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Design of machine bases

A machine base is an elementary component of many machines and systems.

In this article, various constructive designs of machine bases (machine feet or mountings) are shown. The variants shown here can be used in the construction of frames, devices, units and machines of all kinds. In the examples it is assumed that the machine frame is made from a hollow profile or with an U-profile.

Variant 1 -- base plate with through holes

Machine base variant 1 - with through holes
Machine base variant 1 -- with through holes
Machine base variant 1 - with through holes, isometric view
Machine base variant 1 -- with through holes, isometric view

Variant 1 consists of an end plate that is welded to the hollow profile with a fillet weld. The front plate has 4 through-holes for the fastening screws.

Components used

Pos.-No.DesignationComment
1Hollow profile
2Front platewith 4 through holes
3Washer
4Screw

Advantages and disadvantages

AdvantagesDisadvantages
easy to manufactureno compensation for unevenness
safe against lifting loadsno vibration damping
can transmit momentsno height adjustment

Variant 2 -- with level adjustment

Machine base variant 2 - with level adjustment
Machine base variant 2 -- with level adjustment
Machine base variant 2 - with level adjustment, isometric view
Machine base variant 2 -- with level adjustment, isometric view

Variant 2 essentially corresponds to the first variant, but has additional threaded holes in the faceplate. The adjusting screws are screwed into these threaded holes. It is ideal to cast this machine base after the height adjustment, e.g. with reaction resin concrete.

Components used

Pos.-No.DesignationComment
1Hollow profile
2Face platewith 4 through holes and 4 threaded bores
3Washer
4Screw
5Screwfor level adjustment

Advantages and disadvantages

AdvantagesDisadvantages
easy to manufactureno vibration damping
safe against lifting loadsno height adjustment
can transmit moments
compensation of unevenness

Variant 3 -- internal face plate and purchased component

Machine base variant 3 - with purchased part and internal face plate
Machine base variant 3 -- with purchased part and internal face plate
Machine base variant 3 - with purchased part and internal face plate, isometric view
Machine base variant 3 -- with purchased part and internal face plate, isometric view

Variant 3 consists of an end plate with a through hole onto which a nut has been welded. The finished foot is screwed in and locked from below.

Components used

Pos.-No.DesignationComment
1Hollow profile
2Face platewith through hole
3Nutthe upper nut is welded onto the face plate
4Machine footcan be found here as finished component

Advantages and disadvantages

AdvantagesDisadvantages
easy to manufactureunsafe against lifting loads
slightly vibration dampingunsafe against transversal movement
height adjustment is possiblecan’t transmit moments
compensation of unevenness

Variant 4 -- attached front plate with purchased part

Machine base variant 4 - with purchased part and attached front plate
Machine base variant 4 -- with purchased part and attached front plate
Machine base variant 4 - with purchased part and attached front plate, isometric view
Machine base variant 4 -- with purchased part and attached front plate, isometric view

Variant 4 essentially corresponds to variant 3, with the difference that the end plate is larger and is placed on the hollow profile instead of being embedded. This variant is a little easier to manufacture than variant 3.

Components used

Pos.-No.DesignationComment
1Hollow profile
2Face platewith through hole
3Nutthe upper nut is welded onto the face plate
4Machine footcan be found here as finished component

Advantages and disadvantages

AdvantagesDisadvantages
easy to manufactureunsafe against lifting loads
slightly vibration dampingunsafe against transversal movement
height adjustment is possiblecan’t transmit moments
compensation of unevenness

Variant 5 -- with shock absorber

Machine foot variant 5 - with shock absorber
Machine foot variant 5 -- with shock absorber
Machine foot variant 5 - with shock absorber, isometric view
Machine foot variant 5 -- with shock absorber, isometric view

In this variant, the frame consists of an U-profile instead of a hollow profile. A shock absorber (or vibration damper) with a threaded hole on both sides is used. There is also a spacer plate below the base plate to cover the lower fastening screw for the mounting of the shock absorber.

Components used

Pos.-No.DesignationComment
1U-Profile
2Face platewith one through hole
3Face platewith 5 through holes
4Distance platewith 5 through holes
5Shock absorberfor example purchased from Wagner Technik Berlin
6 und 8Washers
7 und 9Screws

Advantages and disadvantages

AdvantagesDisadvantages
very good vibration damping or shock absorbingslightly more complicated structure
safe against lifting loads
compensation of unevenness
can transmit moments
replacement of the shock absorber is possible