CHESTER 626 TURRET MILL User manual

626 TURRET MILL
OPERATION MANUAL
Chester Machine Tools
Hawarden Industrial Park,
Hawarden,
Chester,
CH5 3PZ.
Tel: [phone]
Fax: [phone]
Email:[email protected]
Website: www.chestermachinetools.com

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CONTENTS
1. Introduction
3
2. Health &
Safety
4 –5
3. Machine
Specification
6
4. Main
Applications &
Features
7-8
5. Wiring
Diagram
9
6. Part Diagrams
10-11
7. Part List
12-13
8. Inspection
Record
14
9. CE
Certificate
15

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INTRODUCTION
Chester UK Limited is a specialist company that has been supplying the machine tool
industry for over 15 years. The Chester UK Head Office comprises of a 30,500 sq.ft factory complete
with offices and a showroom. Specialising in conventional machine tools, Chester has built a
reputation for quality and reliability, which is highly regarded in the machine tool industry and the
model engineering market.
There are several divisions within the company; Export, Education, Model Engineering & UK
Sales, all with dedicated sales personnel who are trained to answer your questions.
When buying from Chester you can be assured of a complete back-up service with
mechanical and electrical engineers that are available to give advice if required.
Stock is a large part of any business and Chester have always invested substantially in
building a large quantity of machines and spares, ready to satisfy customer requirements. Chester UK
has one of the largest stocks of conventional new machines and accessories within Great Britain.
Please take time to visit our website: www.chestermachinetools.com

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HEALTH AND SAFETY
As with all machinery there are certain hazards involved with the operation and use of the
lathe. Using the machine with respect and caution will considerably lessen the possibility of person
injury. However, if normal safety precautions are overlooked or ignored, personal injury to the
operator may result.
This machine was designed for certain applications only. We strongly recommend that the machine is
not modified, and / or used for any application other than which it was designed. If you have any
questions relative to its application do not use the machine, until you have first been in contact
with Chester UK.
The lathe may not arrive with a power socket or plug. In the event of this happening, please inform
Chester UK on Tel: [phone].
Safety rules for all tools
User
1. Wear correct apparel
No loose clothing, gloves, rings, bracelets or other jewellery to get caught in moving parts.
Non-slip footwear is recommended. Wear protective hair covering to contain long hair.
2. Always wear eye protection
Refer to ANSLZ87.1 standard for appropriate recommendations. Also use face and / or a dust
mask if the cutting operation is dusty.
3. Don’t overreach
Keep a proper footing and balance at all times.
4. Never stand on a tool
Serious injury could occur if the tool is tipped or if the cutting tool is accidentally contacted.
5. Never leave the tool running unattended
Turn power off. Leave tool until it comes to a complete stop.
6. Drugs, alcohol and medication
Do not operate the tool while under the influence of drugs, alcohol or any medication.
7. Make sure the tool is disconnected from the power supply
While motor is being mounted, connected or reconnected.
8. Always
Keep hands and fingers away from any moving parts.
9. Stop
The machine before moving chips.
10. Shut-off
Power and clean the lathe and work area before leaving the machine.
Use of the machine
1. Remove adjusting keys and wrenches
Form a habit of checking to see that keys and adjusting wrenches are removed from the tool
before turning it ‘on’.
2. Don’t force the tool
It will do the job better and be safer at the rate for which it was designed.
3. Use the right tool
Don’t force the tool or attachment to do a job for which it was not designed.
4. Secure work
Use clamps or a vice to hold work when practical. It’s safer than using your hands, and frees
both to operate the machine.
3

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5. Maintain tools in top condition
Keep tools sharp and clean for the best and safest performance. Follow instructions
for lubricating and changing accessories.
6. Use recommended accessories
Consult Chester UK for recommended accessories. The use of improper accessories
may cause hazards.
7. Avoid accidental starting
Make sure the switch is in the ‘OFF’ position before plugging in power cord.
8. Stop
The machine before putting material in the vice.
9. Always
Have stock firmly clamped in the vice before starting the cut.
10. Ground all tools
If the tool is equipped with a three-prong plug, it should be plugged into a three-hole
electrical receptacle. If an adapter is used to accommodate a two-prong receptacle, the
adapter plug must be attached to a known ground. Never remove the third prong.
Adjustment
Make all adjustments with the power off. When assembling follow the manuals
instructions, this will ensure correct instruction and a safe structure.
Working environment
1. Keep the work area clean
Cluttered areas and benches invite accidents.
2. Don’t use in a dangerous environment
Don’t use power tools in damp or wet locations, or expose to rain. Keep the work area
well lit.
3. Keep children etc at a safe distance.
All children etc should be kept at a safe distance from the work area.
4. Don’t
Install & use this machine in an explosive dangerous environment.
Maintenance
1. Disconnect
Machine from the power source when making repairs.
2. Check damaged parts
Before further use of the tool, a guard or other part that is damaged should be
carefully checked to ensure that it would operate properly and perform its intended
function check for alignment of moving parts, binding of moving parts, breakage of
parts, mounting and any other conditions that may affect its operation. A guard or
other part that is damaged should be properly repaired or replaced.
3. Disconnect tools
Before servicing and when changing accessories such as blades bits, cutters, etc.
4. To prevent
The corrosion of machined surfaces when a soluble is used as coolant, pay particular
attention to wiping dry the surfaces where fluid accumulates and does not evaporate
quickly, such as between the machine bed and vice.

