Effects of Pilot Hole Diameter on Screw-Driving Torques in Medium Density Fiberboard

Tor, Önder

doi:10.1590/01047760201925012608

Cited by 5 publications

(2 citation statements)

References 1 publication

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“…Matsubara et al, 20 Eckardt, 21 Steilner 11 for instance, investigated forces that appear in screwed engineered wood products. Kuang et al 22 and Tor et al 23,24 investigated the appearing screw torques in relation to applicable pilot holes and screw penetration depths in engineered wood products. Further, most fastener producers do not give maximum torque recommendations due to liability issues and those that do, do not guarantee desired results because of the variation of existing applications.…”

Section: Introductionmentioning

confidence: 99%

Study on torque and clamping forces of screw‐connected plywood

Kumpenza

Schmidt²,

Sotayo

et al. 2020

Engineering Reports

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In various engineering applications, screws are commonly used to connect wood and engineered wood products to each other. To describe the axial loads which may be transmitted with these components, it is important to quantify the resulting clamping forces in relation to the applied screw torques. In this initial study, birch plywood panels with thicknesses of t = 12, 16, and 20 mm connected with screws (major thread diameter d ≈ 5 mm) are experimentally tested to establish screw driving, tightening and stripping torques. In addition to that, the resulting clamping forces that occur over a time period of 120 hours are monitored and analyzed. A good agreement was found between the established time-dependent clamping force functions compared to the regression model, which are recommended in the literature.

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Section: Introductionmentioning

confidence: 99%

Study on torque and clamping forces of screw‐connected plywood

Kumpenza

Schmidt²,

Sotayo

et al. 2020

Engineering Reports

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“…In addition, the countersink removes the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges. Previous studies related to screw driving torques in oriented strandboard (OSB) and PB (Tor et al 2015;Yu et al, 2015), medium density fiberboard (MDF) (Tor, 2019) and wood plastic composite (Kuang et al, 2017). In these studies, the flush condition termed as SET and defined as that in which screw head was fully seated the surface of material whereas STT defined as the maximum torque after passing the SET and increasing the torque sharply.…”

Section: Introductionmentioning

confidence: 99%

Effects of Countersink Hole on Driving Torques of Screw in Joints Constructed of Medium Density Fiberboard

Tor¹

2019

Kastamonu Üniversitesi Orman Fakültesi Dergisi

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Aim of study: The aim of this study was to investigate the effect of countersink along with some other factors affecting screw driving torques in joints made of medium density fiberboard (MDF). There is limited research has been done in the field of screw driving torques in wood based composites. In all of these studies, the specimen consisted of a single wood-based composite material and metal plate which was used for the consistency of the screw driving data. However, in this study, the screw driving torques were obtained by the specimens consisted of two MDF testing blocks jointed by a screw. Material and Method: In general, there were two main screw driving torques; seating torque (SET) and stripping torque (STT). The MDF testing blocks had dimension of 150 mm long × 75 mm wide and two different thicknesses were used. For upper testing block, 8-mm-thick MDF and for lower testing block, 18mm-thick MDF were used. Torques measurements were obtained by an adjustable torque screwdriver. Factors were embedded screw orientation (face-to-face and face-to-side), pilot-hole diameter (2.5 and 3.0 mm), pilot-hole depth (12 and 16 mm) and countersink type (with and without countersink). Main results: The results of statistical analysis indicated that the four-way interaction among the embedded screw orientation, screw length, countersink type and pilot-hole diameter was significant on the mean SET and STT in the MDF joints. Highlights: This study will help MDF manufacturers to understand the screw performance of their products in terms of screw driving torques.

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Research on Medium density fiberboard (MDF) behavior against screw axial withdrawal: Impact of density and operational variables

Pour

Hatefnia²,

Dorieh³

et al. 2022

Structures

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Effects of Pilot Hole Diameter on Screw-Driving Torques in Medium Density Fiberboard

Abstract: The pilot-hole diameter needs to be chosen carefully driving screws into MDF. Too much torque applied in the MDF will cause stripping problem. The large pilot-hole diameter such as 3.2 mm needs to be preferred than the narrower ones in edge of MDF in order not to cause splitting.

Cited by 5 publications

References 1 publication

Study on torque and clamping forces of screw‐connected plywood

Study on torque and clamping forces of screw‐connected plywood

Effects of Countersink Hole on Driving Torques of Screw in Joints Constructed of Medium Density Fiberboard

Research on Medium density fiberboard (MDF) behavior against screw axial withdrawal: Impact of density and operational variables

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