Donati DMK Electric Chain Hoist

400v 3Ph 50Hz electric hoist with options for hook/eye suspension or manual, geared and electric trolleys. Single or dual speed lift/travel. 125kg to 4 tonne.

Model:

DMK / DDEC-4296

The Donati "DMK Series" Electric Chain hoists are produced according to the design of modular components, which when assembled together in relation to industrial and commercial needs allows a vast amount of standard and specialist executions to be carried out economically and rapidly.

A High level of Quality is guarenteed and checked by Donati's company quality control system according to UNI EN ISO 9001: 1994 Standards.

The Manufacturer uses the most advanced technology based on production processes and allows the putting together of totally reliable and technically innovative machines.

Configurations

The massive flexibility when applying the DMK Hoist allows 6 standard configuration options:

Fixed Configuration: Eyebolt suspension as standard or hook-suspension on request
- Sold with eyebolt suspension
- More than 150 standard executions - 1 or 2 lifting speeds
- Capacities from 125 up to 4000 kgs.
- FEM (ISO) : 2M(M5)
- Standard hook runs 3 mts. (different lengths on request)
- High-strength steel rod chain 80kg/mm²
- Noise level less than 85 dB (A)
- Epicyclic crown wheel reduction gear and self-braking electrical motor with conical brake that ensures efficient braking action.
- Motor protection IP55, insulation class "F"
- Supply voltage : 400V- 3 phase - 50 Hz.
- Low voltage controls 48V
- Single chain fall (up to 2000 kgs.) with clutch device, dual chain falls (up to 4000 kgs.) with electromechanical overload device and raise/lower limit switches
Hand-pushed (Manual push) Trolley: Recommended for light duty/short load travel only, Allows a horizontal push to move the load.
- Horizontal movement by push/pulling the load
- Recommended for light duty and short load travel only
- The push trolley is adjustable for variable flange widths, fitted with steel machined wheels, permanently self-lubricated bearings, fitted with anti tilt derailment bars and equiped with shock absorbing buffers.
- Capacities from 125 up to 4000 kgs.
- FEM (ISO) : 2M(M5)
- Working at one or two lifting speeds
- Other characteristics as per DMK in fixed execution
Electrically operated (Motorised) Trolley: When manual load pushing is not feasable or is too heavy duty, the load can be moved electronically using the hoists' push-button panel.
- Movement operated by the push button panel fitted on the hoist
- Recommended when manual load pushing is not feasible and for heavy duty use.
- The electric trolley is adjustable for variable flange widths, fitted with steel machined wheels, permanently self-lubricated bearings, fitted with anti tilt derailment bars to prevent drop or derailing, and equipped with shock absorbing buffers.
- The trolley can be supplied at:
  1. 1 speed - m/min. 11 or 22
  2. 2 speeds - m/min. 7/22
- Electric limit switches to limit the horizontal travel of the electric trolley on the beam
- Suitable for rectilinear monorails; with special devices it can runs on curves (minimum internal radius on the technical catalogue)
- Capacities from 125 up to 4000 kgs.
- FEM (ISO) : 2M (M5)
- Other characteristics as per DMK in fixed execution
Manual Gear operated Trolley: The operator controls the trolley by means of a chain that moves the wheels along the beam, advised for when load travel is short or a low number of cycles is needed.
Low Headroom: The hoist is fitted to a frame with two trolleys (either Electrical or Manual) to get the maximum hook-run and comes with a return system for the chain.
- The best solution to get the maximum hook-run; fitted on a frame with a return system for the chain, the frame is mounted on 2 trolleys.
- Available in electric or hand-push execution
- Capacities from 125 up to 4000 kgs.
- FEM (ISO) : 2M(M5)
- Lifting and travelling at 1 or 2 speed
- Other characteristics as per DMK in fixed execution
Climbing: This allows reaching to the installation point with the hook and related chain without having to lift the entire weight of the hoist, this is more suited to the entertainment industry, where frequent dismantling and installation of the hoist at great heights takes place.
- Allows the reaching of the installation point with the hook and the related chain, without having to lift the entire weight of the hoist.
- It is particularly suited to the entertainment industry and when frequent installation and dismatling at greater heights are requested.
- Capacities from 125 up to 2000 kgs.
- FEM (ISO) : 2M (M5)
- Lifting speed : mt/min. 4 or 8
- Chain box in cloth
- Other characteristics as per DMK in fixed execution