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Safety Device
1. Interlock switch on pulley cover. As soon as the pulley cover is open, the machine
will come to a stop with the function of this switch. Do not remove this switch
from the machine for any reason, and check it’s function frequently.
2. Interlock switch on cutting area. As soon as the pulley cover is open, the machine
will come to a stop with the function of this switch. Do not remove this switch
from the machine for any reason, and check it’s function frequently.
MACHINE SPECIFICATIONS
Drilling Capacity
32mm
End Milling Capacity
25mm
Face Milling Capacity
75mm
Table Size
156x745mm
Longitudinal Travel
365mm
Cross Travel
135mm
Max. Distance Spindle to Table
330mm
Distance between Spindle & Column
155mm
Head Tilt
45 deg Left or
Right
Knee Travel
330mm
T’ Slot Size
14mm
Number of Spindle Speeds
9
Spindle Speed Range
190 – 2100rpm
Spindle Stroke
80mm
Spindle Taper
MT3 or R8
Motor
1½hp
Supply
240volt or 415volt
Dimensions (WxDxH)
1085x990x1710mm
Weight
410Kgs

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FEATURES AND MAIN APPLICATIONS
Features
The 626-turret mill is a compact vertical milling machine, easy to set up, with controls
designed for easier operation (dual hand wheels).
A practical machine that can be easily used for technical schools, small parts production, tool
rooms, R&D work, maintenance shops and even hobby use.
Ideally suited for many operations: conventional milling, compound angle milling, engraving,
drilling as well as jig boring.
The ‘ways’ are hand scraped for a perfect bearing alignment, as well as the table being
ground for a perfect square ness.
All high castings are made of a high strength material. They are aged for several months
before normalizing and tempering, to minimize deformation.
Installation
To set the machine on a solid concrete foundation, it is advisable to apply a little grout to
touch up any unevenness in the concrete in order to get a solid foundation at all points.
When setting the machine on a floor that has any surface irregularities, shims should be used
to correct.
Pre-lubrication
Thoroughly clean the machine with gasoline or kerosene, and then lubricate all the slide ways
with S.A.E. #10 & gears with S.A.E. #30 lubricant. Be sure the machine is lubricated
properly before starting.

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Levelling
Set the machine by levelling the worktable lengthwise & crosswise, with a precision levelling
instrument (refer to the test readings in the attached test records).
Inspection
Inspect the machine with the attached original testing records for reference.
Switch box
The switch box is located on left side of the column, for the On – Off only.
Adjustment of the table feed travel
The table longitudinal and cross feed travel, can be set for any travel distance by simply
adjusting the stop set screws that are located in front of the table and at the right side of the
knee.
Adjustment of the table gib
The table is provided with a full-length tapered gib in the saddle with an adjustable screw at
each end. To take up gib, tighten the two screws until a slight drag is felt (when moving the
table by hand).
If the table is not tight enough, loosen the adjusting screw on the small end, and then tighten
on the big end.
If, after completing this process, you feel that the table gib is too tight, simply reverse the
above procedure.
Adjustment of saddle & knee gibs
To tighten the gibs, use the same method as previously described in the ‘Adjustment of the
table gib’.
Clamping the table, saddle & knee
When milling with the longitudinal table feed, it is advisable to clamp the knee with the
column and saddle, this will add rigidity to allow for heavier cuts with a minimum of
vibration.
The saddle-locking lever is located on the left hand side of the saddle (to the operator),
applying a clamping pressure will hold the saddle rigid.
The table clamping levers are located in front of the saddle, and should always be clamped
when a longitudinal movement is not required.
The knee-clamping lever is at the left side of the knee, leave this clamped at all times unless
the knee is in operation.
Removing the table
Remove the table as follows: hand-wheel, dial holder, turn the lead screw all the way, so that
it can be removed.

