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.
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Angular contact ball bearing pair, 45 x 85 x 19 mm, 29° contact angle, universally ground for back-to-back, face-to-face or tandem mounting, open.
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Here are some other options that might fit your project — cross-referenced equivalents and similar parts we have in stock and ready to ship. Need help choosing? Call 585-295-7880.
Super-Precision Angular Contact Ball Bearing Matched Pair 45x85x19 mm 29° ABEC 7 Duplex Ground$129.25
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Angular Contact Ball Bearing Duplex Pair - 45 mm ID, 85 mm OD, 19 mm Width, 15° Contact Angle, Light Preload, ABEC 7 / P4$42.41
Angular Contact Ball Bearing — 45 mm ID, 85 mm OD, 19 mm Width, 15° Contact Angle, ABEC 7, Light Preload$51.26| MFR / Brand | MRC |
|---|---|
| Model | 7209-DB-DF-DT 102 |
| Bearing Type | Angular Contact Ball Bearing |
| ID | 45 mm |
| OD | 85 mm |
| Width | 19 mm |
| Material | Steel |
|---|---|
| Series | MRC 7200 light (ISO 72 dimension series) |
| Base Number | 7209 (ISO 7209 envelope) |
| Industry Terms | Angular contact ball bearing; universally ground pair; duplex bearing set; spindle bearing; Marlin Rockwell; 7209 |
| Common Misspellings | 7209 DBDFDT; 7209DBDFTD; 7209-DBDFDT-102; MCR 7209DBDFDT |
| Total Width | 38 mm as a mounted pair |
| Bore Shaft Size | 45 mm |
| Mpn Variants | 7209DBDFDT-102; 7209 DB DF DT 102; 7209DBDFDT; 7209DB; 7209DF; 7209DT |
| Manufacturer Status | MRC brand acquired by SKF; designation discontinued |
| Arrangement Configuration | Universally ground pair, mountable back-to-back, face-to-face or tandem |
| Rolling Elements | Ball |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 29° |
| Part Number | 7209DBDFDT-102 |
| Cross Reference 1 | ISO 7209 (same 45 x 85 x 19 mm envelope) |
|---|
MRC 7209DBDFDT-102 angular contact ball bearings, supplied as a pair. Bearing type: Angular contact ball bearing. Bore: 45 mm. Outside Diameter: 85 mm. Overall Width: 19 mm per bearing. Total Width: 38 mm as a mounted pair. Contact Angle: 29°. Bore Type: Straight. Closure Type: Open, both faces. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Material: Chrome bearing steel. Series: MRC 7200 light, ISO 72 dimension series. Unit Quantity: 2 Pcs.
72 — light section angular contact series, matching the ISO 72 dimension series.
09 — bore code giving Bore: 45 mm.
No type letter — the standard MRC angular contact execution, Contact Angle: 29°.
DB DF DT — universally ground faces, so the bearings clamp together in any of the three arrangements: back-to-back, face-to-face or tandem.
Contact Angle: 29°. The mid-range angle balances thrust capacity against speed, carrying more axial load than a 15° bearing and running faster than a 40° one in the same envelope. Universally ground faces are the useful part here: the same two bearings set a repeatable preload in whichever arrangement the machine calls for, with no shim stack and no measuring at assembly. Back-to-back gives the widest load span and the most resistance to shaft tilting; face-to-face tolerates misalignment better; tandem doubles thrust capacity in one direction.
Unit Quantity: 2 Pcs. Two universally ground bearings, supplied together and mountable back-to-back, face-to-face or in tandem. Open on both faces, straight bore.
Straight bore on an interference-fit shaft seat, outer rings located in a bored housing. The pair is clamped through both inner rings and both outer rings together so the ground offset closes and sets the preload. The chosen arrangement is fixed by which way each bearing faces on assembly.
The 45 x 85 x 19 mm envelope is the ISO 7209 seat, so a 7209 from any maker fits the same shaft and housing. The 29° contact angle is specific to the standard MRC execution: an ISO 7209 AC at 25° or a 7209 B at 40° shares the same seats at a different angle and is a related size rather than an interchange.
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Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Tapered, cylindrical, and spherical roller bearings all solve the same basic problem, carrying more load
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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