Skip to main content
Log in

Geometry of kerf when curve sawing with a circular rip-saw

  • Original
  • Published:
European Journal of Wood and Wood Products Aims and scope Submit manuscript

Abstract

Rip-sawing following the curvature of a crooked log means advantages for yield. However, the possibility to saw in a narrow curve with a circular saw blade is limited because of the inherently flat geometry of circular saw blades. For a double arbour circular saw the situation is even more problematic because the two blades have a certain overlap and thus, the two arbours are not positioned in the same horizontal position. In this study, a theoretical geometrical study of the creation of a kerf with a single circular saw blade and with a double arbour circular saw with two saw blades was examined. Results for stiff saw blades show that the kerfs become in general curved and inclined (tilted) in the vertical direction and also that the width of the kerfs for double arbour saws becomes wider at the top and bottom of the cant than in the middle. Additionally, the sawn boards obtain varying thickness along their width because of the varying kerf width. A comparison with experimental thickness data from four test sawings at a sawmill indicates that the theoretical results are valid and that curve sawn boards become thinner than straight sawn boards.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9

Similar content being viewed by others

References

  • Bond B, Araman P (2008) Effect of curve sawing on lumber recovery and warp of short cherry logs containing sweep. In: Proceedings of the 16th central hardwoods forest conference, pp 105–113

  • Grönlund A (1992) Sawmill techniques part II (in Swedish). Sveriges Skogsindustriförbund, Sweden

    Google Scholar 

  • Grönlund A (2004) Wood machining (in Swedish). Trätek- Institutet för träteknisk forskning, Sweden

    Google Scholar 

  • Hamner P, White M, Araman P (2006) The effect of curve sawing two-sided cants from small-diameter hardwood sawlogs on lumber and pallet part yields. Forest Prod J 56(10):80–85

    Google Scholar 

  • Sederholm J, Söderström O (1998) The influence on the sawing method on the quality of dried lumber. TRÄTEK rapport I 8803023, Sweden

  • Yerbury M, Cooper R (2010) Curve sawing spruce sawlogs containing sweep can reduce drying distortion when compared with conventional sawing. Forest 83(4)

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Mats Ekevad.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Ekevad, M., Cristóvão, L., Grönlund, A. et al. Geometry of kerf when curve sawing with a circular rip-saw. Eur. J. Wood Prod. 72, 809–814 (2014). https://doi.org/10.1007/s00107-014-0832-6

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00107-014-0832-6

Keywords

Navigation