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Timing Belt Pulleys and V-Belt Sheaves: Matching Belt Drive Components Correctly
Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Availability:
4 in stock
Super-precision Ex-Cell-O spindle bearing, 1-1/4 x 2-11/16 x 5/8 in, phenolic cage. Duplex universal pair, ground flush for DB, DF or DT mounting.
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$397.13
4 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | MM135EXCRDU-20 |
| Model | MM135EXCRDU20 |
| Bearing Type | Angular Contact Ball Bearing |
| ID | 1.2500 in (31.750 mm) |
| OD | 2.6875 in (68.263 mm) |
| Width | 5/8 in |
| Base Number | MM135EX |
|---|---|
| Industry Terms | Ex-Cell-O spindle bearing; super precision spindle bearing; machine tool bearing; duplex matched pair |
| Common Misspellings | MM135EXCRDU 20#; MM-135-EX-CR-DU-20; MM135EXCROU20; MM135 EXCRDU20 |
| Application Types | Ex-Cell-O machine tool spindles; precision boring and milling spindles; inch-nominal spindle rebuilds |
| Total Width | 1.2500 in (31.750 mm) |
| Overall Width | 0.6250 in (15.875 mm) |
| Mpn Variants | MM135EXCRDU-20; MM135EXCRDU20; MM 135 EX CR DU 20; MM135EXCRDU; MM135EX |
| Precision Class | ABEC 7/9 / P4S |
| Series | MM EX |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50 |
| Mounting Arrangement | Duplex universal (DU) |
| Design Units | Imperial |
| Bearing Material | Bearing steel |
| Closure Type | Open |
Fafnir MM135EXCRDU-20 is a super-precision angular contact spindle bearing from Timken’s Ex-Cell-O (EX) series, supplied as a duplex universal pair. Unit Quantity: 2 Pcs.
MM — Timken Fafnir super-precision grade P4S. Timken’s Machine Tool Catalog sets P4S running accuracy at ABEC 9 / ISO P2 while holding the remaining bearing features at ABEC 7 / ISO P4.
EX — the Ex-Cell-O series, built on Timken WI construction and dimensioned for inch-nominal machine tool spindles, with bore and outside-diameter tolerances held nominal to plus.
CR — phenolic composition cage, Timken’s standard cage for super-precision spindle bearings.
DU — duplex universal. Two bearings ground as a matched set with flush faces, so the pair mounts back to back, face to face or in tandem.
Bore Diameter: 1.2500 in (31.750 mm).
Outside Diameter: 2.6875 in (68.263 mm).
Overall Width: 0.6250 in (15.875 mm) per bearing.
Total Width: 1.2500 in (31.750 mm) for the pair.
Precision Class: ABEC 7/9 / P4S.
Cage Material: Phenolic.
Rolling Elements: Ball.
Closure Type: Open.
Mounting Arrangement: Duplex universal (DU).
Series: MM EX. Base Number: MM135EX.
Bore Type: Straight. Bore 1-1/4 in, outside diameter 2-11/16 in, width 5/8 in per bearing. Design Units: Imperial. Harmonization Code: 8482.10.50.
Each bearing is 1-1/4 in (31.750 mm) bore, 2-11/16 in (68.263 mm) outside diameter and 5/8 in (15.875 mm) wide.
DU is duplex universal: two bearings ground as a matched set with flush faces, so the pair mounts back to back, face to face or in tandem. Unit Quantity: 2 Pcs.
MM is the Timken Fafnir P4S super-precision grade and CR is a phenolic composition cage.
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