Top Tweets for #Machiningtip
#Machiningtip 353: Although it is possible to use indexable drills for spot weld drilling, face milling in advance is recommended. Also, reduce the feed while drilling the remains of the weld material.
#hintsandtips #machining #cuttingtools
#Machiningtip 349: When bar peeling, vibration marks occur if the edge preparation variant is not properly chosen. Use S01 for very stable (rigid) systems, S02 for medium stability and S03 for the least stable conditions. #machinistlife #hintsandtips
#Machiningtip 347: Conventional milling can be beneficial where a 90 degree shoulder is required, and be more stable on older machines. However, surface finish can suffer as chips are deposited in the cutter path. Therefore, good coolant direction or air blast is recommended.
#Machiningtip 345: For bar peeling, using a screw clamping will position the insert precisely in the pocket seat and the forces will be divided in radial and axial directions. As well as an economical solution compared with claw style clamping it also helps with chip evacuation.
#Machiningtip 343: The R-geometry milling inserts operate with maximum metal removal rates and/or severe conditions. The depths of cut are generally larger as is the feed per tooth. These geometries offer a high cutting edge security. #knowledge #machining #cuttingtools
#Machiningtip 342: Tool life improves when the total indicator runout (TIR) is low. Also, you need to be more cautious with solid carbide drills than with high-speed steel. Solid carbide drills are less forgiving and tool life will reduce dramatically as run out increases.
#Machiningtip 341: In face grooving operations, spiral formed chips are the preferred choice, as they can be easily evacuated form the workpiece. A mainspring chip will create problems as it can stick in the groove between the insert and workpiece, resulting in breakage.
#Machiningtip 339: Using high pressure cooling at 70bar when drilling stainless steel can provide a considerable increase in recommended cutting speed. For workpiece materials, such as high strength titanium, it is more beneficial in terms of tool life than cutting speeds.
#Machiningtip 336: This week we take a look at parting and grooving applications. For external radial recesses the chip formation should look like a small coil or mainspring.
#machining #machinist #metalworking #cuttingtools #grooving #wednesdaywisdom
#Machiningtip 334: When using replaceable head drills, such as Hydra, pay attention to any sudden changes in sound, such as a drastic increase in noise, usually caused by uncontrolled vibration. In this case you should check the head for wear and consider changing it.
#Machiningtip 333: Compared to common turning grades, PCD (Polycrystalline diamond) tipped inserts can achieve 2-3 times higher cutting speeds. However, these should only be used for medium to fine-turning operations. Roughing with PCD tipped inserts is not recommended at all!
#Machiningtip 332: When turning cast iron, use a more wear resistant grade to reduce the effects of abrasion. Lower the cutting speed to minimize the heat load and effects of adhesion. Also, use a coated grade (mainly MT-CVD) and a more positive cutting geometry.
#Machiningtip 331: When producing a 60° thread form using a constant 0.25mm infeed per pass, the second pass removes 3 times the amount of metal as the first. With each subsequent pass, the amount of metal removed continues to grow. #metalworking #machinistlife #wednesdaywisdom
#Machiningtip 330: Fine pitch cutters can offer advantages when machining hardened or short chipping materials, which are tough and difficult to machine. Also, they can be useful in applications which have high intermittency, like engine blocks with lots of cavities and holes.
#Machiningtip 327: To produce a correct thread in hand-held applications, it is important that the downward motion of the tap into the workpiece is given a chance to follow the pitch. Otherwise the threads produced are stretched or compressed, resulting in incorrect threads.
#Machiningtip 326: Coarse pitch cutters can be useful when the application requires a longer overhang for increased reach or if machining conditions are considered heavy, with differing depths of cut. Also, if the power available is quite low.
#milling #machinistlife
#Machiningtip 324: In #Turning operations, good chip-control is achieved when the thickness is only slightly greater than the inserts' T-land, allowing the chip to flow into the groove, get curled and break in a controlled manner. #machinist #metalworking #wednesdaywisdom
#Machiningtip 323: To lessen the damaging effects of chip wedging on both forward and reverse rotation, interrupted thread taps are a solution. They reduce friction, permit better lubrication and allow more space for the passage of chips, helping to minimize the generated torque.
#Machiningtip 322: Oil on the collet chuck socket cavity can increase gripping power when using a steel or carbide tool shank. Carbide shanks generally grip slightly tighter than steel ones. If using collet chucks in combination with solid carbide cutters caution is recommended.
#Machiningtip 321: Coarse pitch cutters can offer advantages when machining soft, long chipping materials, like aluminium. They can also be useful for vibration sensitive components with thin sections.
#cuttingtools #machinist #machining #metalworking #wednesdaywisdom
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