depth

  • Small drill hole diameter

  • Low minimum component thickness (hmin = 80 mm)

  • Immediate load-bearing capacity – no waiting after insertion

  • Easy insertion — no installation torque

  • Anchorage via friction locking – distance-controlled expanding anchor
Proof of Performance
  • Multiple attachment of non-load-bearing systems in concrete: European Technical Approval ETA-07/0138

  • Dimensioned in accordance with the European Technical Approval Guidelines (ETAG) for "Metal Anchors for Use in Concrete", Appendix C, measurement process C

  • Fire resistance (anchoring base: concrete C20/25 to C50/60): R30, R60, R90, R120 (W-SD M6L, W-SD M8): Technical Report TR 020 "Evaluation of anchorages in concrete concerning resistance to fire" (included in ETA-07/0138)
Notice
  • The partial safety factors of the resistances regulated in the approval and a partial safety factor of the effects of yF = 1.4 have been taken into account. Please refer to the European Technical Approval Guidelines (ETAG), Appendix C, for information on combining tensile and transverse loads, edge influence and groups of anchors.

  • The partial safety factors for load-bearing capacity on exposure to fire of yM,fi = 1.0 as recommended in the approval and the partial safety factor of the effects of yF = 1.0 have been taken into account.

  • Carbide masonry drills must comply with the specifications set out in the code of practice of the German institute of building technology (DIBt) and the Association of German Tool Manufacturers (FWI) on the characteristics, requirements and tests of masonry drills with carbide cutting inserts used to drill holes for fixing anchors. Würth hammer drills meet the specifications set out in the code of practice.
Create the drill hole
Clean the drill hole
Put setting tool onto stop bit
Install anchor
Installation status