Electrical Power Supply

The DMK electric chain hoists are designed to be powered with alternate current with:

Three-phase voltage of 400 V - 50 Hz. according to IEC 38-1.
Single-phase voltage of 230 V +/- 5% - 50Hz. (for DMK hoists 1 - 2 - 3, at one speed and capacity up to 800 kg).
Voltage and frequency different from standard are available on request.

Conditions of use in standard execution:

Temperature of use: minimum - 10° C; maximum +40° C.
Maximum relative humidity: 80%
Maximum altitude 1000 m above sea level.
The machine must be placed indoors, in a well-ventilated place free of corrosive vapours (acid vapours, saline mist, etc).
Special executions, for different environmental conditions or for outdoor use are available on request.

The Hoist In Detail

Please see the images to the right

1. Reduction Gear
Epicyclic crown wheel with heat-treated high-strength steel gearing supported by oil-bath lubricated ball bearings. Noise level at full load is less than 85 db. The aluminium casing is finned externally for more effective heat dissipation by radiation.

2. Self-braking electrical motor
The axial movement of the tapered brake ensures a fast braking action that remains reliable upon time accrual [RES. 4.1.2.1 c - Machinery Directive]. Brake lining is asbestos-free. The motor is available in two versions: a single polarity version for one-speed hoists, and a pole change version for two-speed hoists.

3. Chain
The chain is gauged and made of high-strength steel rod having an ultimate tensile strength of 80 kg/mm2, and ultimate elongation higher than 10%. The applicable safety coefficient is always better than 5 [RES. 4.1.2.4 - Machinery Directive]. The heat and galvanising treatments applied to the chain ensure high resistance to wear, aging and corrosion.

4. Load Sprocket
The load sprocket is heat treated, and has five pockets. The pockets are machined by use of recision machinery. The sprocket drives the chain, and ensures optimized chain motion.

5.Chain Guide (inserter/extractor)
This component provides for insertion and extraction of the chain links into and from the pockets of the load sprocket, both in ascent and descent. [RES. 4.1.2.6 - Machinery Directive].

6. Load Hook
The hook, made of high strength forged steel, is fitted with a safety device [RES. 4.1.2.6 - Machinery Directive], and rotates on a thrust bearing.

7. Single Fall Bottom Block(1 Chain Fall Hoists)
The bottom block is the joining element between the chain and the hook. It is made of steel, and is equipped with a heat-treated large cross-section chain locking pin.

8.Two Falls Hookblock(2 Chain Fall Hoists)
Made of aluminium, completely closed, it is equipped with a high-resistance steel transmission reel, thermally treated, with pockets for the housing of the chain.

9. Chain Stops
The stops are fitted on both the ascending and descending sections of the chain. They act as limit switches of hook travel [RES. 4.1.2.6 a - Machinery Directive], and can be set as desired. They are made of forged steel, and are fitted with a shock-absorbing insert.

10. Clutch Device
The clutch is an emergency device that replaces the traditional electrical limit switches as chain full up and down stops. It also operates as an overload protection [RES. 4.2.1.4 - Machinery Directive]. The clutch discs are asbestos-free, and are pre-loaded through a set of Belleville washers. Dmk Electric Hoist Innards 2

11. Balancer
The balancer is connected to the clutch joint, and provides for correct hoist balancing. It absorbs the heat generated during clutch operation.