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Then the table can be disassembled quite easily.
Mounting the motor & shifting the belts for speed
The motor is mounted on a plate hinged to the pulley housing. Release the belt setting unit by
turning the handle at the side of the motor, and then shift the belts to the required speed.
Retighten and use. A speed chart is supplied for your reference.
Quill lock & vertical feed
The handle at the right lower corner of the head is called the quill lock. When the vertical
feed is not in use, set the handle to lock the quill and make the head more stable.
The micrometer depth is graduated in inches. By utilizing these simple graduations, it is
possible to work accurately to different depths.
A lock nut under the micrometer nut, assures that the micrometer nut is secured.
Quill clutch of the vertical head
The vertical feed is controlled via a hand wheel at the front of the head, as well as a handle at
the right side of the head.
When the hand wheel is in use, tighten the clutch lock nut, or loosen for handle operation.
The hand-wheel for fine feeds, handle for fast feeds.
Vertical head and tee adapter
The vertical milling head can be tilted 90° on either side; this can be accomplished by
loosening the four locking bolts on the tee adapter.
Loosen the two set bolts on the adapter; you can then swivel the vertical milling head 120°,
tighten the bolts once the correct position is achieved.
The motor and milling head must tilt together, simply because the motor & head are suspend
on the same pulley housing.

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WIRING DIAGRAM

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PART DIAGRAMS

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PARTS LIST
S/N P/N DESCRIPTION
S/N P/N DESCRIPTION
1. 250-S-IYT-1001 Vertical milling head
39. 250-S-IYT-M5x10 Screw
2. 250-S-IYT-1095 Belt housing cover
40. 250-S-IYT-T1089 Pulley cover supporting arm
3. 250-S-IYT-1005 Quill
41. 250-S-IYT-M5 Nut
4. 250-S-IYT-S-45-1010 Snap ring
42. 250-S-IYT-1016 Washer for bearing
5. 250-S-IYT-1007 Spring washer
43. 250-S-IYT-7207-1003 Bearing
6. 250-S-IYT-1002 Vertical Spindle
44. 250-S-IYT-6007zz-1003 Bearing
7. 250-S-IYT Cover
45. 250-S-IYT-6206z-1003 Bearing
8. 250-S-IYT-1008 Bearing adjusting nut
46. 250-S-IYT-1082 Bearing cover
9. 250-S-IYT-1009 Spindle sleeve
47. 250-S-IYT-R-75-1012 Snap ring
10. 250-S-IYT-1016 Pulley locking nut
48. 250-S-IYT-6009z-1011 Bearing
11. 250-S-IYT-1018 Spindle pulley
49. 250-S-IYT-1052 Thrust bearing
12. 250-S-IYT-1019 Quill pinion shaft
50. 250-S-IYT-1037 Spring
13. 250-S-IYT-1047-M5x10 Screw
51. 250-S-IYT-1020 Spring
14. 250-S-IYT-1036 Clutch worm gear
52. 250-S-IYT-E-19 Snap ring
15. 250-S-IYT-1039 Clutch
53. 250-S-IYT-M6x15-1038 Bolt
16. 250-S-IYT-1040 Clutch adjusting nut
54. 250-S-IYT-1076 Swivel arm
17. 250-S-IYT-1046 Clutch cover
55. 250-S-IYT-1075 Swivel stud
18. 250-S-IYT-1021 Pinion shaft seal
56. 250-S-IYT-R-35 Snap ring
19. 250-S-IYT-1032 Ball handles
57. 250-S-IYT-1079 Pulley pivot stud
20. 250-S-IYT-1028 Hand bar holder seat
58. 250-S-IYT-1080-58 Idle pulley
21. 250-S-IYT-1030 Handle bar
59. 250-S-IYT-1080-59 Motor pulley
22. 250-S-IYT-1051 Worm shaft
60. 250-S-IYT-1067 Motor mounting
23. 250-S-IYT-1053 Worm shaft sleeve
61. 250-S-IYT-1068 Motor suspending pivot
24. 250-S-IYT-1055 Nut for bearing
62. 250-S-IYT-1070 Motor mounting
25. 250-S-IYT-1056 Dial
63. 250-S-IYT-1072 Motor set unit handle
26. 250-S-IYT-1060 Dial positioning screw
64. 250-S-IYT-1071 Belt set unit
27. 250-S-IYT-1057 Hand wheel
65. 250-S-IYT-1071 Belt set unit
28. 250-S-IYT-1061 Handle
66. 250-S-IYT-1064 Vertical head adapter
29. 250-S-IYT-1048 Quill locking block
67. 250-S-IYT-1067-10Mx35 Screw
30. 250-S-IYT-1049 Quill locking bolt
68. 250-S-IYT-10M Bolt washer
31. 250-S-IYT-1042 Quill stop micro screw
69. 250-S-IYT-A35-1102 Vee belt
32. 250-S-IYT-1044 Micrometer nut
70. 250-S-IYT-10M Nut
33. 250-S-IYT-1045 Quill micro stop nut
71. 250-S-IYT-6003z-1081 Bearing
34. 250-S-IYT-1041 Quill stopper
72. 250-S-IYT-A32-1101 Vee belt
35. 250-S-IYT-8Mx20 Screw
73. 250-S-IYT-1HP4-POLE-1073 Motor
36. 250-S-IYT Bolt washer
74. 250-S-IYT-2006 Column
37. 250-S-IYT-1014 Draw bar
75. 250-S-IYT-2073 Table
38. 250-S-IYT-c5x15 Rivet
76. 250-S-IYT-2062 Table gib

