Compression springs
Patented drawn spring steel wire in compliance
with EN 10270 part 1 type DH for all wire
diameters up to 1.9 mm. For diameters between
2.0 and 12.0 mm type SH will be used (A228 / BS
5216). Our stainless steel springs are manufac-
tured using spring steel wire material no. 1.4310
in compliance with EN 10270 part 3 (A301 / BS
301S21). The tolerances of the wire diameters
comply with EN 10270.
The springs are right-hand coiled (clockwise). All
springs have closed ends. Springs with larger
wire diameters than 0.45 mm are also closed and
ground. All springs which show a tendency to set
themselves (i.e. not to return to their original
length after compression) are prestressed. All
springs are ultimately thermally treated and
stress relieved.
In the catalogue the number of active coils is
given in the column "n". The number of closed
coils on the spring ends must be added to this
figure. 1.5 or 2 coils will be added, depending
upon the original number of active coils, so that
the optimum 180° position of the end coil can be
reached. However, an exact 180° position of the
end coil cannot always be obtained, because a
production compensation for the stated
tolerances is carried out according to the number
of active coils.
Springs manufactured from spring steel EN
10270-1 type DH and SH are slightly lubricated
following the thermal treatment. The springs can
be delivered with any additional standard surface
protection for an extra charge. Springs made of
material no.1.4310 will not be re-coated after the
thermal coating, as a surface protection is not
normally required.
For an extra charge we can deliver your springs
with any common surface protection or with a
surface strengthened through shot peening. Shot
peening increases the springs' service life.
Please contact our services department in
Metzingen and Cunewalde if you have any
questions about surface treatment.
Metzingen
Phone 0049 (0)7123 960-119, Fax -195
Cunewalde
Phone 0049 (0)35877 227-0, Fax -14
All springs in our sales warehouse are quality
controlled. This is carried out in our quality
control department independent from the
production process. The test for those springs
destined for sale is carried out according to the
DIN ISO 2859-1 inspection level II. The
procedure normally consists of a simple spot
check program, test-level AQL = 1.0. Every article
tested recieves a test mark, which is recorded in
the quality record book. All procedures are
explained in our Quality Handbook.
Standard springs are inspected for compliance to
the stated tolerances. Specific tests can also be
carried out and documented for each individual
spring upon the customer's request.
The following charges apply for the quality
control certificates issued by us.
In compliance with:
EN 10204-2.1 for free
EN 10204-2.2 EUR 15,34
EN 10204-3.1B EUR 30,68
Please contatct our Quality Assurance
department with any questions you may have
about testing and quality assurance.
Phone 0049 (0)35877 227-11, Fax -14
The calculation and design of the springs is
carried out in accordance with EN 13906-1.
Production compensation is usually required in
order to keep within the stated tolerances (refer
to EN 15800).
All the tolerance ranges of our standard sized
springs are stated (coil diameter - De, free length
- L0, and maximum load - Fn). These tolerances
are maintained by varying the number of the
active coils (n). However, due to these measures
the desired 180° position of the spring ends
cannot always be obtained.
Material
Style
End coils
Quality control
Spring design
Production Compensation
Surface
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