Instruction manual
1. Product description
The Dürkopp Adler 838 is a special all-purpose sewing machine.
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It is a post-bed double-lockstitch machine.
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It has a bottom drop (feed) mechanism and a drive-powered top
roller.
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There are two setting wheels (knobs) which allow the selection of
two stitch lengths. There is also a pneumatically-controlled device
with a button for toggling between the two stitch lengths during
sewing.
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Depending on if the subclass is a single-needle or double-needle
sewing machine, the following automatic functions are featured: an
electro-magnetic thread trimmer, pneumatically-controlled
bartacking, a sewing foot lift, and a switchable upper thread
tensioner.
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The machine is equipped with a large double-sectioned vertical
hook.
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The maximum lift for the sewing foot is 12 mm.
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There is a safety clutch to avoid displacing or damaging the hook if
the thread gets jammed in the shuttle track.
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Depending on the width of the needle, swappable throat plate
inserts with corresponding stitching holes can be swapped out at
the throat plate.
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The machine features automatic wick lubrication and a viewing
window in the arm for watching the machine and hook lubrication.
Some of the oil is lost during the hook lubrication. The remaining oil
is redirected by the pump back to the central reservoir.
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Integrated bobbin winder.
2. Designated use
The 838 machines are suitable for use in producing shoes, decorative
ornamental work, and upholstery. The typical sewing material is leather
(either natural or synthetic). The sewing machine can also be used for
sewing shoe textiles.
The setup of the machine depends on the material to be sewed and
whether it is heavy or extra heavy.
Generally only dry material may be sewn with this s ewing unit. The
material may be no thicker than 7 mm when compressed by the
lowered top roller.
The sewing material must not contain any hard objects since the
sewing machine is not equipped with any form of eye protection.
This sewing machine may be set up and operated only in dry,
well-maintained premises. If the sewing machine is used in other
premises which are not dry and well-maintained it may be necessary to
take further precautions which should be agreed in advance (see
EN 60204-31: 1999).
As manufacturers of industrial sewing machines, we proceed on the
assumption that personnel who work on our products will have
received training at least sufficient to acquaint them with all normal
operations and with any hazards which these may involve.
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