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  • Worm gear sets
    • Center distance 17
    • Center distance 22
    • Center distance 25
    • Center distance 31
    • Center distance 33
    • Center distance 35
    • Center distance 40
    • Center distance 50
    • Center distance 53
    • Center distance 63
    • Center distance 65
    • Center distance 80
  • Planetary gearbox
    • GSD
    • GSB
    • GSBL
    • GSN
    • GFE

Service

Produkt-Support:

Schneckenradsätze

 +49 7657 88 301
gears@framo-morat.com

Planetengetriebe

 +49 7657 88 303
drives@framo-morat.com


Shop-Support

 +49 7657 88 304
shop@framo-morat.com


Online contact

Custom solutions

Custom worm gear sets and planetary gears are manufactured according to special requirements for material and shape.

Worm gear sets

 

Planetary gears
  • Home
  • Worm gear sets
    • Center distance 17
    • Center distance 22
    • Center distance 25
    • Center distance 31
    • Center distance 33
    • Center distance 35
    • Center distance 40
    • Center distance 50
    • Center distance 53
    • Center distance 63
    • Center distance 65
    • Center distance 80
  • Planetary gearbox
    • GSD
    • GSB
    • GSBL
    • GSN
    • GFE

Service

Produkt-Support:

Schneckenradsätze

 +49 7657 88 301
gears@framo-morat.com

Planetengetriebe

 +49 7657 88 303
drives@framo-morat.com


Shop-Support

 +49 7657 88 304
shop@framo-morat.com


Online contact

Custom solutions

Custom worm gear sets and planetary gears are manufactured according to special requirements for material and shape.

Worm gear sets

 

Planetary gears
  1. shop.framo-morat.com
  2. Worm gear sets
  3. Center distance 33
Template: list.tpl
Template: c4s_subcategorylist.tpl

Center distance 33 

  • 100
Center distance 33
Center distance 33
  • Technical Documentation
  • More information
  • Additional information

    Materials

    ° Since July 21, 2021, the exceptions of the EU Directive 2011/65/EU (RoHS II) regarding the use of lead as an alloying element in steel (Exception 6a in Annex III) and in copper alloys (Exception 6c in Annex III) expire . In order to give our customers legal certainty with regard to the requirements of the RoHS directive, we have decided to gradually convert our standard worm gear sets to alloys with a lead content of ≤ 0.1% by weight (worm: 11SMn30 / worm wheel: CuZn37Mn3Al2Si). You can recognize the worm gear sets that have already been converted by the new item numbers without spaces (e.g. new: R17U80B / e.g. old: R 17U 80B).

    Plastic worm gears
    Owing to their poor thermal conductivity, plastic worm gears are only suitable for low sliding speeds of < 1.5 m/s and medium tooth flank loading. The worm must be hardened and must have ground flanks.
    Plastic worm gears have around 60% of the torque capacity of comparable bronze worm gears (this applies for use with mineral grease).

    Bronze worm gears
    Cu Sn 12 DIN 1705
    Relatively soft material with good wear resistance: suitable for high sliding speeds.

    Cu Sn 12 Ni DIN 1705
    Relatively soft material with very high wear resistance: suitable for very high sliding speeds.

    CuAl10Fe3 Mn2 DIN 17665 / 17672
    Relatively hard anti-friction materials for high loads and relatively low rotational speeds.

    Please find more details at our Worm gear set catalog.

    Self-locking

    Self-locking is affected by the lead angle, the roughness of the flanks, the sliding speed, the lubricant and increases in temperature. Self-locking can be dynamic or static.

    Dynamic self-locking: lead angle up to 3° with grease lubricant; lead angle up to 2.5° with synthetic oil lubricants.
    Static self-locking: lead angle from 3° to 5° with grease lubricant; lead angle from 2.5° to 4.5° with synthetic oil lubricants.
    No self-locking facility is available for lead angles over 4.5° or 5°.

    Jarring and vibration can prevent gears from self-locking. Self-locking can also be adversely affected if sliding conditions are particularly good. This can be caused by a number of factors relating to the lubricant, sliding speed and loading. For this reason we are unable to assume any warranty obligations for self-locking.

    Installing the worm gear

    The reference surface tolerances will determine the lateral positioning of the worm gears. The lateral tolerance “c” must not exceed 0.15 mm for any centre distance.