12. New Brake DMK 2-3-4
The new brake shoe fitted in hoist sizes 2-3 and 4 is manufactured with a fan for more efficient cooling of the brake and motor. The high degree of inclination of the brake surface allows for optimal braking in the most arduous working conditions. Brake movement is simply carried out by the adjustment of the external brake ring.

13. Overload Device(2 Chain Fall Hoists)
Electromechanical, with a microswitch for one intervention threshold [RES. 4.2.1.4 - Enclosure I Machinery Directive ]. The overload device does not permit the hoist to be loaded with an overload exceeding 20% of its maximum capacity, by blocking the control circuit of the lifting control device.

14. Suspension
It is produced with an eyebolt suspension; are available on request, the executions with hook suspension or by eyebolt 90° version for longitudinal positioning of the hoist.

Lifting Limit Switches
Included in the supply for the 2 chain fall hoists and available, on request, for 1 chain fall hoists, they limit the hook’s ascent and descent run [RES. 4.1.2.6 a) - Enclosure 1 Machinery Directive]. They are made of two precision microswitches which function according to the principle of “slow positive opening” and work on the auxiliary circuit of the control device of the lifting motor.

Chain Box
The chain box is available in several sizes as a function of hook travel. It is made of shock-resistant plastics and is fitted with suspensions which ensure freedom of movement.

Eye Suspension Hoist


Capacity Max. (kg)	Size	Chain Falls	Type DMK	Hoist Weight (kg)	Overall Dimensions (mm)
Capacity Max. (kg)	Size	Chain Falls	Type DMK	Hoist Weight (kg)	A	A1	B	C	C1	C2	D	E	F	G	H	I
125	1	1	154C	23	285	23	253	355	19	177	120	138	80	70	14	27
125			132D/M	23	285	23	253	355	19	177	120	138	80	70	14	27
250			134C	23	285	23	253	355	19	177	120	138	80	70	14	27
250			112D/M	23	285	23	253	355	19	177	120	138	80	70	14	27
125	2		232C	33	320	23	268	438	19	237	135	160	92	70	14	27
250			234C/M	33	320	23	268	438	19	237	135	160	92	70	14	27
250			234D	33	320	23	268	438	19	237	135	160	92	70	14	27
500			214C/M	33	320	23	268	438	19	237	135	160	92	70	14	27
500			214D	33	320	23	268	438	19	237	135	160	92	70	14	27
250	3		332C	50	392	28	293	514	25	274	160	202	114	70	14	30
500			334C/M	50	392	28	293	514	25	274	160	202	114	70	14	30
500			334D	50	392	28	293	514	25	274	160	202	114	70	14	30
1000			314C/M	50	392	28	293	514	25	274	160	202	114	70	14	30
1000			314D	50	392	28	293	514	25	274	160	202	114	70	14	30
500	4		432C	80	483	32	332	583	27	317	200	245	146	70	20	35
1000			434C	80	483	32	332	583	27	317	200	245	146	90	20	35
1000			434D	80	483	32	332	583	27	317	200	245	146	90	20	35
1600			424L	80	483	32	332	583	27	317	200	245	146	90	20	35
2000			414C	80	483	32	332	583	27	317	200	245	146	90	20	35
2000			414D	105	483	32	332	583	27	317	200	245	146	90	20	35
3200		2	434L.I	105	670	25	395	583	50	317	200	432	71	90	25	-
3200			424D.I	105	670	25	395	583	50	317	200	432	71	90	25	-
3200			434L.J	105	670	25	395	583	50	317	200	432	71	90	25	-
3200			424D.J	105	670	25	395	583	50	317	200	432	71	90	25	-
4000			424L.J	105	670	25	395	583	50	317	200	432	71	90	25	-
4000			454D.J	105	670	25	395	583	50	317	200	432	71	90	25	-
3200			424L.K	105	670	25	395	583	50	317	200	432	71	90	25	-
3200			454D.K	105	670	25	395	583	50	317	200	432	71	90	25	-

