26
Figure 46 – Speed control chain adjustment
13.11
Lead Screw
To ensure the pitch accuracy in cutting threads,
any axial run-out of the lead screw must be
eliminated. See Figure 47. This is achieved by
adjusting the thrust bearings (2 and 3) using the
nut (1).
Figure 47 – Lead screw runout adjustment
13.12
Apron Feed Clutch
The feed transmission begins with the feed rod to
the apron, through feed clutch to worm, through the
gear drives, to longitudinal or cross movement.
The worm axle is equipped with an overstep clutch
to provide rapid feed for the carriage. When the
rapid feed motor drives the worm axle, it oversteps
the feed rod in one direction.
The carriage (longitudinal feed) handwheel is
automatically disengaged when the carriage is in
rapid feed or longitudinal automatic feed. When the
feed movements stop, the handwheel will
reengage.
If the cutting force will not reach rated maximum
value, remove the cap and adjust the clutch using
the adjusting screw (see Figure 48).
Do not over tighten the feed
clutch. Over tightening may nullify the
protective feature and can damage the lathe.
To avoid feed rod and lead screw engaging at the
same time, an interlocking mechanism is situated
between longitudinal feed axle and half nut
operation axle.
Figure 48 – Feed clutch adjustment
13.13
Tool Post
Tool holder (2) is positioned to the tool post body
(1) through a dovetail groove and its center height
can be adjusted by sliding the dovetail along the
groove and turning screw (5).
The tool holder can be fixed by turning lever (7)
and the middle bolt will drive the wedge block (4)
downward for clamping the tool holder.
The whole tool post can be fixed by the top nut (6).
Tool shank can be fixed to the tool holder by its
screw (3) (see Figure 49).
Summary of Contents for GH-26120ZH
Page 34: ...34 18 0 Change Gear Diagram Figure 54 ...
Page 35: ...35 This page intentionally left blank ...
Page 40: ...4 1 1 Bed Assembly I Exploded View ...
Page 41: ...5 1 2 Bed Assembly I for 120 ZH only Exploded View ...
Page 44: ...8 2 1 Bed Assembly II Exploded View ...
Page 45: ...9 2 2 Bed Assembly II for 120 ZH only Exploded View ...
Page 48: ...12 3 1 Headstock Assembly I Exploded View Ⅲ Ⅳ Ⅴ Ⅶ Ⅵ Ⅱ Ⅰ Ⅱb Ⅶb ZⅡ ZⅠ ZⅡ ...
Page 51: ...15 4 1 Headstock Assembly II Exploded View ...
Page 54: ...18 5 1 Headstock Assembly III Exploded View ...
Page 56: ...20 6 1 Headstock Assembly IV Exploded View Ⅰ Ⅱb Ⅱ Ⅲ Ⅳ Ⅴ ...
Page 59: ...23 7 1 Headstock Assembly V Exploded View Ⅶ Ⅶb Ⅵ ...
Page 62: ...26 9 1 Gear Box Assembly I Exploded View Ⅱ Ⅲ Ⅰ ...
Page 64: ...28 10 1 Gear Box Assembly II Exploded View ...
Page 67: ...31 11 1 Gear Box Assembly III Exploded View ...
Page 70: ...34 12 1 Brake Assembly Exploded View ...
Page 72: ...36 13 1 Saddle and Cross Slide Assembly Exploded View ...
Page 75: ...39 14 1 Tool Post and Compound Rest Assembly Exploded View ...
Page 77: ...41 15 1 Apron Assembly I Exploded View Ⅱ Ⅹ Ⅱ Ⅲ Ⅷ Ⅹ Ⅸ Ⅹ Ⅳ Ⅰ Ⅹ Ⅰ Ⅵ Ⅲ Ⅴ Ⅶ ...
Page 80: ...44 16 1 Apron Assembly II Exploded View Ⅺ Ⅹ Ⅲ Ⅻ Ⅸ Ⅹ Ⅶ ...
Page 83: ...47 17 1 Apron Assembly III Exploded View Ⅰ Ⅱ Ⅴ Ⅲ Ⅳ Ⅵ ...
Page 85: ...49 18 1 Apron Assembly IV Exploded View ...
Page 87: ...51 19 1 Tailstock Assembly I Exploded View ...
Page 89: ...53 20 1 Tailstock Assembly II Exploded View ...
Page 91: ...55 21 1 Steady Rest Assembly Small and Large Exploded View ...
Page 95: ...59 24 1 Travel Stop Assembly Exploded View ...
Page 100: ...64 27 2 Electrical Diagram ...