    Turn gear wheel in direction of arrow

    Correct marking

    Turn gear wheel in direction of arrow

    You can tell if the worm gear is in the correct axial position by checking the position of the tooth contact pattern when the gear wheel is installed. If possible the tooth contact pattern should be towards the run-out side. When the gear is turned in the other direction (reverse operation) the tooth contact pattern should be towards the centre.

    Efficiency

    The efficiency of the worm gear set generally depends on the following parameters:

    • Lead angle of the worm
    • Sliding speed
    • Lubricant
    • Surface quality
    • Installation conditions
    he larger the centre distance, the greater the degree of efficiency. Sliding bearings are often used with gears with smaller centre distances to save space and reduce costs. The sliding bearings have higher coefficients of friction, which can have a considerable effect on the overall efficiency of the gear. Efficiency data can be obtained from the manufacturer or our catalogue.

    Additional information to efficiency factors are available in our worm gear sets catalog.

    Helical gearing

    A helical gearing is a spur-type gearing which is inclined at the same angle as the lead angle of the worm. As the contact pattern is linear, a lower torque than that of a worm-type gearing is transmitted and the service life is reduced.

    The information on this website was generated with the greatest possible care and checked for accuracy. No liability will be accepted for any inaccurate or incomplete data.
  • CAD data
  • request
Legend
i = gear ratio da1 = tip diameter (worm) T2 = output torque
?m = Lead angle z2 = No. of teeth (worm gear)
MF = mineral grease
mn = Normal module dm2 = pitch diameter (worm gear)
MÖ = mineral oil / synthetic grease
z1 = number of threads (worm)
dA = max. diameter (worm gear) SÖ = synthetic oil
dm1 = pitch diameter (worm) – –
  • 100
Center distance 33 Worm Worm Gear T2 [Nm]
Type Art. No. Cust.Mat.No. i ym mn z1 dm1 da1 z2 dm2 da MF MÖ SÖ Action
worm S33U3° 3,5:1 25°57' 1.75 6.0 24.0 27.5 - - - 10.1 12.1 15.1
worm wheel R33U3B° 3,5:1 25°57' 1.75 - - - 21.0 42.0 47.0 10.1 12.1 15.1
worm S33U5° 5:1 20°50' 2.0 4.0 22.5 26.5 - - - 10.6 12.7 15.9
worm wheel R33U5B° 5:1 20°50' 2.0 - - - 20.0 43.5 49.0 10.6 12.7 15.9
worm S33U7° 7:1 15°32' 1.5 4.0 22.4 25.4 - - - 12.2 14.6 18.3
worm wheel R33U7B° 7:1 15°32' 1.5 - - - 28.0 43.6 48.0 12.2 14.6 18.3
worm S33U10° 10:1 13°10' 1.5 3.0 19.75 22.75 - - - 13.3 16.0 19.9
worm wheel R33U10B° 10:1 13°10' 1.5 - - - 30.0 46.25 51.0 13.3 16.0 19.9
worm S33U11° 11,33:1 10°42' 1.3 3.0 21.0 23.6 - - - 13.3 16.0 19.9
worm wheel R33U11B° 11,33:1 10°42' 1.3 - - - 34.0 45.0 49.2 13.3 16.0 19.9
worm S33U12° 12:1 11°14' 1.9 2.0 19.5 23.3 - - - 13.5 16.2 20.2
worm wheel R 33U 12B 12:1 11°14' 1.9 - - - 24.0 46.5 52.0 13.5 16.2 20.2
worm S 33U 14 14:1 7°20' 1.5 2.0 23.5 26.5 - - - 11.4 13.7 17.1
worm wheel R33U14B° 14:1 7°20` 1.5 - - - 28.0 42.5 45.5 11.4 13.7 17.1
worm S33U15° 15:1 8°25' 1.5 2.0 20.5 23.5 - - - 13.0 15.6 19.5
worm wheel R33U15B° 15:1 8°25' 1.5 - - - 30.0 45.5 50.0 13.0 15.6 19.5
worm S 33U 16 16:1 10°1' 1.5 2.0 17.24 20.24 - - - 14.0 16.8 21.0
worm wheel R33U16B° 16:1 10°1' 1.5 - - - 32.0 48.76 53.0 14.0 16.8 21.0
worm wheel R33U17B° 17:1 9°3' 1.4 - - - 34.0 48.2 52.5 14.2 17.0 21.3
worm S33U18° 18:1 6°57' 1.25 2.0 20.65 23.15 - - - 12.6 15.1 18.9
worm wheel R33U18B° 18:1 6°57' 1.25 - - - 36.0 45.35 49.2 12.6 15.1 18.9
worm S33U20° 20:1 6°43' 1.15 2.0 19.66 21.96 - - - 12.7 15.2 19.0
worm wheel R33U20B° 20:1 6°43' 1.15 - - - 40.0 46.34 50.5 12.7 15.2 19.0
worm S 33U 24 24:1 5°27' 1.9 1.0 20.0 23.8 - - - 13.2 15.8 19.8
worm wheel R33U24B° 24:1 5°27' 1.9 - - - 24.0 46.0 51.0 13.2 15.8 19.8
worm S 33U 28 28:1 3°36' 1.5 1.0 23.9 26.9 - - - 11.2 13.4 16.8
worm wheel R33U28B° 28:1 3°36' 1.5 - - - 28.0 42.1 46.6 11.2 13.4 16.8
worm S33U30° 30:1 4°8' 1.5 1.0 20.85 23.85 - - - 12.7 15.2 19.0
worm wheel R33U30B° 30:1 4°8' 1.5 - - - 30.0 45.15 50.0 12.7 15.2 19.0
worm S 33U 32 32:1 4°50' 1.5 1.0 17.8 20.8 - - - 13.5 16.2 20.2
worm wheel R 33U 32B 32:1 4°50' 1.5 - - - 32.0 48.2 52.5 13.5 16.2 20.2
worm S 33U 38 38:1 3°55' 1.25 1.0 18.28 20.76 - - - 13.9 16.7 20.8
worm wheel R33U38B° 38:1 3°55' 1.25 - - - 38.0 47.74 51.6 13.9 16.7 20.8
worm S33U50° 50:1 2°27' 0.9 1.0 21.0 22.8 - - - 10.0 12.0 15.0
worm wheel R33U50B° 50:1 2°27' 0.9 - - - 50.0 45.0 48.0 10.0 12.0 15.0
worm S33U17° 17:1 9°3' 1.4 2.0 17.8 20.6 - - - 14.2 17.0 21.3
worm S33U56° 56:1 2°10' 0.8 1.0 21.15 22.75 - - - 10.1 12.1 15.1
worm wheel R33U56B° 56:1 2°10' 0.8 - - - 56.0 44.85 48.0 10.1 12.1 15.1
worm S33U60° 60:1 2°33' 0.8 1.0 17.96 19.56 - - - 11.4 13.7 17.1
worm wheel R33U60B° 60:1 2°33' 0.8 - - - 60.0 48.04 51.5 11.4 13.7 17.1
worm S 33U 72 72:1 1°30' 0.6 1.0 22.8 24.0 - - - 8.4 10.01 12.6
worm wheel R33U72B° 72:1 1°30' 0.6 - - - 72.0 43.2 46.0 8.4 10.01 12.6
worm S33U75° 75:1 1°41' 0.6 1.0 20.5 21.7 - - - 9.0 10.8 13.5
worm wheel R33U75B° 75:1 1°41' 0.6 - - - 75.0 45.5 48.0 9.0 10.8 13.5