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S/N P/N DESCRIPTION
S/N P/N DESCRIPTION
77. 250-S-IYT-2059 Adjusting screw
115. 250-S-IYT-2089 Switch
78. 250-S-IYT-2082 Longitudinal bearing
116. 250-S-IYT-“x2”-2002 Bolt
bracket
117. 250-S-IYT-2097 Light
79. 250-S-IYT-2079 Longitudinal lead screw
118. 250-S-IYT-2069 Rubber sheet
80. 250-S-IYT-2084 Nut for bearing
119. 250-S-IYT-6Mx25 Bolt
81. 250-S-IYT-2080 Longitudinal feed nut
120. 250-S-IYT-6004z-2010 Bearing
82. 250-S-IYT-2081 5Mx25 Screw
121. 250-S-IYT-6x15 Key
83. 250-S-IYT-2087 Dial
122. 250-S-IYT-2024 Washer
84. 250-S-IYT-1060 Dial positioning screw
123. 250-S-IYT-6Mx15-2008 Bolt
85. 250-S-IYT-2089 Hand wheel
124. 250-S-IYT-6Mx35 Bolt
86. 250-S-IYT-2091 Handle bar
125. 250-S-IYT-6004z-2084 Bearing
87. 250-S-IYT-2103 Long, travel adjusting
126. 250-S-IYT-S-18 Snap ring
screw
127. 250-S-IYT-2018 Oil cup
88. 250-S-IYT-2104 Adjusting screw sleeve
128. 250-S-IYT-5x5x20 Key
89. 250-S-IYT-2068 Table stopper
129. 250-S-IYT-M5x10 Bolt
90. 250-S-IYT-2060 Table locking screw
130. 250-S-IYT-6Mx45 Bolt
91. 250-S-IYT-2060 Handle bar
131. 250-S-IYT-6Mx15 Bolt
92. 250-S-IYT-2057 Saddle
132. 250-S-IYT-S-18 Snap ring
93. 250-S-IYT-2058 Saddle gib
133. 250-S-IYT-10M Bolt
94. 250-S-IYT-2069 Rubber sheet
134. 250-S-IYT Iron sheep
95. 250-S-IYT-2401 Cross lead screw
135. 250-S-IYT-M6x8 Bolt
96. 250-S-IYT-2037 Cross feed nut
136. 250-S-IYT-8Mx25 Bolt
97. 250-S-IYT-2042 Cross feed bearing bracket
137. 250-S-IYT-AW09 Washer
98. 250-S-IYT-2068 Stop block
138. 250-S-IYT-7x7x20 Key
99. 250-S-IYT-2102 Stop block fixture
139. 250-S-IYT Iron sheep soft pipe
100. 250-S-IYT-2103 Cross travel adjusting
screw
101. 250-S-IYT-2104 Adjusting screw sleeve
CAUTION:
102. 250-S-IYT-2015 Knee
103. 250-S-IYT-2016 Knee gib
Find the serial number from the
104. 250-S-IYT-2017 Knee locking screw
drawing, then use it to obtain
105. 250-S-IYT-2019 Gear shaft sleeve
the part number from this list.
106. 250-S-IYT-2020 Gear shaft
108. 250-S-IYT-2029 Elevating handle clutch
109. 250-S-IYT-2030 Handle arm
140. 250-S-IYT Cable
110. 250-S-IYT-2012 Elevating gear
141. 250-S-IYT Terminal contactor
111. 250-S-IYT-2009 Elevating lead screw
142. 250-S-IYT Pipe lead
112. 250-S-IYT-2007 Elevating lead screw set nut
113. 250-S-IYT-2059 Chip guard
114. 250-S-IYT-2001 Base

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CONTACT DETAILS
Head Office & Showroom
Address: Hawarden Industrial Park,
Hawarden,
Chester,
CH5 3PZ
Tel national: 01244 531631
Tel International: [phone]
Fax National: 01244 531331
Fax International: [phone]
Midlands Factory & Showroom
Address: Unit 4 Plant Lane Business Park,
Plant Lane, Burntwood,
Staffs,
WS7 3GN
Tel National: 01543 448940
Tel International: [phone]
Fax National: 01543 448938
Fax International: [phone]
Email: [e-mail]
Website: www.chestermachinetools.com