1. Scope
These technical terms of delivery apply in the event of missing or unclear drawing details in addition to the customer drawing, provided that no corresponding clarification is possible or has taken place with the customer in advance. In the aforementioned case, these technical terms of delivery are to be regarded as an applicable document. Drawing details and other applicable documents provided by the customer shall always take precedence.
2. Design
2.1. Dimensional tolerances
For dimensions without tolerance specification, DIN ISO 2768-m applies. If there are dimensions without tolerance specifications under 0.5mm, they are also treated according to DIN ISO 2768-m (as dimensions 0.5-3mm).
2.2. Shape and position tolerances
According to DIN ISO 2768-K.
keysurfaces, hexagons, slots, cross-drilled holes etc. cannot be produced aligned with each other. cannot be produced aligned to each other if angle specifications are missing.
2.3. Angular tolerances
A tolerance of ±2° applies to all angles without a tolerance specification.
For chamfers and edge breaks with edge lengths 0.5mm, an angle tolerance of ±5° applies.
For chamfers and fillets without tolerance specification, the following length tolerances apply:
nominal size up to 0.2mm ±0.1mm
nominal size over 0.2 to 0.5mm ±0.2mm
nominal size over 0.5 to 1.0mm ±0.3mm
nominal size over 1.0 ±0.4mm
2.4. Non-dimensioned workpiece edges
For all non-dimensioned workpiece edges:
inner-edges +0.4mm
outer-edges -0.2
see DIN ISO 13715.
edge designations such as "sharp-edged burr-free", "sharp-edged" and "burr-free" are assumed to be ±0.05mm according to DIN 6784, i.e. h. there may be both a minimal removal and a minimal burr.
Maximum burr of +0.1mm can be added to adjacent holes. +0.1mm. If a burr-free transition is required, the chamfer size is not defined.
2.5. Test conditions for fits
A slight beveling of the scrap side at the start of the fit is accepted when checking fitting holes with plug gauges.
If fits become out-of-round due to the lability of the workpiece, internal fits are checked at the smallest, external fits at the largest point of the out-of-round. The specified tolerances are applied to these points.
2.6. Thread
design optionally cut, blasted, furrowed, rolled or swirled.
The design of threaded inlets and outlets depends on the manufacturing process, usually chamfered. Thread run-outs to the collar are of standard length based on DIN 76 Form A.
The dimensional accuracy of threads only begins with the third gear, i.e. the reject side of limit switches. i.e. the scrap side of limit gauges can be screwed on or off in this area if necessary. screwed on or screwed in.
For external threads that subsequently have to be barrel electroplated, the coating thickness to be applied is taken into account during thread production and the thread is produced with a corresponding undersize. Nevertheless, due to the mechanical load in the barrel, gauge accuracy in the area of the first thread cannot be guaranteed in every case; i.e. the ring gauge may not be able to be screwed on smoothly here.
2.7. Milling
Milled surfaces can be either dip-milled or continuously milled.
2.8. surface quality
- 2.8.1. general surface quality
The surface has a mean roughness value Ra 3.2 according to DIN EN ISO 1302 and an average roughness depth of Rz 25, provided that the measuring distance is sufficient for the determination.
The now invalid roughness specifications according to DIN 140 ("triangles") are converted according to DIN EN ISO 1302 / series 2 / measured value Ra.
- 2.8.2. Surface quality in bores
Tolerance field in accordance with DIN ISO 286-1
Bores without ISO fit tolerances Ra 12.5
Fits IT 11 Ra 6.3
Fits IT 10, IT 9, IT 8 Ra 3.2
Fits IT 7, IT 6, IT 5 Ra 0.8
2.9 Butzen
Unless the drawing expressly requires the removal of turned slugs, the turned parts produced may have turned slugs on their end faces (flat surfaces). This also applies in the case of a generally valid machining mark in or on the title block.
The size of the slug is measured according to DIN 6785.
2.10 Input material / provided material
Tolerance of the outer dimension for steel bars: h9 according to DIN 10277
Pole length: max. 3100mm
2.11. heat treatment / surface treatment
- 2.11.1. dimensional changes due to heat and surface treatments
In all cases, the layer thickness of the surface to be subsequently applied must be taken into account for all dimensions. The same applies to dimensional changes due to heat treatments. Excluded from this are standard commercial dimensions specified by the base material, unless this is specifically indicated in the drawing.
- 2.11.2 Case hardening depths
If grinding or reworking is required after case hardening, the case hardening depth is based on this area. In other areas, the depth is exceeded by the corresponding allowance.
2.12 Shipping status
All parts are shipped clean, dry, free of oil and grease and without preservation in disposable boxes.
3. Quality certificates / tests
Written quality certificates are only supplied on request.
test certificates for primary materials are issued in the form of works certificates 2.2 in accordance with DIN EN 10204.
Unless expressly stated on the drawing or other applicable documents, the ordered parts will only be subjected to a dimensional inspection in accordance with an internally defined inspection severity.
We assume an incoming goods inspection at the customer's premises in accordance with $377 HGB.