SUNUS TECH CO., LTD.

DMU (Dear Reducer)

特別設計的機械結構，消除減速機內部及齒輪，齒條間的間隙，徹底解決一般減速機驅動齒輪齒條時，針對製造或安裝上的誤差所產生的背隙，給予彌補或消除。

可由單顆伺服馬達驅動，在電腦參數的設定上，比使用雙顆伺服馬達的電機消隙更為容易。

Features

Fully enclosed gap elimination

The specially designed mechanical structure eliminates the gaps inside the reducer and between the gears and racks, completely solving the problem of backlash caused by manufacturing or installation errors when a general reducer drives a gear and rack, thus compensating for or eliminating it.

Cost saving

By using only a single servo motor drive, the backlash elimination effect of dual servo motors and drivers can be achieved, thus reducing the cost of the NC controller.
Because backlash is eliminated, the machining tool path is stable and its lifespan is increased.

Easy to set up

The fully enclosed mechanical backlash elimination is driven by a single servo motor, making it easier to set computer parameters than the backlash elimination using dual servo motors.

This results in better surface smoothness and precision.

After the backlash is eliminated, the tool path becomes stable, resulting in better surface smoothness and accuracy.

Super torque

Large, high-quality tapered roller bearings enable the output shaft to withstand greater axial and radial loads, as well as ultra-high torque and rigidity, making them suitable for a wide range of applications.

High starting performance

The integrated output gear shaft design, with specially made high-strength gears with fewer teeth, allows the servo motor to be selected in a smaller size to obtain minimum starting torque and greater rigidity.

High positioning accuracy

Precision gear grinding results in smooth tooth surfaces and accurate tooth profiles.
The gearbox and inner ring gear adopt an integral structural design and are made of special alloy steel, which has high stability.

Long lifespan, low noise

The gears are precision ground and undergo deep carburizing hardening treatment, followed by precision tooth surface grinding, resulting in high gear rigidity, smooth tooth surface, and excellent wear resistance, which can extend service life and reduce noise.
Even after prolonged operation and use, it still maintains its gap-eliminating function.

Product Specifications

DMU Technical Data (Dual-band 32/40/44/55/66/88/110 ratio)

Specification		Reduction ratio	DMU140	DMU160	DMU180	DMU210	DMU240
Maximum acceleration torque (1) T2B	Nm	32 / 40	1120	1770	2500	5920	9395
Maximum acceleration torque (1) T2B	Nm	44 / 55 / 66 / 77 / 88 / 110	950	1545	2220	5430	7950
Emergency stop torque (2) T2Not	Nm	32 / 40	2320	3650	5150	12800	19300
Emergency stop torque (2) T2Not	Nm	44 / 55 / 66 / 77 / 88 / 110	1950	3140	4330	10990	16110
Rated output torque T2N	Nm	32 / 40	735	1150	1645	3890	6180
Rated output torque T2N	Nm	44 / 55 / 66 / 77 / 88 / 110	625	1000	1460	3570	5230
Reduction ratio i		Two-stage	32 / 40 / 44 / 55 / 66 / 77 / 88 / 110
Rated input speed n1N	rpm	32~110	3000	3000	3000	2500	2000
Maximum input speed n1Max	rpm	32~110	4000	4000	4000	3500	3500
Efficiency under full load	%	32~110	≥ 93
Service life LH2	h	32~110	20000
weight	kg
Moment of inertia	kg‧cm2	32~110	39.77	42.8	95.73	228.5	360

Output gear data

Specification		DMU140	DMU160	DMU180	DMU210	DMU240
helical gear (Helix angle 19° 31'42")	Modulus	M4	M4	M5	M6	M8
helical gear (Helix angle 19° 31'42")	Number of teeth	15T	18T	15T	18T	15T
spur gear	Modulus	M4	M4	M5	M6	M8
spur gear	Number of teeth	16T	19T	16T	19T	16T
Pitch circle diameter	helical gear	Ø63.66	Ø79.39	Ø79.58	Ø114.59	Ø127.32
Pitch circle diameter	spur gear	Ø64	Ø76	Ø80	Ø114	Ø128
circumference	helical gear	200	240	250	360	400
circumference	spur gear	201.06	238.76	251.33	358.14	402.12
Transposition coefficient	helical gear	0.355	-	0.3723	-	0.355
Transposition coefficient	spur gear	0.475	-	0.45	-	0.4375

