Timing-Belt Reverse Unit 8 80 R25 with Bore D34

Timing-Belt Reverse Unit 8 80 R25 with Bore D34


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Special features:
item products are based on different modular dimensions and their associated system grooves. Profiles from Lines 5, 6, 8, 10 and 12 each need corresponding sizes of fasteners. The profiles in Line X feature a Line 8 system groove but have a particularly flat surface with minimum curve radii that make them ideal for building sealed constructions.
Components that are RoHS-compliant contain no dangerous substances such as lead or cadmium. EC Directive 2002/95/EC (RoHS 1) restricts the use of certain substances in electronic devices and components. These include batteries, etc.
All substances are registered according to the REACH regulation. REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) ensures that users have accurate information on the type and properties of operating materials, lubricants, etc. that they might come into contact with.
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on application

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Timing-Belt Reverse Unit 8 80 R25 with Bore D34


line 8
Delivery Unit
1 set
Timing-Belt Reverse Unit 8 80 R25 with Bore D34


Timing-Belt Reverse Unit, die-cast zinc, black
Ball-bearing timing pulley with ø 34 H7 bore
Hub length: 29 mm
One revolution equivalent to 280 mm
Effective radius re = 44.6 mm
Friction torque at 1‰ preload on timing belt:
(Emergence dimension 40) TF = 1.05 Nm
(Emergence dimension 80) TF = 0.55 Nm
Max. load: TD = 52 Nm
Belt length inside Reverse Unit in case of
90° reversal: 190 mm
180° reversal (emergence dimension 40): 360 mm
180° reversal (emergence dimension 80): 340 mm
2 Universal Fasteners 8
2 Button-Head Screws ISO 7380 M8x30, St, bright zinc-plated
1 special T-Slot Nut GS M8
Pitch p = 10 mm Number of teeth n = 28
Notes on Use and Installation
Creating customised Linear Units has never been easier! item Timing-Belt Reverse Units provide a reliable basis for linear axes using a timing-belt drive. The models with a D12, D15 or D34 bore are designed to support a backlash-free connection to item Motors and Gearboxes without requiring hub machining.
The expanding hub couplings of Drive Sets ZU and Drive Set 8 D40/D15 can create a friction-based connection between all drive components. Everything fits together seamlessly without the need for machining. The item Automation System offers a wide selection of Gearboxes and servomotors with absolute encoders or resolvers, which helps reduce the complexity of solutions and create dependable Linear Units with a fast timing-belt drive.
The universal Drive Sets from item are used to connect virtually any motor. Their coupling bore can be enlarged to match the drive shaft.
The item Timing-Belt Reverse Units have been optimised for different profile and timing belt widths. The timing belt can be redirected by 90° or 180° inside the casing.
The durable timing pulley, the robust casing and the use of T-Slot Nuts for installation ensure things run smoothly even when under load.


Assembly instruction(1 MB)
Timing-Belt Reverse Unit 8 80 R25 with Bore D34


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eCl@ss 4.0
eCl@ss 4.1
eCl@ss 5.0
eCl@ss 5.1
eCl@ss 6.0.1
eCl@ss 7.1
eCl@ss 8.0
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