Trolley Suspension Hoist


Push Travel Trolley (SM)								Geared Travel Trolley (CM)
DMK Size	Chain Falls	DMT Trolley Type	Hoist Trolley Weight (kg)	Overall Dimensions (mm)
DMK Size	Chain Falls	DMT Trolley Type	Hoist Trolley Weight (kg)	J	L	M	M1	ØN	O	O1	P	Q	R	S	ØT
1	1	SM2	29	340	100	236	54	52	72	-	20	-	-	-	M16
	1	EM3	58	355	135	362	-10	80	98	100(108)	54	260(280)	165	90	M14
	1	CM3	41	355	135	362	-10	80	98	-	54	240	108	-	M14
2	1	SM2	39	375	100	236	58	52	72	-	20	-	-	-	M16
	1	EM3	68	390	135	362	-6	80	98	100(108)	54	260(280)	165	90	M14
	1	CM3	51	390	135	362	-6	80	98	-	54	240	108	-	M14
3	1	SM3	62	456	135	362	-3	80	98	-	54	-	-	-	M14
	1	EM3	85	456	135	362	-3	80	98	100(108)	54	260(280)	165	90	M14
	1	CM3	68	456	135	362	-3	80	98	-	54	240	108	-	M14
4	1	SM4	105	560	160	402	-15	100	120	-	60	-	-	-	M20
	1	EM4	130	560	160	402	-15	100	120	110(118)	60	266(286)	165	96	M20
	1	CM4	115	560	160	402	-15	100	120	-	60	264	160	-	M20
	2	SM5	160	755	201	510	70	125	155	-	55	-	-	-	M24
	2	EM5	190	755	201	510	70	125	155	130(130)	55	295(295)	208	110	M24
	2	CM5	170	755	201	510	70	125	155	-	55	340	198	-	M24

Motorised (Electric) Travel Trolley (EM)

Low Headroom Trolley Suspended Hoist


Low Headroom Motorised Travel Trolley
DMK Size	Capacity Max. (kg)	DMT Trolley Type	Hoist Trolley Weight (kg)	Overall Dimensions
DMK Size	Capacity Max. (kg)	DMT Trolley Type	Hoist Trolley Weight (kg)	A	B	H	H1	J	L	M	M1	ØN	O	O1	P	Q	R	S	ØT	ØT1
1	250	SM3+SM3	60	170	228	295	417	240	135	742	380	80	98	-	54	-	108	-	M14	M16
1	250	SM3+EM3	75	170	228	295	417	240	135	742	380	80	98	100(108)	54	260(280)	108	160	M14	M16
2	500	SM3+SM3	67	176	240	315	455	265	135	762	400	80	98	-	54	-	108	-	M14	M16
2	500	SM3+EM3	80	176	240	315	455	265	135	762	400	80	98	100(108)	54	260(280)	108	160	M14	M16
3	1000	SM3+SM3	100	190	275	365	510	327	135	812	450	80	98	-	54	-	108	-	M14	M16
3	1000	SM3+EM3	115	190	275	365	510	327	135	812	450	80	98	100(108)	54	260(280)	108	160	M14	M16
4	2000	SM4+SM4	155	205	310	440	637	400	160	902	500	100	120	-	60	-	118	-	M20	M24
	2000	SM4+EM4	170	205	310	440	637	400	160	902	500	100	120	110(118)	60	266(286)	118	170	M20	M24
	4000	on request	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
	4000	on request	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

Suspension Type

Capacity

Lifting Speed

Pendant Length (m)

(min:2) (2 included in price)

Height of Lift (m)

(min:3) (3 included in price)

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Quantity

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A High level of Quality is guarenteed and checked by Donati's company quality control system according to UNI EN ISO 9001: 1994 Standards.

The Manufacturer uses the most advanced technology based on production processes and allows the putting together of totally reliable and technically innovative machines.