Bahco 400MM 14 TPI Sandflex Bi-Metal Power Hacksaw Blade 3809-400-32-1.60-14

Suitable for use on any material. Sandflex(R) is virtually an unbreakable bi-metal hacksaw blade. Shatterproof blade that can withstand high feed pressures yet giving accurate, fast cutting rates. Sandflex(R) blades are safer to use in all circumstances, especially on old machines or with unskilled operators. Correct blade tension is essential for ensuring a straight kerf and a long useful life of the blade. If the tension is too low, the blade will bend upwards or twist, giving rise to high stresses, heavy wear of the blade and uneven, crooked kerfs. Excessive tension causes high stresses in the blade and saw frame. As a general rule, harder materials call for a lower stroke rate and higher feed pressure. If the chips are burnt, feed pressure is too high. If tooth cracks appear, feed pressure is too high. Fine, powdery chips indicate that feed pressure is too low. Fine curled chips indicate the optimal feed pressure. The teeth should not be touching the workpiece when the machine is started. A useful rule of thumb is that at least three teeth should be engaged at any time.