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4.8.
Screw cutting
Similar to turning with auto feed except that the feed rate is very much faster, demanding increased care from the operator.
4.8.1. Select the required leadscrew gear train from the chart (fig.7).
4.8.2. undo the headstock end cover (fig.1.7) retaining screws and remove the cover.
4.8.3. undo the three gear retaining screws (fig.8.1, 2 & 3), using the chuck key to hold the chuck (and therefore the gear train) if necessary.
Slacken the adjuster nut (fig.8.4).
4.8.4. replace the existing gears with those required, in the positions shown in fig.9, taking care to retain the drive keys in each shaft.
Note that where only gears A, B and d are specified, spacer e is fitted after gear d (fig.9.1) - d then meshes with B. If a gear c is
specified then note that the gear d shaft spacer e must go on the shaft before the gear, which will then mesh with gear c (fig.9.2).
4.8.5. Adjust gear B, or gears B and c, so that the train meshes with minimum backlash but without being tight.
4.8.6. tighten adjuster nut (fig.7.4) and refit the end cover. DO NOT operate the lathe without the end cover fitted.
4.8.7. Mount the workpiece in the lathe with the left hand end of the intended thread as far from the chuck as possible.
4.8.8. ensure that the automatic feed is disengaged (fig.5.A) and that the leadscrew lever (fig.4.B)
is set to forward.
4.8.9. With the tool positioned for the first cut, switch on the lathe and set to the appropriate speed.
Note:
In order that the second and subsequent cuts start at the same place as the first cut it is vitally
important that the indicator dial (fig.10) is used, as follows, when starting each cut.
4.8.10. from the chart (fig.7) read the dial number(s) relating to the thread to be cut. If there is a
choice, select a specific number.
4.8.11. engage the automatic feed as your selected number on the rotating dial passes the datum line.
4.8.12. When the tool reaches the end of the thread, disengage the automatic feed but DO NOT switch
off the lathe.
4.8.13. reposition the tool for the second cut and engage the automatic feed again as your selected
number on the rotating dial passes the datum line. repeat until the thread is finished.
5. MAINTENANCE
WARNING! ensure that the lathe is unplugged from the power supply before attempting any maintenance.
5.1.
lubricate the leadscrew bearings before each use (remove the end cover to access the left-hand bearing).
lubricate the leadscrew thread before each use.
lubricate the cross slide before each use (oil hole between hex. socket screws).
5.2.
clean the machine after each use and oil all machined surfaces.
5.3.
the motor brushes may be inspected/replaced via screw caps which are accessed through holes, one in the front and one in the rear
of the headstock base.
5.4.
If any play becomes apparent in either of the slides adjust as follows:
a) loosen the lock nuts of the three gib strip adjusting screws (fig.6.d shows the screws for the compound slide. those for the cross
slide are on the right-hand side of the slide).
b) lightly tighten all three screws equally and check that the slide will not move with normal effort on the handle.
c) Back-off each screw by 1/4 turn and tighten the lock nuts.
d) check that there is no play and that the slide moves smoothly.
e) If further adjustment is required, tighten or loosen the three screws as necessary by 1/8th of a turn only and re-check.
NOTE: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior notice.
IMPORTANT: No liability is accepted for incorrect use of this product.
WARRANTY: Guarantee is 12 months from purchase date, proof of which will be required for any claim.
INFORMATION: for a copy of our latest catalogue and promotions call us on 01284 757525 and leave your full name and address, including postcode.
Sole UK Distributor, Sealey Group,
Kempson Way, Suffolk Business Park,
Bury St. edmunds, Suffolk,
IP32 7Ar
Original Language Version
www.sealey.co.uk
01284 757500
Web
01284 703534
sales@sealey.co.uk
email
SM3002.V2
fig.10
Issue: 4 - 13/02/12
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