H-DR BRECOFLEX® polyurethane timing belt

Version:

  • Reinforced back of the belt, 2.18 mm larger belt width
  • 1/2" = 12,7 mm
  • Preferred belt widths: 12.7, 19.1, 25.4, 38.1, 50.8, 76.2 101.6 mm
  • In-between widths, larger widths and other dimensions are possible on request

Available endless lengths:

  • For standard delivery lengths refer to table
  • Under 1,066.8 mm: further lengths on request
  • 1,066.8 mm and over: any number of teeth available (request minimum purchase amount for intermediate lengths)
  • Over 16,002.0 mm: please enquire

Please consider our warranty.

standard storage goods
Length Teeth
[mm]
CAD 1066,8 84 CAD
CAD 1134 89 CAD
CAD 1219,2 96 CAD
CAD 1295,4 102 CAD
CAD 1371,6 108 CAD
CAD 1447,8 114 CAD
CAD 1524 120 CAD
CAD 1600 126 CAD
CAD 1676,4 132 CAD
CAD 1778 140 CAD
CAD 1905 150 CAD
CAD 2032 160 CAD
CAD 2159 170 CAD
CAD 2286 180 CAD
CAD 2540 200 CAD
CAD 2794 220 CAD
CAD 3175 250 CAD
CAD 3556 280 CAD
CAD 4318 340 CAD
CAD 5080 400 CAD
CAD 5842 460 CAD
CAD 6604 520 CAD
CAD 7620 600 CAD

Belt width b [cm]

\begin{align}
b& = {F_U \over {z_e \cdot F_{Uspez}}} && F_U [N] \\
b& = {100 \cdot M \over {z_1 \cdot z_e \cdot M_{spez}}} && M [Nm]\\
b& = {1000 \cdot P \over {z_1 \cdot z_e  \cdot P_{spez}}} && P [kW]
\end{align}

Load bearing characteristics of the drive

when belt width [cm] is

\begin{align}
F_{U}& = {F_{Uspez} \cdot z_e \cdot b} &&[N]\\
M& = {{M_{spez} \cdot z_1 \cdot z_e \cdot b} \over {100}} &&[Nm]\\
P& = {{P_{spez} \cdot z_1 \cdot z_e \cdot b} \over {1000}} &&[kW]
\end{align}

Number of teeth in mesh

\begin{align}
 z_{e max}& = {12}\\
 z_e& = {{{z_1} \over {180}} \cdot \arccos{{t \cdot (z_2 - z_1)} \over {2\pi \cdot a}}}\\
 \end{align}

 

1. Tooth shear strength

specific belt tooth strength

Rotational speed n [rpm] Fuspez [N/cm] Mspez [Ncm/cm] Pspez [W/cm] Rotational speed n [rpm] Fuspez [N/cm] Mspez [Ncm/cm] Pspez [W/cm]
0 44,000 8,900 0,000 2000 22,100 4,470 9,370
20 42,700 8,640 0,181 2200 21,500 4,340 10,000
40 41,600 8,410 0,352 2400 20,900 4,220 10,600
60 40,700 8,220 0,516 2600 20,300 4,110 11,180
80 39,800 8,050 0,674 2800 19,810 4,000 11,740
100 39,100 7,890 0,827 3000 19,330 3,910 12,270
200 36,100 7,300 1,530 3200 18,880 3,820 12,790
300 34,100 6,890 2,160 3400 18,450 3,730 13,280
400 32,500 6,560 2,750 3600 18,050 3,650 13,760
500 31,100 6,300 3,300 3800 17,680 3,570 14,220
600 30,000 6,070 3,810 4000 17,320 3,500 14,660
700 29,100 5,880 4,310 4500 16,490 3,330 15,700
800 28,200 5,710 4,780 5000 15,740 3,180 16,660
900 27,500 5,550 5,230 5500 15,070 3,050 17,550
1000 26,800 5,410 5,670 6000 14,460 2,920 18,360
1100 26,200 5,290 6,090 6500 13,890 2,810 19,110
1200 25,600 5,170 6,500 7000 13,360 2,700 19,800
1300 25,100 5,060 6,890 7500 12,870 2,600 20,400
1400 24,600 4,960 7,280 8000 12,420 2,510 21,000
1500 24,100 4,870 7,650 8500 11,990 2,420 21,600
1600 23,700 4,780 8,010 9000 11,580 2,340 22,100
1700 23,200 4,700 8,360 9500 11,190 2,260 22,500
1800 22,900 4,620 8,710 10000 10,830 2,190 22,900
1900 22,500 4,540 9,040

Rotational speeds over 10000 rpm and/or belt speeds over 80 m/s are in need of a special drive design. Please request for our advice.

2. Tension cord strength [N]

permitted tensile force of the belt Fzul

Belt width b [mm] 12,7 19,1 25,4 38,1 50,8 76,2 101,6
BRECOFLEX H 800 1300 1800 2800 3800 5800 7900
BRECOFLEX H-DL 800 1300 1800 2800 3800 5800 7900
BRECOFLEX H-T 800 1300 1800 2800 3800 5800 7900
BRECOFLEX H-DR 800 1300 1800 2800 3800 5800 7900

3. Belt weights [kg/m]

Belt width b [mm] 12,7 19,1 25,4 38,1 50,8 76,2 101,6
BRECOFLEX H 0,053 0,079 0,108 0,161 0,216 0,324 0,432
BRECOFLEX H-DL 0,064 0,097 0,130 0,196 0,262 0,394 0,527
BRECOFLEX H-T 0,082 0,124 0,165 0,249 0,333 0,499 0,668
BRECOFLEX H-DR 0,085 0,128 0,171 0,258 0,345 0,518 0,692

4. Flexibility

Minimum numbers of teeth, minimum diameter

( X ) without contraflexure

( X X ) with contraflexure

Belt type Number of teeth zmin ( X ) Tension roller dmin [mm] ( X ) Number of teeth zmin ( X X ) Tension roller dmin [mm] ( X X )
BRECOFLEX H 14 60 20 80
BRECOFLEX H-DL 20 80 20 80
BRECOFLEX H-T 20 80 20 80
BRECOFLEX H-DR 20 80 20 80

H-DR BRECOFLEX® Polyurethan-Zahnriemen