(1) This table applies to a startup frequency of 1000 times/hour or less. If the frequency exceeds this, please consult our company.
(2) It can be used 1,000 times within the service life.
(3) If the reduction ratio you require is not listed in the table, please consult our company.
(4) For continuous use, please consult our company.

External dimensions

DMU dimensions (dual-segment 32 / 40 / 44 / 55 / 66 / 77 / 88 / 110 ratio) [mm]

Specification	DMU140	DMU160	DMU180	DMU210	DMU240
Number of segments	2	2	2	2	2
H1	220	270	320	380	420
H2	32.5	35	35	50	60
H3	155	200	250	280	300
H4	45	60	70	100	90
H5	65	75	90	90	120
H6	130	150	180	180	twenty four
L1	470	530	600	720	815
L2	405	460	530	620	695
L3	32.5	35	35	50	60
L4	202.5	230	265	310	347.5
L5	189	207	240	270	320
L6	353	386	458	512	600
W1	43	43	54	65	88
W2	3	6	-	-	4
W3	62	64	68	86.5	115
W4	50	60	80	90	90
W5	55	65	75	105	95
W6	110	130	150	210	180
W7	132.5	157.5	192.5	247.5	232.5
W8	309	336.5	385	480.5	519.5
※W9	51.5	52	61	56	48
※W10	422.5	452.5	514	623	682.5
※W11	10	15	15	10	10
※W12	82	82.5	98	85	83.5
※W13	176	176	176	176	190
D1(F7) max.	38	38	42	48	55
※D2	114.3	114.3	114.3	114.3	180
D3	9.5	9.5	11.5	13.5	13.5
※D4	200	200	200	200	215
M1	M12*P1.75	M16*P2	M20*P2.5	M20*P2.5	M20*P2.5
※M2	M12*P1.75	M12*P1.75	M12*P1.75	M12*P1.75	M12*P1.75

*The dimensions indicated by this symbol may vary depending on the servo motor being connected.
*Our products are constantly being researched and developed. The dimensions shown in the table above are intended to be accurate; however, in case of discrepancies, the actual product shall prevail. For precise dimensions, please contact our company.

DMU External Dimensions (Input Shaft Type) (Dual-section 32 / 40 / 44 / 55 / 66 / 77 / 88 / 110 ratio) [mm]

Specification	DMU140	DMU160	DMU180	DMU210	DMU240
Number of segments	2	2	2	2	2
H1	220	270	320	380	420
H2	32.5	35	35	50	60
H3	155	200	250	280	300
H4	45	60	70	100	90
H5	65	75	90	90	120
H6	130	150	180	180	twenty four
L1	470	530	600	720	815
L2	405	460	530	620	695
L3	32.5	35	35	50	60
L4	202.5	230	265	310	347.5
L5	189	207	240	270	320
L6	353	386	458	512	600
W1	43	43	54	65	88
W2	3	6	-	-	4
W3	62	64	68	86.5	115
W4	50	60	80	90	90
W5	55	65	75	105	95
W6	110	130	150	210	180
W7	132.5	157.5	192.5	247.5	232.5
W8	292.5	313	366	450.5	493.5
W9	88	88	102	115	111
W10	422.5	465	536	652	719.5
W11	73	73	83	85	85
W12	70	70	80	82	82
D1(k6) max.	40	40	42	50	55
D2	9.5	9.5	11.5	13.5	13.5
M1	M12*P1.75	M16*P2	M20*P2.5	M24*P3	M30*P3.5

*Our products are constantly being researched and developed. The dimensions shown in the table above are intended to be accurate; however, in case of discrepancies, the actual product shall prevail. For precise dimensions, please contact our company.

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