A slotting machine works on the same principle as an ordinary shaper except that the ram which carries the tool moves in the vertical direction at right angles to the work piece. Slotters are commonly used for internal machining of blind holes, key ways, recesses and also for the cutting of internal and external teeth on large gears.
A T-nut, T nut, or tee nut (also known as a blind nut,[1] which can however also refer to a rivet nut or an insert nut, and likewise drive-in nut[2]) is a type of nut used to fasten a wood, particle or composite materials workpiece, leaving a flush surface.
It has a long, thin body and a flange at one end, resembling a T in profile. The flanges of T-nuts often have hooks or serrations on the prongs that dig into a wooden work piece as the bolt is tightened from the opposite side of the piece, providing better retention.
In 1969, the first four-prong T-nut with an eight-sided base was patented. Unlike standard round base T-nuts, eight-sided T-nuts can be fed efficiently and reliably via machine. The eight-sided T-nut base has become the standard configuration for T-nuts inserted by machine.[3][4][5]
See also[edit]
- T-slot nuts, which are used in work-holding in machine tools. T-slot nuts fit in T-section slots in the machine work-table and are used in conjunction with studs and clamps to provide flexible means of holding workpieces in place.
- Weld nuts, which are similar in appearance to t-nuts. They lack the prongs which penetrate into wood. Weld nuts are usually spot-welded into place on metal.
References[edit]
| Wikimedia Commons has media related to Tee nuts. |
- ^Airfield Models - Threaded Fasteners used in Model Airplanes
- ^4 PRONG DRIVE IN NUT FOR WOOD (T-NUT) ZINC PLATED Kays Fasteners, accessed 2019-09-09.
- ^US 3480061, Leistner, Walter Hermann, 'Fastener member', issued 1969-11-25.
- ^Our history, archived from the original on 2009-01-05, retrieved 2009-10-21.
- ^About Sigma, retrieved 2009-10-21.
Here you can download the free lecture Notes of Machine Tools Pdf Notes – MT Notes Pdf materials with multiple file links to download. Machine Tools Pdf Notes – MT Notes Pdf book starts with the topic
The Machine Tools Pdf Notes – MT Notes Pdf
Machine Tools notes pdf – MT pdf notes – MT notes pdf file to download are listed below please check it –
Machine Tools Notes Book
Complete Notes
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Unit 1
Link – Unit 1
Unit 2
Link – Unit 2
Unit 3
link – Unit 3
Unit 4
Link Unit 4
Unit 5
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Unit 6
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Unit 7
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Unit 8
Link – Unit 8
Note :- These notes are according to the R09 Syllabus book of JNTU.In R13 and R15,8-units of R09 syllabus are combined into 5-units in R13 and R15 syllabus. If you have any doubts please refer to the JNTU Syllabus Book.
Machine Tools Notes pdf Details
UNIT – I
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Elementary treatement of metal cutting theory – Element of cutting process – Geometry of single point tool and angles chip formation and types of chips – built up edge and its effects chip breakers. Mechanics of orthogonal cutting –Merchant’s Force diagram, cutting forces – cutting speeds, feed, depth of cut, tool life, coolants, machinability – Tool materials. Kinematic schemes of machine tools – Constructional features of speed gear box and feed gear box.
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UNIT – II
Engine lathe – Principle of working, specification of lathe – types of lathe – work holders tool holders – Box tools Taper turning thread turning – for Lathes and attachments.
Turret and capstan lathes – collect chucks – other work holders – tool holding devices – box and tool layout. Principal features of automatic lathes – classification – Single spindle and multi-spindle automatic lathes – tool layout and cam design.
UNIT – III
Shaping slotting and planing machines – Principles of working – Principal parts – specification classification, operations performed. Kinematic scheme of the shaping slotting and planning machines, machining time calculations.
UNIT – IV
Drilling and Boring Machines – Principles of working, specifications, types, operations performed – tool holding devices – twist drill – Boring machines – Fine boring machines – Jig Boring machine. Deep hole drilling machine. Kinematics scheme of the drilling and boring machines
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Machine Tools Notes Pdf – MT Pdf Notes
UNIT – V
Milling machine – Principles of working – specifications – classifications of milling machines – Principal features of horizontal, vertical and universal milling machines – machining operations Types geometry of milling cutters – milling cutters – methods of indexing – Accessories to milling machines, kinematic scheme of milling cutters – milling cutters – methods of indexing.
UNIT –VI
Grinding machine – Fundamentals – Theory of grinding – classification of grinding machine – cylindrical and surface grinding machine – Tool and cutter grinding machine – special types of grinding machines – Different types of abrasives – bonds specification of a grinding wheel and selection of a grinding wheel Kinematic scheme of grinding machines.
UNIT – VII
Lapping, honing and broaching machines – comparison to grinding – lapping and honing. Kinematics scheme of Lapping, Honing and Broaching machines. Constructional features of speed and feed Units, machining time calculations
UNIT – VIII
Principles of design of Jigs and fixtures and uses. Classification of Jigs & Fixtures – Principles of location and clamping – Types of clamping & work holding devices. Typical examples of jigs and fixtures.
Lathe Slotting Tool
Reference –Machine Tools – MT notes pdf – MT pdf notes – MT Pdf – MT Notes
1. Machine Tools – C.Elanchezhian and M. Vijayan / Anuradha Agencies Publishers.
2. Workshop Technology – B.S.Raghu Vamshi – Vol II
Text books –Machine Tools – MT notes pdf – MT pdf notes – MT Pdf – MT Notes
1. Production Technology by R.K. Jain and S.C. Gupta.
2. Production Technology by H.M.T. (Hindustan Machine Tools).
Warehouse Slotting Tools
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