PU Belt Welding, Clamping & Joining Equipment

Accurate polyurethane belt joining starts with identifying the belt before choosing the tool. Optibelt splicing tools provide equipment for preparing, positioning, welding & finishing compatible Optibelt PU round belts, V-belts & applicable special profiles.

Depending on the belt & frequency of use, the equipment includes the RS02 friction welding tool, SG02 welding tool, EErgo welding tool, FZ guide clamps, cutting tools, edge cutters & joining accessories.

For compatible Optibelt RR, HRR & KK belts, the practical selection sequence is straightforward:

► Identify the belt family
► Confirm its profile & dimensions
► Select the appropriate joining method
► Match the required welding tool
► Choose the correct clamp or clamping jaws
► Prepare & finish the joint with suitable tools

For wider drive requirements, explore Power Transmission or supporting components through Drive Accessories & Maintenance.

RS02 vs SG02 vs EErgo – Which Tool Suits the Job?

The three main Optibelt welding options serve different requirements.

RS02 – friction welding

The RS02 uses controlled friction heat to join compatible round sections, V-sections & special profiles. Optibelt identifies it as particularly suitable for RR & KK belts.

SG02 – occasional welding

The SG02 forms part of Optibelt's Basic service equipment & is intended for occasional joining work with compatible polyurethane RR, HRR & KK belts.

EErgo – regular welding

The temperature-controlled EErgo forms part of Optibelt's Premium service equipment & is intended for regular everyday use with compatible TPE & PU belts from the RR, HRR & KK families.

In practical terms:

► RS02 – consider when friction welding suits the compatible belt profile
► SG02 – consider for occasional PU-belt welding
► EErgo – consider where PU-belt welding is performed regularly

The belt type still comes first. Tool compatibility should be confirmed against the profile & dimensions being joined.

RS02 Uses Controlled Friction Heat

Rather than using an externally heated welding mirror, the Optibelt RS02 generates controlled friction heat at the joint.

Precision clamping jaws & an automatic zero position help position the belt ends during welding & reduce the risk of an offset seam.

Standard clamping-jaw options cover:

► Round belts from 6 mm to 20 mm diameter
► V-belts from 6 × 4 mm to 22 × 14 mm
► Various applicable special profiles

Additional jaws are available for other round & V-belt profiles, while specialised jaws can be produced for PU special profiles.

The RS02 equipment includes the friction welding machine, selected standard clamping jaws, Allen key, AS02 shears, SE02 edge cutter & carrying bag with hard-foam inlay.

The important distinction is that the RS02 is a friction-welding system, whereas the SG02 & EErgo use heated welding equipment.

SG02 Basic Equipment Suits Occasional Joining Work

For workshops that only need to splice compatible PU belts periodically, Optibelt positions its SG02 Basic equipment for occasional use.

The SG02 can be used with compatible polyurethane belts from the RR, HRR & KK families.

Its supporting equipment covers the main stages of the joining process:

► Cutting the belt to the required length
► Positioning the prepared belt ends
► Holding them with the appropriate guide clamp
► Heating the joining surfaces
► Completing the weld
► Finishing the resulting seam

The SG02 has a longer warm-up period than the EErgo, which is one reason the two tools suit different levels of workshop use.

Where PU belts only need to be joined as required rather than continuously, the SG02 provides the more occasional-use-oriented option.

EErgo Premium Equipment Is Designed for Regular Welding

When PU-belt joining forms a regular part of maintenance or production work, the EErgo moves the setup towards repeated use.

Optibelt describes the EErgo as an ergonomic, temperature-controlled welding tool. Its short warm-up time is particularly useful where several belt joints need to be completed rather than preparing equipment for a single occasional repair.

The Premium equipment can be used with compatible TPE & PU RR, HRR & KK belts.

It also incorporates the FZ01 Vario clamp, which uses quick clamping for compatible round & V-belt profiles. Exchangeable profile jaws extend the clamp's use to applicable special profiles.

For workshops carrying out repeated belt preparation or machinery servicing, an organised work area can also improve access to the welder, clamps & cutting equipment. Workstations & Workbenches provides related workshop equipment.

Match the FZ Clamp to the Belt Profile

The welding tool is only one part of the setup. The belt ends also need to be held in the correct position during joining.

Optibelt provides different FZ guide clamps according to belt size & profile.

FZ01

► Round belts up to 10 mm diameter
► V-belts up to profile 10

FZ02/3

► Round belts from 8 mm diameter
► V-belts up to profile 32

FZ01 Vario

► Quick-clamping design
► Suitable for compatible round & V profiles
► Exchangeable jaws for applicable special profiles
► Used with the Premium welding equipment

This is why identifying the belt before ordering the tooling matters. The welder may be suitable for the material, but the corresponding clamp or jaw also needs to accommodate the belt being joined.

For other workshop tooling requirements, Tool Maintenance Kit provides access to complementary maintenance equipment.

Clean Preparation Makes the Joint Easier to Control

PU-belt splicing begins with properly prepared belt ends.

Optibelt includes shears & edge-cutting tools within its welding equipment so the same setup can cover preparation before welding & seam finishing afterwards.

The Premium equipment includes shears with an adjustable angle stop for straight or angled cuts. Edge cutters are used to remove excess material from the finished seam where required.

The practical sequence is:

► Measure the required belt length
► Make the appropriate cut
► Position the ends in the correct clamp
► Complete the specified welding process
► Allow the joint to set as required
► Finish the seam with the appropriate tool

For broader cutting-tool requirements, Cutting Tools provides related workshop equipment.

Blade Sharpening 101 Sharpen Or Replace also covers the broader importance of keeping cutting equipment effective when accurate preparation matters.

HRR Hollow Round Belts Have a Separate Nipple-Joining Option

Compatible Optibelt HRR hollow round belts have another joining option that should not be confused with general PU-belt welding.

Optibelt provides connecting nipples specifically for compatible HRR hollow round belts. Pointed pliers are also available to assist with inserting the nipple into the hollow belt.

This is an HRR-specific mechanical joining arrangement.

It should not be treated as a general connector for solid RR round belts, KK V-belts or unrelated polyurethane profiles.

Before using a connecting nipple:

► Confirm the belt is a compatible HRR hollow round belt
► Match the nipple to the belt dimensions
► Prepare the belt ends correctly
► Use the appropriate insertion tool
► Confirm the completed connection suits the application

Where another Optibelt belt family is being joined, use the method specified for that belt rather than assuming an HRR nipple is suitable.

Keep the Correct Accessories With the Welding Tool

A complete splicing setup can include more than the welder itself.

Depending on the equipment being used, Optibelt provides supporting items such as:

► FZ guide clamps
► RS02 clamping jaws
► Cutting shears
► Edge cutters
► Replacement welding mirrors
► Table clamps
► Pointed pliers
► HRR connecting nipples

Keeping the correct accessories with the welding equipment makes it easier to move from belt identification to preparation & joining without discovering that a required clamp, jaw or finishing tool is missing.

A tool is not just a tool. It’s a promise. provides broader workshop context around keeping dependable equipment available when it is needed.

For maintenance teams planning equipment requirements ahead of busy operating periods, Spring Jobsite Prep Getting Your Gear Ready provides additional preparation guidance.