° Since July 21, 2021, the exceptions of the EU Directive 2011/65/EU (RoHS II) regarding the use of lead as an alloying element in steel (Exception 6a in Annex III) and in copper alloys (Exception 6c in Annex III) expire . In order to give our customers legal certainty with regard to the requirements of the RoHS directive, we have decided to gradually convert our standard worm gear sets to alloys with a lead content of ≤ 0.1% by weight (worm: 11SMn30 / worm wheel: CuZn37Mn3Al2Si). You can recognize the worm gear sets that have already been converted by the new item numbers without spaces (e.g. new: R17U80B / e.g. old: R 17U 80B).

Right-hand screw made of steel, case-hardened HV 620 – 700.
Worm wheel made of CuZn37Mn3Al2PbSi-S40 or CuZn37Mn3Al2Si°. On request made of plastic or HGW 2083.

The output torque rating (T2) applies to the initial speed of 2800 rpm at the worm (shaft).
The efficiency values (see table in worm gear set catalog) are guidelines. The bearing, lubrication, speed, and installation, in addition to the lead angle, can influence efficiency.

Gears may be combined only with worms of the same axial distance and with the same transmission ratio.
Worms or worm gears from other manufacturers may not be paired with the counterpiece from Framo Morat. It is almost always necessary to adjust the toothing specifications.
All dimensions can be adapted upon request.

Is your desired gear set not available? Request your gear set!
Moderate quantities are usually available from stock, larger quantities are delivered in partial quantities or upon request.

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