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Helical Gearboxes

Parallel Shaft Helical Gear Units

Parallel Shaft Helical Gear Units

F series parallel shaft helical gear units are designed by optimum design. The center distance of reducer is arranged in parallel. It has the characteristics of small size, light weight, large transfer torque, smooth start, low loss, flexible input and output, positive and reverse start, etc. It is very suitable for use when installation space is limited. It can be combined with a variety of reduction and transmission units.
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Parallel Shaft Helical Gear Units

1.Product description

For SR F series parallel shaft helical gear units,the boxes are cast precisely by high steel material and processed at processing center;the gears are made of high-quality alloy steel,are treated with surface hardening and toothed;and the key parts are imported.

Technical parameters:

Power:0.12-200 Kw

Torque:200-18000 N.m

Transmission rate:4-31500

Material of gears and bearings:20CrMnTi/40Cr

Hardness of gears and bearings:58~62 HRC/217~255HB

Gear handling method:Carburizing and quenching treatment

                  Hardness of Tooth Surface 58~62 HRC

                  Core Hardness 30~42 HRC

Brand Name:SR



The whole parallel shaft helical gear units are small in volume,with great load-carrying capacity,steady running,low noise and high efficiency.SR parallel shaft helical gear units have reached the advance international level,can replace the same kind of products imported.

3.Applicable conditions
 1).Max.speed of high-speed shaft shall not be more than 1500r/min.
 2).Peripheral speed of gear shall not be more than 10m/s.
 3).Working environmental temperature is -40~+45°C.
 4).Can be used for run in both positive and negative direction.






5.Application area

Motor, Machinery, Agricultural Machinery,Food,Health,Textile,Environment protection,chemical industry


6.Terms of Payment

30% by T/T in advance.

7.Competitive Advantages:

 1).Quick shipping,factory competitive price      

 2).Our advantage is we can understand the drawing with tolerance,material and process way correctly.and we have experienced and professional team control the quality.

8.Packaging & Delivery

Packing details: To be packed in wooden cases.

Delivery time: Within 25-35 working days after we have received the full payment. 

包装图片 1工厂包装0_副本

9. Service Factor:


In this formula:

    Mamax=maximum permissible output torque(N.m)

    Na=Output speed(1/min)

    Pm=Rated power of driving motor(Kw)

Dimension tolerances:

 a.Shaft height

h≤250mm → -0.5mm           h>250mm → -1mm

 b.Shaft extensions

  Ⅰ.Diameter tolerances        d ≤50mm → ISO K6       d >50mm → ISO m6

  Ⅱ.Center holes of shaft terminal

    >13-16mm → M5        >16-21mm → M6          >21-24mm → M8

    >24-30mm → M10      >30-38mm → M12        >38-50mm → M16

    >50-85mm → M20      >85-130mm → M24      >130mm   → M30

 c.Diameter tolerance of hollow shaft       d → ISO H7

 d.Flange centering shouler tolerance       b → ISO h7

 Welcome trial order!!!!!!

10. Product Pictures


Installation type and Mounting positions:



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12. Our Factory

13. Our Certificate

sts certificate.jpg

14. FAQ

1. Q:What information should be given,if I buy gearboxes from you?

    A:Rated power,gearboxes ratio,input speed,mounting position,more details,better.  

2. Q:Can I visit your factory?

    A: Yes. SR people welcome friends all over the world to visit our factory. We can help you apply for invitation, make travel arrangement and so on.

3. Q:How much does it cost to ship to my country?

    A:It depends on seasons. Fee is different in different seasons. You can consult us at all times.

4. Q: Do you sell motors?

    A:We have stable motor suppliers who have been cooperating with us for a long time.They can provide motors with high quality.

15. How to contact us?


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