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backlash

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Published: 30 August 2021
Fig. 17 Backlash and root clearance More
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... lubrication, the measurement of the backlash, and the necessary factors for starting the failure analysis. Next, the article explains various gear failure causes, including wear, scuffing, Hertzian fatigue, cracking, fracture, and bending fatigue, and finally presents examples of gear and reducer failure...
Image
Published: 31 December 2017
Fig. 34 Wear of universal-joint slip spline shaft of 1141 steel. Wear was measured as backlash on a 300 mm (12 in.) radius under a torque load of 9.5 N · m (7 lb · ft). Sleeve yokes of 1140 steel were quenched and tempered to a hardness of 241 to 285 HB. Shafts were heat treated to 228 or 340 More
Image
Published: 15 January 2021
Fig. 32 Fatigue fracture of a steel bolt. Interpretation of the surface indicates that loading was primarily by unidirectional bending. However, secondary origins (C and D) indicate the possibility that a small reversed bending or backlash may have been present. Many closely spaced origins More
Image
Published: 01 January 2002
Fig. 23 Fatigue fracture of a steel bolt. Interpretation of the surface indicates that loading was primarily by unidirectional bending. However, secondary origins (C and D) indicate the possibility that a small reversed bending or backlash may have been present. Many closely spaced origins More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005288
EISBN: 978-1-62708-187-0
... by using backlash-free low-ratio gears together with a high-precision servo motor with hydraulic amplification. To achieve a mechanically backlash-free drive, backlash-free gears are used between the driving motor and the rollers that drive the strands. Slippage between the cast strand and the drive roller...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005138
EISBN: 978-1-62708-186-3
... on the diameter, pitch, torsion, and coiling point is done through preloaded ball screws, thus eliminating backlash effects. The servo motors have a very high torque-to-inertia ratio to maximize responsiveness. Fig. 3 Directional controls in a five-axis spring coiler. 1. feed; 2. diameter; 3. pitch; 4...
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002144
EISBN: 978-1-62708-188-7
..., and rack and pinion. The leadscrew drive is suitable only for short table feeds because of play in the components. A backlash eliminator is needed for climb milling when a leadscrew drive is used. Ground screws with recirculating ball nuts are used to eliminate backlash in modern machines...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006114
EISBN: 978-1-62708-175-7
... as drawing specifications. Master gear information (specification and/or data) should be included on the drawing. Tip radius detail for spur gears also is necessary. It is advisable that right-angle (rolling) fixtures be developed to check mesh and backlash. Often several inside diameter (ID) pins...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006936
EISBN: 978-1-62708-395-9
... resulting from a lack of stiffness or excessive acceleration. There can also be errors in the encoding system if the speeds or accelerations are too high. Encoders frequently record slightly different positions, depending on the direction of motion. This is commonly termed “backlash,” and it results...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004165
EISBN: 978-1-62708-184-9
... reliable corrosion tests for all corrosion-sensitive automotive systems at once. To put it frankly, a proving ground test only partly proves things. A main message is: do not push too hard or kinetic backlashes may be misleading, for example, steel corrosion becomes diffusion-blocked by amorphous rust...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006392
EISBN: 978-1-62708-192-4
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002145
EISBN: 978-1-62708-188-7
... as workpiece hardness increases, normal practice should produce an acceptable number of parts per hob sharpening. Success in hobbing gears at high hardness depends greatly on maintaining minimum backlash in the machine and on rigid mounting of both the hob and the workpiece. The ability to cut teeth in two...
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005112
EISBN: 978-1-62708-186-3
Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005153
EISBN: 978-1-62708-186-3
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005867
EISBN: 978-1-62708-167-2
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002153
EISBN: 978-1-62708-188-7
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003314
EISBN: 978-1-62708-176-4
.... The gripping system should have high lateral stiffness to maintain good alignment (more information about alignment can be found in the section “Alignment Considerations” in this article). For uniaxial, tension-compression testing, the specimen and grips must be designed such that there is no backlash while...
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002141
EISBN: 978-1-62708-188-7
... two-way grinding. In this latter system, also referred to as two-directional, the grinding is carried out during the table movements in both directions, but it requires specially designed grinders equipped with dependable backlash-eliminator devices. Some manufacturers are building thread grinders...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002188
EISBN: 978-1-62708-188-7
.... Because rubbing at the beginning of the cut is avoided by climb milling, this technique is preferred to conventional (up) milling. In addition, the downward motion of the cut assists rigidity and diminishes chatter. The disadvantage of climb milling is the need for positive control of backlash...