Product Description; Short Description And Proper Use; Technical Data - Duerkopp Adler 271 Operating Instructions Manual

1. Product Description

1.1 Short Description and Proper Use

The 271 to 274 are flat single needle-double saddle stitch
sewing machines with thread trimming devices for
straight seams to stitch type 301.
Properly employed the machine may only be used for
sewing materials of textile fibre and garment leather.
271 with skipping bottom feed.
The machine has an automatic central oil wick lubrication
with oil reservoir as well as a seperate automatic hook
lubrication, also with oil reservoir. The oil levels are
visible through inspection glasses.
Through equipping with thread regulators the same
sub-classes, with appropriate choice of sewing device
and needle, can be used for sewing thick as well as thin
material.
The operation of the tension activation, the thread
trimming, the automatic bartack and the pressure foot lift
occur electro-magnetically. No compressed air is required
with the exception of classes 273, 274 and 272-740142.
For further technical characteristics and equipment for
each sub-class see under 1.2 Technical Data.
272 as 271, but with additional needle transport.
273 as 271, but with additional intermittent roller top feed.
The transport distance of the roller top feed is a max.
7mm. With an adjustment wheel at the front of the
machine arm it can be given a setting differing from the
bottom feed.
It has stable rpm up to a maximum number of stitches of
5500 stitches/min. This means constant stitch lengths as
well as smooth and unshifted seams even with quick rpm
changes.
Automatic lifting of the carrier roller by change over to
transport to the rear(bartack).
274 as 273, but with additional needle transport.
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