De Oegekloostermolen, Hartwerd

From Wikipedia, the free encyclopedia
Jump to: navigation, search
De Oegekloostermolen, Hartwerd
Hartwerd - Oegekloostermolen sfeerfoto.jpg
De Oegekloostermolen, December 2008
Mill name De Oegekloostermolen
Mill location Kloosterweg 5, 8741 KB Hartwerd
Coordinates 53°04′00″N 5°33′35″E / 53.06667°N 5.55972°E / 53.06667; 5.55972Coordinates: 53°04′00″N 5°33′35″E / 53.06667°N 5.55972°E / 53.06667; 5.55972
Operator(s) Stichting De Fryske Mole
Year built Early 19th century
Purpose Drainage mill
Type Hollow Post mill
Roundhouse storeys Single storey roundhouse
No. of sails Four sails
Type of sails Common sails
Windshaft Wood
Winding Tailpole and winch
Type of pump Archimedes' screw

De Oegekloostermolen is a hollow post mill in Hartwerd, Friesland, Netherlands which was built before 1830. The mill has been restored to working order. It is listed as a Rijksmonument, number 39347.[1]


De Oegekloostermolen was first marked on a map dated 1830.[2] It was built to drain the 90 pondemaat (33 ha; 82 acres) Hartwerd-West polder.[3] A restoration was carried out in 1970 by millwright Westra of Franeker. In 1981, the mill was sold by the Knol brothers to De Hollandsche Molen. In 1986, Westra fitted a new roof and sails to the mill. A further restoration in 1985 put the mill back into full working order. The mill was working until 1989. On 17 May 1989 it was sold to Stichting De Fryske Mole (English: Frisian Mills Foundation).[2] The mill is kept in reserve should it be needed to drain the polder.[4]


De Oegekloostermolen is what the Dutch describe as an spinnenkop. It is a hollow post mill on a single storey octagonal roundhouse, one of only four in Friesland. The mill is winded by tailpole and winch. The roundhouse and mill body are boarded, while the roof is covered in horizontal weatherboards. The sails are Common sails.[2] They have a span of 9.10 metres (29 ft 10 in).[1] The sails are carried on a wooden windshaft The windshaft also carries the brake wheel which has 33 cogs. This drives the wallower (16 cogs) at the top of the upright shaft. At the bottom of the upright shaft, the crown wheel, which has 27 cogs drives a gearwheel with 28 cogs on the axle of the Archimedes' screw. The axle of the Archimedes' screw is 230 millimetres (9 in) diameter. The screw is 800 millimetres (2 ft 7 in) diameter and 3.20 metres (10 ft 6 in) long. It is inclined at 25°. Each revolution of the screw lifts 106 litres (23 imp gal) of water.[2]

Public access[edit]

De Oegekloostermolen is open by appointment.[5]


  1. ^ a b "Technische gegevens" (in Dutch). De Hollandsche Molen. Retrieved 14 March 2010.  (Click on "Technische gegevens" to view.)
  2. ^ a b c d Stichting De Fryske Mole (1995). Friese Molens (in Dutch). Leeuwarden: Friese Pers Boekerij bv. p. 215. ISBN 90-330-1522-6. 
  3. ^ "Geschiedenis" (in Dutch). De Hollandsche Molen. Retrieved 14 March 2010.  (Click on "Geschiedenis" to view.)
  4. ^ "Hantum, Friesland" (in Dutch). Molendatabase. Retrieved 14 March 2010. 
  5. ^ "Informatie" (in Dutch). De Hollandsche Molen. Retrieved 14 March 2010.  (Click on "Informatie" to view.)