Lathe Backgear As its name implies, "backgear" is often a gear mounted at the back of the headstock
Headstock
A headstock or peghead is part of a guitar or similar stringed instrument such as a lute, mandolin, banjo, ukulele and others of the lute lineage. The main function of a headstock is to house the pegs or mechanism that holds the strings at the "head" of the instrument. At the "tail…
What is the use of back gear arrangement in a lathe?
What is the use of back gear arrangement in a lathe headstock? As its name implies, "back gear" is a gear mounted at the back of the headstock that allows the chuck to rotate slowly with greatly-increased turning power. Click to see full answer.
What is a back gear?
As its name implies, "back gear" is a gear mounted at the back of the headstock that allows the chuck to rotate slowly with greatly-increased turning power.
What does the gear box do on a lathe?
Gearbox The lathe has a gear box that controls the relative rate of the chuck and the lead screw that allows you to move the workpiece automatically using the power feed. Changing the gears allows you to change this relative speed. After removing the housing, you will see the gears.
Why do back gears slow down a lathe?
Back gears not only slow the lathe down, but increase torque as well. That is the nature of the gear trains. Going slower is good for larger diameter work-pieces to get the proper cutting speed at the perimeter.
What are back gears used for on a lathe?
The back gear mechanism is an additional part of the belt drive lathe. It is used to obtain a slower & wider range of spindle speeds, back gear disengagement & engagement. As the name implies, “back gear” is a gear mounted at the back of the headstock.
What is the purpose of back gear unit in cone pulley head Stock lathe?
Explanation: Back-gear mechanism is provided in cone pulley headstock to reduce the speed of spindle.
What is back gear?
Definition of back gear : the gearing at the headstock of a lathe for reducing the speed of the spindle from that of the driving pulley.
What is the function of headstock in lathe?
Headstock. Found on the end of the bed is the headstock. Once clamped to the end, the headstock provides the rotational power for the lathe's operations. It contains the bearings used by the lathe to rotate the workpiece against the tool bit.
What is the function of the back gear?
As its name implies, "back gear" is a gear mounted at the back of the headstock that allows the chuck to rotate slowly with greatly-increased turning power.
What are the function of gears in lathe machine?
The gears regulate the power by giving certain gear ratios. We can increase or decrease the motor rpm by installing a gear with a ratio of 1: 2 for an electric motor that has 1400 rpm.
How do you use reverse gear?
1:153:35Drive: How to move in reverse in a manual car - YouTubeYouTubeStart of suggested clipEnd of suggested clipVery slowly let the clutch out until you feel it bite. And the car wanting to move backwards. AtMoreVery slowly let the clutch out until you feel it bite. And the car wanting to move backwards. At that point press against the clutch slightly. And hold it to avoid stalling or bunny-hopping.
What happens when reverse gear is engaged at high speed?
In the case of reverse gear, an idler gear is engaged to put the vehicle in the reverse direction. This is why the transmission will make a grinding noise at higher speeds when trying to put it into the reverse gear.
How do you use 5th gear?
5th gear. 5th gear is suited to open roads and dual carriageways. Using these reference points on when to change gear is an ideal aid for learning to drive. It does however involve taking your attention away from the road and onto the speedometer to establish when to change gear.
What is tailstock and headstock?
The headstock supports one end of the workpiece and imparts rotational motion to the work. The tailstock merely supports the other end of the workpiece as it rotates.
Is headstock movable in lathe machine?
Headstock: The headstock is usually located on the left side of the lathe and is equipped with gears, spindles, chucks, gear speed control levers, and feed controllers. It mounted in a fixed position on the inner ways, usually at the left end. Using a chuck, it rotates the work.
What is this part of headstock of a lathe machine used to transmit power from the spindle?
Figure 2 - Lathe Parts DescriptionsHeadstockThe headstock houses the spindle and the components which drive the spindle and the feed gears.Emergency Stop ButtonThe emergency stop button turns off the power to the machine.1 more row
What is the name of the gear assembly on the left of the spindle?
The whole of the epicyclic gear assembly. On the left the annulus gear, free to rotate on the spindle: in the middle the carrier plate keyed to the spindle with its 3 "planet" pinions: on the right, and also free to spin on the headstock spindle, the 3-step pulley with its attached "sun" gear.
What is backgear on a lathe?
of how a lathe and associated equipment functions. As its name implies, "backgear" is often a gear mounted at the back of the headstock (although in practice it is often located in other positions, such as an epicyclicinside the headstock pulley as also shown towards the bottom of this page) that allows the chuck to rotate slowly ...
What is the importance of oil holes in backgear?
Examination of the headstock pulley and the backgear shaft may well reveal the presence of oil holes; these are important for, when working in backgear, considerable forces are being transmitted and the whole assembly requires frequent lubrication if it is to work reliably.
What is a BW on a V-pulley?
The entire length of V-pulley and gear are bushed - and able to rotate freely on the headstock spindle. The large "Bull Wheel" (BW) is keyed or held to the spindle with some sort of through-bolt or grub screw and always rotates with it.
How many slots did the carrier have?
The carrier had six slots cut in its periphery into which a block, sliding in a slot cut in the face of the annulus gear, could engaged and so lock them together. The block was clamped in place by a bolt and slackening this let the block slide out of engagement and allowed the carrier and its planet pinions to rotate.
How was the bull wheel connected to the pulley?
The bull wheel was connected to the pulley and its small gear by a claw that slid in a slot machined into the back of the gear. The claw was held in place by an Allen-headed bolt, visible in the picture positioned in line with the front bearing clamp bolt.
Who invented the bull wheel?
The backgear is a clever but essentially simple mechanism probably conceived around 1817 by Richard Roberts, an English engineer and prolific inventor.