background image

 10

 

 

 

Door for change 
gear compartment

Protective cover, enclosing the motor pulley, the drive pulley and drive 
belt and the change gears. The gear cover operates an interlock 
microswitch that will prevent the motor being started if the cover is not 
closed. 
 

Oil drain plug 

The oil drain plug is a hex head bolt with a sealing washer located low 
down at the rear of the headstock gear box, - when refitting the oil 
drain plug ensure that the mating faces of the headstock and the 
sealing washer are clean. 

Headstock cover 
plate 

The headstock cover plate is a flat metal plate secured to the top of 
the headstock gearbox by four cap head bolts. Unscrew the bolts and 
remove the cover to inspect the gearbox or replace or top up the oil. 
There is no gasket beneath the cover plate, so ensure the mating 
surfaces are clean before replacing the cover. 
 

18T reversing 

The 18T reverse tumbler gear, when fitted, enables the rotation of the 
leadscrew to be reversed, For left hand threads (as Fig 6) or in the 
case of an asymmetric change gear selection to allow the leadscrew 
to maintain its correct rotation (as Fig 7). 
Fig 11 shows the reverse tumbler gear fitted in the gear train. 
 

Oil sight glass 

The oil level sight glass enables you to check the amount of oil you 
have in your lathe. 

 

Fig 6                                                          Fig 7 

       

18T reversing gear (left hand thread) 

 

                                                                   

63T                                                                        63T 

 

 

 

                                                                   

60T 

 

                                                                  40T                                                                        40T 

 

                                                                  18T                                                                        18T 

 

 

                                                                    40T                                                                      40T 

 

 

 

 

 

 

 

Identification and Description of the parts   

       

Содержание BV20BL

Страница 1: ...PRECISION BENCH LATHE BV20BL OPERATION MANUAL ...

Страница 2: ... supplied with a mould 13 Arnp Plug and 3 core power cable Before using the machine inspect the cable and the plug to make sure that neither are damaged If any damage is visible have the machine inspected repaired by a suitably qualified person If it is necessary to replace the plug it is preferable to use an unbreakable type that will resist damage Only use a 13 Arnp If extension leads are to be ...

Страница 3: ... holes to allow for bolt fixing Set out the centers of the holes as follows sizes are minimum excepting distance between centers From the left side of the bed Headstock side 170mm 150mm from the front edge of the bed Distance between centers 650mm second hole again 150mmfrom front edge Bolt the lathe to the bed using M12 nuts bolts and washers Once the lathe is mounted remove the headstock cover p...

Страница 4: ... Leadscrew Gearbox ratio 6 1 Weight 140Kg Overall size Lathe only 1050 x 615 x 560mm Main Axis This is the axis established through the spindle of the headstock It is horizontal to and parallel with the lathe bed along its length Work Axis This is the axis established by the work piece it is horizontal to but not necessarily parallel with the lathe bed along its length Traverse Axis This is the ax...

Страница 5: ...ns available rotates at a selected ratio to the spindle to enable the various screw threads to be cut or to provide a feed rate for the saddle when auto feed is selected Chuck Safety cover A clear acetate cover mounted on a pivot bar on the rear top front face of the headstock it can be tipped out of the way to access the chuck when it is stationary and repositioned over the chuck during operation...

Страница 6: ...down to engage the feed As there is no synchronising dial indicator fitted for thread cutting to ensure correct pick up during thread cutting leave the auto feed lever engaged Disengage the tool clear of the work Stop the spindle electrically reverse the drive system and drive tool back clear of the working piece stop the spindle switch back to normal and set the new cutting depth and restart the ...

Страница 7: ...and forward across this base about the central axis of the lathe There are two opposing screws set in the base that control the movement of tailstock the screws have to be adjusted sequentially i e loosen tighten loosen tighten etc to move the tailstock Gear change levers Two levers marked A and B which in their setting select the different spindle speeds of the lathe Refer to the Speed change cha...

Страница 8: ... Fig 2 Tailstock barrel Clamping lever Chuck assembly Machine Illustration and key parts description Chuck safety cover Chuck Headstock Tool Post Tailstock Rack Leadscrew Protection cover Compound slide Saddle ...

Страница 9: ...e control Traverse slide control Auto feed lever Traverse slide Fig 4 Tailstock barrel lock Tailstock barrel Tailstock drive handle Tailstock clamping Tailstock offset screw Fig 5 Gear change levers B A Reversing switch under cover Machine Illustration and key parts description ...

Страница 10: ...eadstock gearbox by four cap head bolts Unscrew the bolts and remove the cover to inspect the gearbox or replace or top up the oil There is no gasket beneath the cover plate so ensure the mating surfaces are clean before replacing the cover 18T reversing The 18T reverse tumbler gear when fitted enables the rotation of the leadscrew to be reversed For left hand threads as Fig 6 or in the case of an...

Страница 11: ...11 Fig 8 Fig 9 Headstock cover plate Oil sight glass Oil drain plug Door for change gear box Fig 10 Machine Illustration and key parts description Door micro switch ...

Страница 12: ...untings H Daily Pre use 1 Clean all swarf and chips away from the machine bed slide surfaces and the tool post 2 Exercise the slide and ensure no swarf etc is lodged in the drive shaft tunnels 3 If you have been using suds make sure the machine is thoroughly dried off Clear the suds tray of all swarf and chips especially around the drain 4 Check the tool ensure it is usable the next time if not re...

Страница 13: ...63 50 35 0 45 45 50 60 80 26 50 65 80 42 0 5 30 80 40 24 50 63 80 40 0 6 45 60 50 22 50 55 80 42 0 7 63 45 60 20 40 80 21 0 75 45 65 40 19 60 63 80 38 0 8 60 55 50 18 50 63 80 30 1 0 45 80 30 16 50 80 21 1 25 45 80 24 14 50 42 80 35 1 5 63 42 60 40 12 50 60 80 21 1 75 63 60 24 11 50 55 80 21 2 0 63 65 21 10 60 42 80 30 2 5 45 40 100 30 9 40 45 100 21 3 0 63 40 100 35 8 60 42 100 30 Oil Lubrication...

Страница 14: ...14 Parts Diagram ...

Отзывы: