Pulley SPZ 170/2 for Taper Lock 2012 — Optibelt
Optibelt SPZ 170/2 pulley, two grooves, D 170 mm, Da 174 mm, B 28 mm, cast iron. For Taper Lock 2012. Without bushing — sold separately. Available from 1 piece, fulfilment within 48 hours.
Pulley SPZ 170/2 for Taper Lock bushing 2012 — Optibelt
The offer includes the pulley only. The Taper Lock bushing is not included and is sold separately.
Optibelt TB SPZ 170/2 cast-iron pulley, solid, with two grooves, intended for fitting with a type 2012 bushing. Select the bushing bore to match the shaft diameter.
Select a Taper Lock bushing for this pulley
Required bushing type: 2012. Choose a bore matching the shaft diameter. Clicking a tile opens a separate bushing page — it does not add the bushing to the basket automatically.
Check the bushing price and availability on its product page. These are selected bores, not the full range for type 2012.
Pulley dimensions and specifications
| Manufacturer | Optibelt |
|---|---|
| Designation | TB SPZ 170/2 |
| Pulley profile | SPZ |
| Number of grooves | 2 |
| Datum diameter D | 170 mm |
| Outside diameter Da | 174 mm |
| Pulley width B | 28 mm |
| Required bushing type | Taper Lock 2012 — sold separately |
| Material | Cast iron |
| Design | Solid pulley |
| Belt profiles specified for this pulley | Z, HZ, ZX, SPZ, XPZ |
| OEM reference | ZT01702 |
How to select the pulley and bushing
Check the belt profile, diameter and two grooves of the pulley. Use a type 2012 bushing and select its bore to match the shaft. Type 2012 does not indicate the shaft diameter. Allow for the keyed connection. Available from 1 piece, fulfilment within 48 hours. The pulley price does not include the bushing; the products are ordered separately.
Taper Lock 2012 bushing installation — summary for Optibelt
Switch off the drive and secure it against starting. Follow the machine manufacturer's instructions.
- Degrease the shaft, bushing bore and both tapered surfaces; leave them free of oil.
- Insert the bushing into the hub and align the threaded and unthreaded halves of the holes.
- Lightly oil only the screws and fit them loosely.
- Position the assembly on the shaft; if a key is used, maintain clearance above it. Check pulley alignment before and after tightening.
- Tighten evenly with a torque wrench: Optibelt TB 2012 — 31 Nm for each of the two screws. Do not apply this value to other types or brands.
- After 30–60 minutes of operation, stop and secure the machine; check that the screws are tight. Protect unused holes with grease according to the instructions.
This summary does not replace the instructions for the particular bushing and machine. Full Optibelt instructions — PDF, table on page 2, installation on page 4.
The main image is an original illustration of a solid pulley with two grooves, without bushing. The offer table specifies the dimensions and required bushing type. Before selecting a belt, check the minimum permitted pulley diameter and operating conditions in the documentation for the particular belt.

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