heavy duty load washers 'hds'

The HDS washers have been specifically developed for high-strength bolts in the strength classes 8.8 –10.9 as per DIN ISO 898 Part 1 (SAE Grade 5). The loads of the washers have been matched to these bolts and are 70 to 90% of the bolt load in the flat state.

These high loads naturally require large cross-sections, which is why the outside diameter of the load washer is considerably larger than that of the Schnorr serrated safety washer. As a result, the area required for a design with load washers cannot be ignored.

As a highly progressive load increase occurs at the end of the spring deflection when the washer is flattened, the load has been indicated as double the calculated value in the following table. Tests are shown that these values are comparable with the measured values.

The HDS washers contained in the table conform to DIN 6796, Edition October 1987 ‘Conical spring washers for bolted connections’. The test specifications are laid down in DIN 267 Part 26 ‘Fasteners; technical specifications for elements made of spring steel for bolted connections’.

Explanations of the table:

Technical requirements:	According to DIN 267, Part 26
Material grades:	Spring steel according to DIN EN 10132-4, other materials on request
Available surfaces:	Hardened, blank and oiled; mechanically galvanized; other materials on request.
Article No:	Applies to the normal version made of spring steel
h max:	Maximum dimension in delivery condition
h min:	Minimum dimension after setting test according to DIN 267, Part 26
Contact force:	contact forces for the setting test according to DIN 267, Part 26
Minimum residual spring load:	Spring load, which rests after load with the contact pressure according to DIN 267, Part 2 and subsequent relieving of 100mm

Dimension table for ’HDS’ load washers according to DIN 6796 material C60 S (1.211)

Article No./ Order Ref.	Finish	Nominal Size	Ordering Dimensions					Contact Force	Minimum residual spring load
Article No./ Order Ref.	Finish	mm	d₁ mm	d₂ mm	s mm	h_max mm	h_min mm	F N	F N
700000 702110	Blank, oiled Zn12M+passivation	2	2.2	5	0.4	0.5	0.60	*	*
700100 702120	Blank, oiled Zn12M+passivation	2.5	2.7	6	0.5	0.6	0.72	*	*
700200 702130	Blank, oiled Zn12M+passivation	3	3.2	7	0.6	0.7	0.85	*	*
700300 702140	Blank, oiled Zn12M+passivation	3.5	3.7	8	0.8	0.9	1.06	*	*
700400 702150	Blank, oiled Zn12M+passivation	4	4.3	9	1.0	1.1	1.30	4400	1400
700500 702160	Blank, oiled Zn12M+passivation	5	5.3	11	1.2	1.3	1.55	7200	2300
700600 702170	Blank, oiled Zn12M+passivation	6	6.4	14	1.5	1.7	2.00	10200	4200
700700 702180	Blank, oiled Zn12M+passivation	7	7.4	17	1.75	2.0	2.30	14800	6200
700800 702190	Blank, oiled Zn12M+passivation	8	8.4	18	2.0	2.2	2.60	18600	7700
700900 702200	Blank, oiled Zn12M+passivation	10	10.5	23	2.5	2.8	3.20	29600	12400
701000 702210	Blank, oiled Zn12M+passivation	12	13.0	29	3.0	3.4	3.95	43000	18000
701100 702220	Blank, oiled Zn12M+passivation	14	15.0	35	3.5	4.0	4.65	59100	25000
701200 702230	Blank, oiled Zn12M+passivation	16	17.0	39	4.0	4.6	5.25	80900	34000
701300 702240	Blank, oiled Zn12M+passivation	18	19.0	42	4.5	5.1	5.80	102000	57000
701400 702250	Blank, oiled Zn12M+passivation	20	21.0	45	5.0	5.6	6.40	130000	73000
701500 702260	Blank, oiled Zn12M+passivation	22	23.0	49	5.5	6.1	7.05	162000	91000
701600 702270	Blank, oiled Zn12M+passivation	24	25.0	56	6.0	6.8	7.75	188000	122000
701700 702280	Blank, oiled Zn12M+passivation	27	28.0	60	6.5	7.3	8.35	246000	161000
701800 702290	Blank, oiled Zn12M+passivation	30	31.0	70	7.0	8.0	9.20	300000	196000

* dimensions not listed in DIN 267, Part 2

Load washers according to DIN 6796 in different finish and material are available on request.

heavy duty load washers 'hds'

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